Most HVAC recommended actions focus on the following: Ventilation
Humidity
Filtration
Air Purification – Safely use air cleaning
Temperature
Building Automation Controls
Action 1: Disable demand-controlled ventilation. Action 2: I ncrease outdoor air ventilation rates as much as possible. Action 3: Install localized exhaust systems for source control. For example, keep restroom or the nurses station exhaust operating 24/7.
Action 1: Change filters and clean coils, drain pans and the interior of the air handling units according to the manufacturer’s instructions. Seal the edges of filter racks. Action 2: I nstall filters with increased efficiencies and enhanced particle filtration capability to the greatest extend possible, considering the limitation of the existing air handling equipment. Action 3: Install portable, free-standing high efficiency particulate air (HEPA) filters with integral fans (portable room air cleaners) in high-risk areas.
Action 1: Maintain standard comfort conditions during occupied periods and standard setback/setup unoccupied space temperatures.
Action 1: Maintain space relative humidity (RH) between 40 to 60 percent. Scientific literature generally reflects the most unfavorable survival for microorganisms when the RH is between 40 to 60 percent.
technology as appropriate. Air purification is considered emerging technology and can be explored to supplement the primary methods of ventilation, filtration and humidity controls. These include bipolar ionization and UVC lighting. Be sure to address air purification strategies in an integrated systems manner, working with qualified professionals.
Action 1: Keep systems running longer hours to enhance the effects of increased ventilation and filtration. Investigation is required to ensure system runtimes do not create humidity issues.
www.iasbo.org www.iasbo.org
|| 29 29