HVAC Systems. The District shall ensure all HVAC systems follow ASHRAE COVID-19 recommendations, optimizing the supply of fresh air to occupied spaces. Air filters shall be MERV-11 or higher and changed at the recommended intervals. The District will deploy true HEPA filter air purifiers based on individual room usage and needs. For general instructional spaces, the District shall focus HEPA filter purifiers on spaces that the most recent Indoor Air Quality sampling (2018) measured CO2 concentrations of more than 1100 PPM. a. Isolation rooms will have six feet of social distancing between symptomatic individuals when possible. They must have dedicated true HEPA filter purifiers in the space and be sealed off from the building ventilation. b. Staff will be provided with surgical masks if they are required to work with students who are exempt from the face covering requirement due to a medical condition. c. Staff may bring in their own personal HEPA air filters if the District does not provide them based on the qualifications listed above. Any HEPA purifiers staff bring to an SPPS site must be UL listed and have a grounded (3-pronged) plug. Ionized air purifiers will not be allowed because they create ozone. d. To maximize the amount of fresh air circulation into buildings, air handler systems will start running two hours in the morning before the building opens and will continue running throughout the day and for four hours in the evening after the school day ends. All demand control ventilation (DCV) should be turned off and units should be run in occupied status. The building will be considered open at the time that the majority of staff arrive for work. Staff will be notified of the specific times that the air handler systems start and end for their building. e. Non-mechanically ventilated spaces cannot be used for in-person instruction or for workspace occupied by more than one person. f. The following information regarding the ASHRAE recommendations and how building’s HVAC system compares will be posted on the SPPS website: the level of MERV filtration for the building and measured CO2 concentrations from the Indoor Air Quality sampling in 2018. TA 1.
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