Common use of HVAC Clause in Contracts

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 ▇▇▇▇▇ per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system's ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant's expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system are in accordance with the Massachusetts Energy Code and shall not be less than the following: i) Cooling season indoor conditions of not in excess of 78 degrees Fahrenheit when outdoor conditions are 91 degrees Fahrenheit drybulb and 73 degrees Fahrenheit wetbulb. ii) Heating season minimum room temperature of 72 degrees Fahrenheit when outdoor conditions are 6 degrees Fahrenheit drybulb. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal charges may require during Normal Building Operating Hours (8:00 a.m. to 6:00 p.m., Monday through Friday, and 8:00 a.m. to 1:00 p.m. on Saturdays, legal holidays in all cases excepted). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any season outside Normal Building Operating Hours, Landlord shall use landlord's best efforts to furnish such services for the area or areas specified by written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. For such services, Tenant shall pay Landlord, as additional rent, upon receipt of billing, a sum equal to the cost incurred by Landlord.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 ▇▇▇▇▇ per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system's ’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant's ’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system are in accordance with the Massachusetts Energy Code and shall not be less than the following: (i) Cooling season indoor conditions temperatures of not in excess of 78 73 - 79 degrees Fahrenheit when outdoor conditions temperatures are 91 degrees Fahrenheit drybulb and 73 degrees Fahrenheit wetbulbambient. (ii) Heating season minimum room temperature of 72 68 - 75 degrees Fahrenheit when outdoor conditions temperatures are 6 degrees Fahrenheit drybulbambient. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal charges changes may require during Normal Building Operating Hours (the hours of 8:00 a.m. to 6:00 p.m., p.m. Monday through Friday, and 8:00 a.m. to 1:00 p.m. on Saturdays, Friday (legal holidays in all cases excepted). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any season outside Normal Building Operating Hoursother time period, Landlord shall use landlord's ’s best efforts to furnish such services for the area or areas specified by written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. For Landlord shall charge Tenant for such servicesextra-hours usage at reasonable rates customary for first-class office buildings in the Boston Suburban market, and Tenant shall pay Landlord, as additional rentAdditional Rent, upon receipt of billing, a sum equal to the cost incurred by Landlordbilling therefor.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 6.0 ▇▇▇▇▇ per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system's ’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant's ’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system are in accordance with the Massachusetts Energy Code and shall not be less than the following: i(1) Cooling season indoor conditions temperature of not in excess of 78 73 - 79 degrees Fahrenheit when outdoor conditions are temperature is 91 degrees Fahrenheit drybulb and 73 degrees Fahrenheit wetbulbambient. ii(2) Heating season minimum room temperature of 72 68 - 75 degrees Fahrenheit when outdoor conditions are temperature is 6 degrees Fahrenheit drybulbambient. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal charges changes may require during Normal Building Operating Hours (8:00 a.m. to 6:00 p.m., Monday through Friday, and 8:00 a.m. to 1:00 p.m. on Saturdays, legal holidays in all cases excepted). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any season outside Normal Building Operating Hours, Landlord shall use landlord's ’s best efforts to furnish such services for the area or areas specified by written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. For such services, Tenant shall pay Landlord, as additional rentAdditional Rent, upon receipt of billing, a sum equal to the cost incurred by Landlord.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 ▇▇▇▇▇ per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system's ’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant's ’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system are in accordance with the Massachusetts Energy Code and shall not be less than the following: (i) Cooling season indoor conditions temperature of not in excess of 78 73 - 79 degrees Fahrenheit when outdoor conditions are temperature is 91 degrees Fahrenheit drybulb and 73 degrees Fahrenheit wetbulbambient. (ii) Heating season minimum room temperature of 72 68 - 75 degrees Fahrenheit when outdoor conditions are temperature is 6 degrees Fahrenheit drybulbambient. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal charges changes may require during Normal Building Operating Hours (the hours of 8:00 a.m. to 6:00 p.m., p.m. Monday through Friday, and 8:00 a.m. to 1:00 p.m. on Saturdays, Friday (legal holidays in all cases excepted). