If you have an evaporative cooler, try not to use it in smoky conditions because it can draw more smoke in. Be sure the filter is in good shape and consider upgrading to a MERV 13 or higher rated filter if your HVAC system can accommodate it. Find out if you have a fresh air intake mode and make sure it is set to “recirculate” instead. The Environmental Protection Agency has the following tips for keeping your inside air as clean as possible: “I would try to set your air conditioning on recirculate so that you’re not breathing in as much of the outdoor air and if you have good level filters on your air conditioner, make sure that they’re in place and that you’re using them.” “I wouldn’t spend a lot of time outside,” Christman said. 
Some units, however, are equipped with a fresh air function, which should not be used. Most air conditioners operate by cooling the air inside the house and recirculating it, not pulling in air from outside.
Brian Christman, a professor of medicine at Vanderbilt University told Nexstar’s WJW that running the air conditioning is fine, so long as the right settings are used.
(NEXSTAR) – When smoke from wildfires turns the outside air unhealthy, is it safe to run the air conditioner?Īn oppressive blanket of smoke from over 100 Canadian wildfires rolled over the East Coast and Midwest Wednesday, leaving many residents concerned about the air quality.ĭr.
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