COVID-19 ASHRAE Indoor Air Recommendations

ASHRAE Recommends: • Increase outdoor air ventilation (disable demand-controlled ventilation and open outdoor air dampers to 100% as indoor and outdoor conditions permit). • Improve central air and other HVAC filtration to MERV-13 (ASHRAE 2017b) or the highest level achievable. • Keep systems running longer hours (24/7 if possible). • Add portable room air cleaners …