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any season outside Normal Building Operating Hoursother time period, Landlord shall use landlord's ’s best efforts to furnish such services for the area or areas specified by written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. For Landlord shall charge Tenant for such servicesextra-hours usage at reasonable rates customary for first-class office buildings in the Boston Suburban market, and Tenant shall pay Landlord, as additional rentAdditional Rent, upon receipt of billing, a sum equal to the cost incurred by Landlordbilling therefore.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 ▇▇▇▇▇ per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system's ’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant's ’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system are in accordance with the Massachusetts Energy Code and shall not be less than the following: (i) Cooling season indoor conditions temperatures of not in excess of 78 73 - 79 degrees Fahrenheit when outdoor conditions temperatures are 91 degrees Fahrenheit drybulb and 73 degrees Fahrenheit wetbulbambient. (ii) Heating season minimum room temperature of 72 68 - 75 degrees Fahrenheit when outdoor conditions temperatures are 6 degrees Fahrenheit drybulbambient. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal charges changes may require during Normal Building Operating Hours (the hours of 8:00 a.m. to 6:00 p.m., p.m. Monday through Friday, and 8:00 a.m. to 1:00 p.m. on Saturdays, Friday (legal holidays in all cases excepted). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any season outside Normal Building Operating Hoursother time period, Landlord shall use landlord's ’s best efforts to furnish such services for the area or areas specified by written request of Tenant ▇▇▇▇▇▇ delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. For Landlord shall charge Tenant for such servicesextra-hours usage at reasonable rates customary for first-class office buildings in the Boston Suburban market, and Tenant shall pay Landlord, as additional rentAdditional Rent, upon receipt of billing, a sum equal to the cost incurred by Landlordbilling therefor.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 ▇▇▇▇▇ per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system's ’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant's ’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system are in accordance with the Massachusetts Energy Code and shall not be less than the following: (i) Cooling season indoor conditions temperatures of not in excess of 78 73 - 79 degrees Fahrenheit when outdoor conditions temperatures are 91 degrees Fahrenheit drybulb and 73 degrees Fahrenheit wetbulbambient. (ii) Heating season minimum room temperature of 72 68 - 75 degrees Fahrenheit when outdoor conditions temperatures are 6 degrees Fahrenheit drybulbambient. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal charges changes may require during Normal Building Operating Hours (the hours of 8:00 a.m. to 6:00 p.m., p.m. Monday through Friday, and 8:00 a.m. to 1:00 p.m. on Saturdays, Friday (legal holidays in all cases excepted). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any season outside Normal Building Operating Hoursother time period, Landlord shall use landlord's ’s best efforts to furnish such services for the area or areas specified by written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. For Landlord shall charge Tenant for such servicesextra-hours usage at reasonable rates customary for first class office buildings in the Central Suburban 128 Market, and Tenant shall pay Landlord, as additional rentAdditional Rent, upon receipt of billing, a sum equal to the cost incurred by Landlordbilling therefor.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 ▇▇▇▇▇ per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system's ’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant's ’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system are in accordance with the Massachusetts Energy Code and shall not be less than the following: (i) Cooling season indoor conditions temperatures of not in excess of 78 73 -79 degrees Fahrenheit when outdoor conditions temperatures are 91 degrees Fahrenheit drybulb and 73 degrees Fahrenheit wetbulbambient. (ii) Heating season minimum room temperature of 72 68 - 75 degrees Fahrenheit when outdoor conditions temperatures are 6 degrees Fahrenheit drybulbambient. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal charges changes may require during Normal Building Operating Hours (the hours of 8:00 a.m. to 6:00 p.m., Monday through Friday, and 8:00 a.m. to 1:00 p.m. on Saturdays, Friday (legal holidays in all cases excepted). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any season outside Normal Building Operating Hoursother time period, Landlord shall use landlord's ’s best efforts to furnish such services for the area or areas specified by written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. For Landlord shall charge Tenant for such servicesextra-hours usage at reasonable rates customary for first-class office buildings in the Boston Suburban market, and Tenant shall pay Landlord, as additional rent, upon receipt of billing, a sum equal to the cost incurred by Landlordbilling therefor.