Another Friday! Another Frequently Asked Questions Answered Friday! We’re asked about how burning candles can affect your HVAC system. David has a picture of the filter from an HVAC unit where a lot of candles are burned.
Kris says that if you burn candles, change your filter at least every 2 months. If you burn a lot of candles, change it monthly. Also, this pertains to fires in the fireplace! If you have an open face fire or ventless fireplace, the creosote from burning gets through your filter and can clog up your coil, hurting your system.