HVAC Design Clause Samples
The HVAC Design clause outlines the requirements and standards for the design and specification of heating, ventilation, and air conditioning systems within a project. It typically details the performance criteria, energy efficiency targets, and compliance with relevant codes or regulations that the HVAC system must meet. For example, it may require the use of specific equipment types, adherence to sustainability guidelines, or coordination with other building systems. The core function of this clause is to ensure that the HVAC system is properly planned and integrated, providing comfort, safety, and efficiency while minimizing future operational issues.
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HVAC Design. Engineer’s Basic Services also consist of the design services, including structural, mechanical, electrical, and plumbing engineering services, normally required to complete the following under the Bond Program:
HVAC Design. Develop detailed design of HVAC systems for the new SDWRF influent fine screening and grit removal facilities, the new SDWRF RAS pump station, and the new electrical buildings at both WRFs.
HVAC Design. A. The system requirements and equipment sizing outlined in this document are estimated based on minimum standard and the following design guidelines. Design calculations shall be verified during development necessary to implement the project.
B. Equipment Size and Capacity: Preliminary equipment sizes and capacities are listed in this report are for planning. These capacities are not intended to be final equipment sizes. Final load calculations and equipment selection will be performed in accordance with the design criteria.
C. A single supply air system shall be provided to serve both the office and lab spaces, which will allow for a single main supply air duct (installed as tenant finish work) on each floor. The single ring duct reduces the number of ductwork mains and will allow a greater degree of flexibility during tenant infill, when configuring areas between office and lab space.
D. The office and dry lab air will be returned via plenum and main duct risers for recirculation through the building indoor air handling units (AHUs).
E. General and fume hood exhaust air from wet labs will be manifolded together as a combined exhaust.
F. The combined exhaust will be ducted through a run-around coil in the exhaust fan base for tempering the incoming building outdoor air. The tempered outdoor air will be mixed with the building return air and sent back to the indoor air handling units for conditioning.
G. Inside Design Conditions: Systems will be capable of providing a space temperature of 72°F in the winter and 74°F / 50% RH in the summer.
H. Outdoor Design Conditions: Outdoor design conditions shall be as follows (per ASHRAE guidelines):
1. Heating 2°F DB 2. Cooling 95°F DB/76°F MCWB
I. Outdoor Air Quantity: Minimum outdoor air quantities shall be based on ASHRAE Standard 62-2013, International Mechanical Code, and requirements to makeup exhaust airflow requirements. The system outdoor air quantity at the air handling units will be determined by using the Multi-Zone Equation of the Code. The minimum uncorrected outdoor air rates shall be as follows:
1. Laboratories 10 cfm/person + 0.18 cfm/ft2 at 25 persons per 1,000 ft2
2. Offices 5 cfm/person + 0.06 cfm/ft2 at 5 persons per 1,000 ft2
3. Conference Rooms 5 cfm/person + 0.06 cfm/ft2 at 25 persons per 1,000 ft2
4. Corridors 0.06 cfm/ft2
J. Minimum Lab Supply Air Quantity: Laboratory spaces shall be supplied with a minimum of six air changes per hour during occupied hours and four air changes per hour duri...