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 ▇w▇▇▇▇ per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system's ’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant's ’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system are in accordance with the Massachusetts Energy Code and shall not be less than the following: (i) Cooling season indoor conditions temperature of not in excess of 78 73 - 79 degrees Fahrenheit when outdoor conditions are temperature is 91 degrees Fahrenheit drybulb and 73 degrees Fahrenheit wetbulbambient. (ii) Heating season minimum room temperature of 72 68 - 75 degrees Fahrenheit when outdoor conditions are temperature is 6 degrees Fahrenheit drybulbambient. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal charges changes may require during Normal Building Operating Hours (the hours of 8:00 a.m. to 6:00 p.m., p.m. Monday through Friday, and 8:00 a.m. to 1:00 p.m. on Saturdays, Friday (legal holidays in all cases excepted). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any season outside Normal Building Operating Hoursother time period, Landlord shall use landlord's ’s best efforts to furnish such services for the area or areas specified by written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. For Landlord shall charge Tenant for such servicesextra-hours usage at reasonable rates customary for first-class office buildings in the Boston Suburban market, and Tenant shall pay Landlord, as additional rentAdditional Rent, upon receipt of billing, a sum equal to the cost incurred by Landlordbilling therefor.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 ▇▇▇▇▇ per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system's ’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant's ’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system are in accordance with the Massachusetts Energy Code and shall not be less than the following: (i) Cooling season indoor conditions temperatures of not in excess of 78 73 - 79 degrees Fahrenheit when outdoor conditions temperatures are 91 degrees Fahrenheit drybulb and 73 degrees Fahrenheit wetbulbambient. (ii) Heating season minimum room temperature of 72 68 - 75 degrees Fahrenheit when outdoor conditions temperatures are 6 degrees Fahrenheit drybulbambient. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal charges changes may require during Normal Building Operating Hours (the hours of 8:00 a.m. to 6:00 p.m., Monday through Friday, and 8:00 a.m. to 1:00 p.m. on Saturdays, Friday (legal holidays in all cases excepted) (the “HVAC Hours”). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any season outside Normal Building Operating Hoursother time period, Landlord shall use landlord's ’s best efforts to furnish such services for the area or areas specified by written request of Tenant delivered Te▇▇▇▇ ▇elivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. For Landlord shall charge Tenant for such servicesextra-hours usage at reasonable rates customary for first-class office buildings in the East Cambridge/▇▇▇▇▇▇▇ Square market, and Tenant shall pay Landlord, as additional rentAdditional Rent, upon receipt of billing, a sum equal to the cost incurred by Landlordbilling therefor.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 ▇▇▇▇▇ per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system's ’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant's ’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system are in accordance with the Massachusetts Energy Code and shall not be less than the following: (i) Cooling season indoor conditions temperatures of not in excess of 78 73 79 degrees Fahrenheit when outdoor conditions temperatures are 91 degrees Fahrenheit drybulb and 73 degrees Fahrenheit wetbulbambient. (ii) Heating season minimum room temperature of 72 68 - 75 degrees Fahrenheit when outdoor conditions temperatures are 6 degrees Fahrenheit drybulbambient. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal charges changes may require during Normal Building Operating Hours (the hours of 8:00 a.m. to 6:00 p.m., p.m. Monday through Friday, and 8:00 a.m. to 1:00 p.m. on Saturdays, Friday (legal holidays in all cases excepted). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any season outside Normal Building Operating Hoursother time period, Landlord shall use landlord's ’s best efforts to furnish such services for the area or areas specified by written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. For Landlord shall charge Tenant for such servicesextra-hours usage at reasonable rates customary for first-class office buildings in the Boston Suburban market, and Tenant shall pay Landlord, as additional rentAdditional Rent, upon receipt of billing, a sum equal to the cost incurred by Landlordbilling therefor.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 ▇▇▇▇▇ per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system's ’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant's ’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system are in accordance with the Massachusetts Energy Code and shall not be less than the following: (i) Cooling season indoor conditions temperature of not in excess of 78 73 - 79 degrees Fahrenheit when outdoor conditions are temperature is 91 degrees Fahrenheit drybulb and 73 degrees Fahrenheit wetbulbambient. (ii) Heating season minimum room temperature of 72 68 - 75 degrees Fahrenheit when outdoor conditions are temperature is 6 degrees Fahrenheit drybulbambient. