Good point....we started adding this to our quarterly home maintenance program. Filters should really be changed monthly...but if we catch it quarterly that's a step in the right direction!

Quarterly? I wish we could wait that long but we have to change ours once a month. We believe this will change once the old drafty windows are replaced.

We had to come up with something for our clients to catch all of the little things that turn into big repairs. It's $80 a visit with a $50 credit towards work to be performed. It costs clients $120 a year but is money well spent and a win-win for all involved. I've seen homes where the filters weren't changed in years....nasty!

I have mine calendared for reminders. I also use a magic marker to write the date I put in a new filter on the side of the filter.

I have to change mine monthly, because I have the litter box in there and its dust, plus the washer-dryer and its lint etc.

Yup! We just did, make a huge difference!