Not everyone can develop the habit of keeping windows open 2 times a day for 15 minutes, and you don't have to think about it at night when in bedrooms and offices behind closed doors, where many stay up until late carbon dioxide levels can exceed the norm (up to 1000ppt) twice.
Moisture and pollutants from the street enter the room through open windows, the ERV doesn't let it happen
Open windows reduce the energy efficiency of the house, but still does reduce the CO2 stale effect.
Apart from ERV beneficial evidence, keeping windows open
, if there's no other room filtration is still better than nothing. Take actions - save your health. You only have one body to use. Please, take extra care of your indoor environment for the virus period.Authority recommends us to:
1. Keep hands clean, wash them regularly, sanitize and try to keep far from the face. The full CDC.GOV Handwashing and Hand Sanitizer User checklist you can read here
2. Clean AND disinfect frequently touched surfaces
daily. As tables, doorknobs, light switches, countertops, handles, desks, phones, keyboards, toilets, faucets, and sinks.