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal charges changes may require during Normal Building Operating Hours (the hours of 8:00 a.m. to 6:00 p.m., p.m. Monday through Friday, and 8:00 a.m. to 1:00 p.m. on Saturdays, Friday (legal holidays in all cases excepted). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any season outside Normal Building Operating Hoursother time period, Landlord shall use landlord's ’s best efforts to furnish such services for the area or areas specified by written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. For Landlord shall charge Tenant for such servicesextra-hours usage at reasonable rates customary for first-class office buildings in the Boston Suburban market, and Tenant shall pay Landlord, as additional rentAdditional Rent, upon receipt of billing, a sum equal to the cost incurred by Landlordbilling therefor.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 ▇▇▇▇▇ per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system's ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant's expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system are in accordance with the Massachusetts Energy Code and shall not be less than the following: i) Cooling season indoor conditions of not in excess of 78 degrees Fahrenheit when outdoor conditions are 91 degrees Fahrenheit drybulb and 73 degrees Fahrenheit wetbulb.. Exhibit 10.9 ii) Heating season minimum room temperature of 72 degrees Fahrenheit when outdoor conditions are 6 degrees Fahrenheit drybulb. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal charges may require during Normal Building Operating Hours (8:00 a.m. to 6:00 p.m., Monday through Friday, and 8:00 a.m. to 1:00 p.m. on Saturdays, legal holidays in all cases excepted). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any season outside Normal Building Operating Hours, Landlord shall use landlord's best efforts to furnish such services for the area or areas specified by written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. For such services, Tenant shall pay Landlord, as additional rent, upon receipt of billing, a sum equal to the cost incurred by Landlord.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 6.0 ▇▇▇▇▇ per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system's ’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant's ’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system are in accordance with the Massachusetts Energy Code and shall not be less than the following: (i) Cooling season indoor conditions temperature of not in excess of 78 73 - 79 degrees Fahrenheit when outdoor conditions are temperature is 91 degrees Fahrenheit drybulb and 73 degrees Fahrenheit wetbulbambient. (ii) Heating season minimum room temperature of 72 68 - 75 degrees Fahrenheit when outdoor conditions are temperature is 6 degrees Fahrenheit drybulbambient. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal charges changes may require during Normal Building Operating Hours (8:00 a.m. to 6:00 p.m., Monday through Friday, and 8:00 a.m. to 1:00 p.m. on Saturdays, legal holidays in all cases excepted). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any season outside Normal Building Operating Hours, Landlord shall use landlord's ’s best efforts to furnish such services for the area or areas specified by written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. For such services, Tenant shall pay Landlord, as additional rentAdditional Rent, upon receipt of billing, a sum equal to the cost incurred by Landlord.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 ▇▇▇▇▇ per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system's ’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant's ’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system are in accordance with the Massachusetts Energy Code and shall not be less than the following: (i) Cooling season indoor conditions temperatures of not in excess of 78 73 - 79 degrees Fahrenheit when outdoor conditions temperatures are 91 degrees Fahrenheit drybulb and 73 degrees Fahrenheit wetbulbambient. (ii) Heating season minimum room temperature of 72 68 - 75 degrees Fahrenheit when outdoor conditions temperatures are 6 degrees Fahrenheit drybulbambient. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal charges changes may require during Normal Building Operating Hours (the hours of 8:00 a.m. to 6:00 p.m., Monday through Friday, and 8:00 a.m. to 1:00 p.m. on Saturdays, Friday (legal holidays in all cases excepted) (the “HVAC Hours”). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any season outside Normal Building Operating Hoursother time period, Landlord shall use landlord's ’s best efforts to furnish such services for the area or areas specified by written request of Tenant ▇▇▇▇▇▇ delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. For Landlord shall charge Tenant for such servicesextra-hours usage at reasonable rates customary for first-class office buildings in the East Cambridge/▇▇▇▇▇▇▇ Square market, and Tenant shall pay Landlord, as additional rentAdditional Rent, upon receipt of billing, a sum equal to the cost incurred by Landlordbilling therefor.