AIRx ODOR 20x20x1 MERV 7 Carbon Pleated Air Filter - Made in the USA - Box of 6

Hit it with an ozone treatment, but shoot it at the HVAC return and run the fan for maybe 10 minutes. No pets or people should be inside during treatment. Immediately air out afterwards. Then use an active charcoal filter in the HVAC not more than MERV 7. Make sure your HVAC fan is not in the ‘on’ position when running regularly. The humidity will build up. It needs to run on auto to remove humidity if it’s a heat pump. AIRx ODOR 20x20x1 MERV 7 Carbon... https://www.amazon.com/dp/B01ICSF2ZO?ref=ppx_pop_mob_ap_share