Corona virus is an infectious disease transmitted person to person and can also become airborne. The virus is nominally 0.125 μm and can range from 0.06 to 0.14 μm. As a reference a human hair is about 75 μm. Similar to the SARS outbreak in 2003 the airborne nature of the current coronavirus (COVID 19) transmission has homeowners and contractors asking if HVAC systems offer any protection.
While the HVAC system alone cannot prevent the transmission of coronavirus the industry's professional association ASHRAE (The American Society of Heating, Refrigerating and Air Conditioning Engineers) has recommended the methods below to help a home's HVAC system to reduce airborne infectious particulate.
ASHRAE position documents states" the spread can be accelerated or controlled by heating, ventilating, and air-conditioning (HVAC) systems".
Center for Disease Control (CDC)