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 ▇▇▇▇▇ per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system's ’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant's ’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system are in accordance with the Massachusetts Energy Code and shall not be less than the following: (i) Cooling season indoor conditions temperatures of not in excess of 78 73 - 79 degrees Fahrenheit when outdoor conditions temperatures are 91 degrees Fahrenheit drybulb and 73 degrees Fahrenheit wetbulbambient or higher. (ii) Heating season minimum room temperature of 72 68 - 75 degrees Fahrenheit when outdoor conditions temperatures are 6 degrees Fahrenheit drybulbambient or lower. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal charges changes may require during Normal Building Operating Hours (the hours of 8:00 a.m. to 6:00 p.m., p.m. Monday through Friday, and 8:00 a.m. to 1:00 p.m. on Saturdays, Friday (legal holidays in all cases excepted). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any season outside Normal Building Operating Hoursother time period, Landlord shall use landlord's ’s best efforts to furnish such services for the area or areas specified by written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. For Landlord shall charge Tenant for such servicesextra-hours usage at reasonable rates customary for first-class office buildings in the Boston Suburban market, and Tenant shall pay Landlord, as additional rentAdditional Rent, upon receipt of billing, a sum equal to the cost incurred by Landlordbilling therefor.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting lightning and standard electrical load of 3.0 ▇▇▇▇▇ per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system's ’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and arid installed by Landlord at Tenant's ’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system are in accordance with the Massachusetts Energy Code and shall not be less than the following: i) Cooling season indoor conditions temperature of not in excess of 78 73 - 79 degrees Fahrenheit when outdoor conditions are temperature is 91 degrees Fahrenheit drybulb and 73 degrees Fahrenheit wetbulbambient. ii) Heating season minimum room temperature of 72 68 - 75 degrees Fahrenheit when outdoor conditions are temperature is 6 degrees Fahrenheit drybulbambient. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal charges changes may require during Normal Building Operating Hours (8:00 a.m. to 6:00 p.m.P.m., Monday through Friday, and 8:00 a.m. to 1:00 p.m. on Saturdays, legal holidays in all cases excepted). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any season outside Normal Building Operating Hours, Landlord shall use landlord's ’s best efforts to furnish such services for the area or areas specified by written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. For such services, Tenant shall pay Landlord, as additional rent, upon receipt of billing, a sum equal to the cost incurred by Landlord.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 ▇▇▇▇▇ per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system's ’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant's ’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system are in accordance with the Massachusetts Energy Code and shall not be less than the following: (i) Cooling season indoor conditions temperatures of not in excess of 78 73—79 degrees Fahrenheit when outdoor conditions temperatures are 91 degrees Fahrenheit drybulb and 73 degrees Fahrenheit wetbulbambient. (ii) Heating season minimum room temperature of 72 68—75 degrees Fahrenheit when outdoor conditions temperatures are 6 degrees Fahrenheit drybulbambient. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal charges changes may require during Normal Building Operating Hours (the hours of 8:00 a.m. to 6:00 p.m., p.m. Monday through Friday, and 8:00 a.m. to 1:00 p.m. on Saturdays, Friday (legal holidays in all cases excepted). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any season outside Normal Building Operating Hoursother time period, Landlord shall use landlord's Landlord’s best efforts to furnish such services for the area or areas specified by written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. For Landlord shall charge Tenant for such servicesextra-hours usage at reasonable rates customary for first-class office buildings in the Boston Suburban market, and Tenant shall pay Landlord, as additional rentAdditional Rent, upon receipt of billing, a sum equal to the cost incurred by Landlordbilling therefor.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 ▇w▇▇▇▇ per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system's ’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant's ’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system are in accordance with the Massachusetts Energy Code and shall not be less than the following: (i) Cooling season indoor conditions temperature of not in excess of 78 73 – 79 degrees Fahrenheit when outdoor conditions temperatures are 91 degrees Fahrenheit drybulb and 73 degrees Fahrenheit wetbulbambient. (ii) Heating season minimum room temperature of 72 68 – 75 degrees Fahrenheit when outdoor conditions temperatures are 6 degrees Fahrenheit drybulbambient. