How do I figure out my furnace filter size?

Furnace filters are sized by width, length and thickness. The size on the filter is usually expressed in inches (example: 16″x20″x1″). A filter that is the wrong size will typically not fit, or may not stay in place, once installed. The owner’s manual for your furnace should tell you what size you need.

How often should you change a 1 inch furnace filter?

In general, this is how often changing furnace filters needs to be done: For 1- to 2-inch filters, replace them every 1 to 3 months. For 3- to 4-inch filters, replace them every 6 to 9 months. For 5- to 6-inch filters, replace them every 9 to 12 months.

Can you double a furnace filter?

Bottom Line: Putting two filters will not make it last longer but may make you have to replace it earlier, assuming it doesn’t already reduce air flow too much with just the filters.

Where is the filter in my furnace?

The furnace filter is usually located inside of the blower compartment, where the return air enters the blower compartment.

How often should you change your furnace filter?

The basic consensus among HVAC professionals is that you should replace your furnace filter every 90 days — or every three months. However, that depends on the filter’s thickness. Thicker filters have more room to collect dirt and dust, so they don’t have to be changed as often.

Why does my furnace filter get dirty so fast?

One-inch pleated filters quickly get dirty because they’re designed to catch more airborne contaminants. Think of 1-inch pleated air filters as a fine fish net with a very small gaps: it catches everything from big to small fish, but that also means the net fills up with fish faster (say that 3 times fast).

How big is a 20×24 air filter?

Heating, Venting & Cooling Air Filters 20×24 Air Filters Air Filter Size: 12×24 Air Filter Size: 20×25 Honeywell Filter Performance Rating (FPR): 10 – Premium Filter Performance Rating (FPR): 4-5 – Good Filter Performance Rating (FPR): 6-7 – Better 38ResultsAir Filter Size: 20x24Air Filter Depth (in.): 1Clear All

How big is a filtrete furnace air filter?

The Filtrete AC Furnace Air Filter 2-Pack is designed to fit in standard 20 x 24 x 1.5-inch AC receptacles. The Filtrete AC Furnace Air Filter 2-Pack is designed to fit in standard 20 x 24 x 1.5-inch AC receptacles. .

Which is the best air filter for AC and furnace?

FilterBuy 20x24x1 MERV 13 Air filters (AFB Platinum). AC, HVAC, Furnace Filters. (not from MERV 8) from FilterBuy on Vimeo

What to look for in an air filter?

Choose an air filter that pulls in dust and pollen, odors, allergens, or bacteria and viruses. And we have various sizes to ensure your filter fits properly. Once you’re done shopping our air filter home collection, be sure to look into our air filter choices for commercial spaces as well.