When used along with other best practices (such as wearing masks, social distancing, frequent hand washing, and surface disinfection) recommended by the CDC, increasing ventilation can be part of a plan to protect yourself and your family. An official website of the United States government. They use water to provide cooling and increase relative humidity indoors. In situations where wildfires are a concern, follow local advisories. It provides good attic ventilation in addition to whole house cooling. As a general precaution, do not mix cleaning or disinfecting products. Operate a bathroom fan when the bathroom is in use and continuously, if possible. Residential air conditioning systems are usually 100% recirculating, and if you want outdoor air in the space you open a window or windows. Professionals who operate school, office, and commercial buildings should consult guidance by ASHRAE (formerly known as American Society of Heating, Refrigerating and Air-Conditioning Engineers), and other professional and government organizations for information on ventilation and air filtration to help reduce risks from the virus that causes COVID-19. Contact Us to ask a question, provide feedback, or report a problem. Read EPA’s “Guide to air cleaners in the home” for information on placing and operating a portable air cleaner. Some evaporative coolers can be operated without using water when temperatures are milder, to increase ventilation indoors. Avoid using whole-house fans if air pollution outside is high. see the Department of Energy's whole-house fans web page. For additional information on selecting and using whole-house fans, see the Department of Energy's whole-house fans web page. United States Environmental Protection Agency, Information from CDC for people who are sick or caring for someone. So long as the windows are closed, the house is pretty good at not getting hotter, due to insulation, so the AC can remain off for a good period of time. For more information on who may be more vulnerable to COVID-19, refer to CDC's webpage about people at higher risk. If a single fan is used, it should be facing (and blowing air) in the same direction the air is naturally moving. Operate the Heat Recovery Ventilator (HVR) or Energy Recovery Ventilator (ERV) if your home has one. Run the system fan for longer times, or continuously, as HVAC systems filter the air only when the fan is running. Unless we are talking different fans here. An Alternative for Saving Energy. Sensitive individuals may include pregnant women and people with asthma. When cleaning and disinfecting for COVID-19, ventilation is important. Refer to CDC and ASHRAE guidance on isolating COVID-19 patients and protecting people at high risk. Using EPA-registered cleaning and disinfecting products according to their label instructions is the best way to ensure that any indoor air pollution risks are reduced while still maintaining the effectiveness of the disinfecting product. Consult your HVAC manual or an HVAC professional for details. 05/30/2011 23:12 Subject: Do I keep windows open with a central AC fan mode running? Opening the highest and lowest windows in a home at the same time (especially on different floors) can also help to increase ventilation. (Remember all make up air going to the air space is coming from the outdoors. Not Running AC At All. View this list as well as other COVID-19 frequent questions. We've got an old house with no air conditioning. 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