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal charges changes may require during Normal Building Operating Hours (the hours of 8:00 a.m. to 6:00 p.m., 7:00 p.m. Monday through Friday, and 8:00 a.m. to 1:00 p.m. on Saturdays, Friday (legal holidays in all cases excepted). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any season outside Normal Building Operating Hoursother time period, Landlord shall use landlord's ’s best efforts to furnish such services for the area or areas specified by written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. For Landlord shall charge Tenant for such servicesextra-hours usage at reasonable rates customary for first-class office buildings in the Boston Suburban market, and Tenant shall pay Landlord, as additional rentAdditional Rent, upon receipt of billing, a sum equal to the cost incurred by Landlordbilling therefor.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 4.5 ▇▇▇▇▇ per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system's ’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant's ’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system are in accordance with the Massachusetts Energy Code and shall not be less than the following: (i) Cooling season indoor conditions temperatures of not in excess of 73-78 degrees Fahrenheit when outdoor conditions temperatures are 91 degrees Fahrenheit drybulb and 73 degrees Fahrenheit wetbulbambient. (ii) Heating season minimum room temperature of 72 68-75 degrees Fahrenheit when outdoor conditions temperatures are 6 degrees Fahrenheit drybulbambient. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal charges changes may require during Normal Building Operating Hours (the hours of 8:00 a.m. to 6:00 p.m., p.m. Monday through Friday, and 8:00 a.m. to 1:00 p.m. on Saturdays, Friday (legal holidays in all cases excepted). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any season outside Normal Building Operating Hoursother time period, Landlord shall use landlord's Landlord’s best efforts to furnish such services for the area or areas specified by written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. For Landlord shall charge Tenant for such servicesextra-hours usage at rates to be calculated in accordance with Exhibit D-1 attached hereto, and Tenant shall pay Landlord, as additional rentAdditional Rent, upon receipt of billing, a sum equal to the cost incurred by Landlordbilling therefor.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 ▇▇▇▇▇ per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system's ’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant's ’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system are in accordance with the Massachusetts Energy Code and shall not be less than the following: (i) Cooling season indoor conditions temperatures of not in excess of 78 73 - 79 degrees Fahrenheit when outdoor conditions temperatures are 91 degrees Fahrenheit drybulb and 73 degrees Fahrenheit wetbulbambient. (ii) Heating season minimum room temperature of 72 68 - 75 degrees Fahrenheit when outdoor conditions temperatures are 6 degrees Fahrenheit drybulbambient. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal charges changes may require during Normal Building Operating Hours (the hours of 8:00 a.m. to 6:00 p.m., Monday through Friday, and 8:00 a.m. to 1:00 p.m. on Saturdays, Friday (legal holidays in all cases excepted). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any season outside Normal Building Operating Hoursother time period, Landlord shall use landlord's ’s best efforts to furnish such services for the area or areas specified by written request of Tenant delivered Te▇▇▇▇ ▇elivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. For Landlord shall charge Tenant for such servicesextra-hours usage at reasonable rates customary for first-class office buildings in the Boston Suburban market, and Tenant shall pay Landlord, as additional rent, upon receipt of billing, a sum equal to the cost incurred by Landlordbilling therefor.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 ▇▇▇▇▇ per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system's ’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant's ’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system are in accordance with the Massachusetts Energy Code and shall not be less than the following: (i) Cooling season indoor conditions temperatures of not in excess of 78 73 - 79 degrees Fahrenheit when outdoor conditions temperatures are 91 degrees Fahrenheit drybulb and 73 degrees Fahrenheit wetbulbambient. (ii) Heating season minimum room temperature of 72 68 - 75 degrees Fahrenheit when outdoor conditions temperatures are 6 degrees Fahrenheit drybulbambient. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal charges changes may require during Normal Building Operating Hours (the hours of 8:00 a.m. to 6:00 p.m., p.m. Monday through FridayFriday and (only upon written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding, and 8:00 but without supplemental charge) during the hours of 9:00 a.m. to 1:00 p.m. on Saturdays, Saturday (legal holidays in all cases excepted). