I could never remember for sure when I changed my A/C furnace filter, so now I write the date I need to replace it on the filter with a permanent marker. Works great! No more trying to remember!
By Barbara from Columbia, KY
Keeping your furnace filter clean and replacing it as needed will increase the efficiency of your furnace. This is a page about "How often should you change your furnace filter?".
Ever wonder when the last time you changed your HVAC filters was? Using a bright colored index card, I write the years, with corresponding months, leaving room for my date I changed the filters for the next three years. I make one for each filter location. I attach it to the wall with two hook and latch dots. I also attach a pen this way, so it's always at the ready!