4" - 6" Air Filters How does it Work? Complete list of Air Filter Sizes from On Time Air Filters Tell Us How Often Start Service and Relax Your air filter is not at Home Depot? Find it here standard! Here are the standard filter sizes we carry.  We also offer custom filter sizes if you don't see yours.  Either way, we've got the right size filter for you!  And, we're a little different than other filter companies.  We'll send your filters to you automatically on your schedule.  Just select your filters using our filter selection wizard, set your schedule (HVAC system manufacturers recommend replacing air filters every 3 months), place your order and never worry about having to find the right filter sizes again.  We'll send them to you automatically.  When you receive them, you know it's time to replace the old filters.  What could be easier? 8 x 16 x 1 8 x 30 x 1 10 x 10 x 1 10 x 15 x 1 10 x 16 x 1 10 x 20 x 1 10 x 24 x 1

10 x 25 x 1 12 x 12 x 1 12 x 16 x 1 12 x 18 x 1 12 x 20 x 1 12 x 24 x 1 12 x 25 x 1 12 x 27 x 1 12 x 30 x 1 12 x 36 x 1 14 x 14 x 1 14 x 18 x 1 14 x 20 x 1 14 x 24 x 1 14 x 25 x 1 14 x 30 x 1 14 x 36 x 1 15 x 20 x 1 15 x 25 x 1 15 x 30 x 1 16 x 16 x 1 16 x 20 x 1 16 x 24 x 1 16 x 25 x 1 16 x 30 x 1 16 x 36 x 1 17 x 20 x 1 17 x 22 x 1 17 x 25 x 1 18 x 18 x 1 18 x 20 x 1 18 x 22 x 1 18 x 24 x 1 18 x 25 x 1 18 x 30 x 1 18 x 36 x 1 19 x 21 x 1 20 x 20 x 1 20 x 22 x 1 20 x 23 x 1 20 x 24 x 1 20 x 25 x 1 20 x 30 x 1 20 x 36 x 1 21 x 22 x 1 22 x 22 x 1 22 x 24 x 1 24 x 24 x 1 24 x 30 x 1 24 x 36 x 1 25 x 25 x 1 25 x 28 x 1 25 x 29 x 1 25 x 32 x 1 27 x 27 x 1 28 x 30 x 1 29 x 29 x 1 30 x 30 x 1 8 x 16 x 2

8 x 30 x 2 10 x 10 x 2 10 x 15 x 2 10 x 16 x 2 10 x 20 x 2 10 x 24 x 2 10 x 25 x 2 12 x 12 x 2 12 x 16 x 2 12 x 18 x 2 12 x 20 x 2 12 x 24 x 2 12 x 25 x 2 12 x 27 x 2 12 x 30 x 2 12 x 36 x 2 14 x 14 x 2 14 x 18 x 2 14 x 20 x 2 14 x 24 x 2 14 x 25 x 2 14 x 30 x 2air duct cleaning princeton nj 14 x 36 x 2air purifying respirator n95 15 x 20 x 2honeywell hepa air purifier canada 15 x 25 x 2 15 x 30 x 2 16 x 16 x 2 16 x 20 x 2 16 x 24 x 2 16 x 25 x 2 16 x 30 x 2 16 x 36 x 2 17 x 20 x 2 17 x 22 x 2 17 x 25 x 2 18 x 18 x 2 18 x 20 x 2 18 x 22 x 2

18 x 24 x 2 18 x 25 x 2 18 x 30 x 2 18 x 36 x 2 19 x 21 x 2 20 x 20 x 2 20 x 22 x 2 20 x 23 x 2 20 x 24 x 2 20 x 25 x 2 20 x 30 x 2 20 x 36 x 2 21 x 22 x 2 22 x 22 x 2 22 x 24 x 2 24 x 24 x 2 24 x 30 x 2 24 x 36 x 2 25 x 25 x 2 25 x 28 x 2 25 x 29 x 2 25 x 32 x 2 27 x 27 x 2 28 x 30 x 2 29 x 29 x 2 30 x 30 x 2 8 x 16 x 4 8 x 30 x 4 10 x 10 x 4 10 x 15 x 4 10 x 16 x 4 10 x 20 x 4 10 x 24 x 4 10 x 25 x 4 12 x 12 x 4 12 x 16 x 4 12 x 18 x 4 12 x 20 x 4 12 x 24 x 4 12 x 25 x 4 12 x 27 x 4 12 x 30 x 4 12 x 36 x 4 14 x 14 x 4 14 x 18 x 4 14 x 20 x 4 14 x 24 x 4 14 x 25 x 4 14 x 30 x 4 14 x 36 x 4 15 x 20 x 4 15 x 25 x 4 15 x 30 x 4 16 x 16 x 4 16 x 20 x 4 16 x 24 x 4 16 x 25 x 4 16 x 30 x 4 16 x 36 x 4

17 x 20 x 4 17 x 22 x 4 17 x 25 x 4 18 x 18 x 4 18 x 20 x 4 18 x 22 x 4 18 x 24 x 4 18 x 25 x 4 18 x 30 x 4 18 x 36 x 4 19 x 21 x 4 20 x 20 x 4 20 x 22 x 4 20 x 23 x 4 20 x 24 x 4 20 x 30 x 4 20 x 36 x 4 21 x 22 x 4 22 x 22 x 4 22 x 24 x 4 24 x 24 x 4 24 x 30 x 4 24 x 36 x 4 25 x 25 x 4 25 x 28 x 4 25 x 29 x 4 25 x 32 x 4 27 x 27 x 4 28 x 30 x 4 29 x 29 x 4 30 x 30 x 4 12 x 24 x 6 16 x 20 x 6 16 x 25 x 6 18 x 24 x 6 20 x 20 x 6 20 x 24 x 6 20 x 25 x 6 24 x 24 x 6 11 posts, read 152,619 times 433 posts, read 1,607,992 times 10,513 posts, read 22,544,338 times 857 posts, read 3,847,387 times 3,020 posts, read 20,105,444 times Probably no standard answer...... So much depends on your exact situation. Do you have the most use in trying or heat or cool. Which is more critical for you.

How well is the system designed, how big are the ducts, how much dirt in the house, does the additional filter have any negative effects. Probably not a one size fits all. Mine the return ducts are huge. Have had a filter cloth type bootie over the returns. Zero negative effects on operation. Probably going to build in the ability to put a another standard filter right at the return register. I do not want to mess around ever trying to clean those ducts again. Dog hairs are not easy to catch. Mine is just a heating system. Some homes like the mobiles, the entire return air system was a disaster. Cheap flimsy thin flex type ducts installed under the floor, too small. Many folks modified the systems so there was no return ducts, cut a hole in the utility room door and put in a screen, added a filter there. Lot of those type systems came with a filter installed on each return. So much of it is so dependent on how something was built / being operated today. What are the alternatives if you are having some type of problem.