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any season outside Normal Building Operating Hoursother time period, Landlord shall use landlord's ’s best efforts to furnish such services for the area or areas specified by written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. For Landlord shall charge Tenant for such servicesextra-hours usage at reasonable rates customary for first-class office buildings in the Boston Suburban market, and Tenant shall pay Landlord, as additional rentAdditional Rent, upon receipt of billing, a sum equal to the cost incurred by Landlordbilling therefor.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (( 1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 6.0 ▇▇▇▇▇ per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system's ’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant's ’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system are in accordance with the Massachusetts Energy Code and shall not be less than the following: (i) Cooling season indoor conditions temperature of not in excess of 78 73 - 79 degrees Fahrenheit when outdoor conditions are temperature is 91 degrees Fahrenheit drybulb and 73 degrees Fahrenheit wetbulbambient. (ii) Heating season minimum room temperature of 72 68 - 75 degrees Fahrenheit when outdoor conditions are temperature is 6 degrees Fahrenheit drybulbambient. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal charges changes may require during Normal Building Operating Hours (8:00 a.m. 8:00a.m. to 6:00 p.m.6:00p.m., Monday through Friday, and 8:00 a.m. to 1:00 p.m. on Saturdays, legal holidays in all cases excepted). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any season outside Normal Building Operating Hours, Landlord shall use landlord's ’s best efforts to furnish such services for the area or areas specified by written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. 3:00p.m. of the business day preceding the extra usage. For such services, Tenant shall pay Landlord, as additional rentAdditional Rent, upon receipt of billing, a sum equal to the cost incurred by Landlord.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 ▇▇▇▇▇ per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system's ’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant's ’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system are in accordance with the Massachusetts Energy Code and shall not be less than the following: (i) Cooling season indoor conditions temperatures of not in excess of 78 73 -79 degrees Fahrenheit when outdoor conditions temperatures are 91 degrees Fahrenheit drybulb and 73 degrees Fahrenheit wetbulbambient. (ii) Heating season minimum room temperature of 72 68 - 75 degrees Fahrenheit when outdoor conditions temperatures are 6 degrees Fahrenheit drybulbambient. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal charges changes may require during Normal Building Operating Hours (the hours of 8:00 a.m. to 6:00 p.m., p.m. Monday through Friday, and 8:00 a.m. to 1:00 p.m. on Saturdays, Friday (legal holidays in all cases excepted). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any season outside Normal Building Operating Hoursother time period, Landlord shall use landlord's Landlord’s best efforts to furnish such services for the area or areas specified by written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. For Landlord shall charge Tenant for such servicesextra-hours usage at reasonable rates customary for first-class office buildings in the Boston Suburban market, and Tenant shall pay Landlord, as additional rentAdditional Rent, upon receipt of billing, a sum equal to the cost incurred by Landlordbilling therefor.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 6.0 ▇▇▇▇▇ per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system's ’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant's ’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system are in accordance with the Massachusetts Energy Code and shall not be less than the following: i) Cooling season indoor conditions temperature of not in excess of 78 73 - 79 degrees Fahrenheit when outdoor conditions are temperature is 91 degrees Fahrenheit drybulb and 73 degrees Fahrenheit wetbulbambient. ii) Heating season minimum room temperature of 72 68 - 75 degrees Fahrenheit when outdoor conditions are temperature is 6 degrees Fahrenheit drybulb.Fahrenheit B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal charges changes may require during Normal Building Operating Hours (8:00 a.m. to 6:00 p.m., Monday through Friday, (and upon request 8:00 a.m. to 1:00 p.m. on Saturdays, legal ) the following holidays in all cases excepted). : New Year’s Day President’s Day Memorial Day Independence Day Labor Day Thanksgiving Day Christmas Day If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any season outside Normal Building Operating Hours, Landlord shall use landlord's ’s best efforts to furnish such services for the area or areas specified by written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. For such services, Tenant shall pay Landlord, as additional rentAdditional Rent, upon receipt of billing, a sum equal to the cost incurred by Landlord.