Air Conditioning Filters

These 12.25x15x2 air filters are right-sized for your needs. Choose the MERV rating that suits your lifestyle and breathe cleaner air.

The Aerostar 20x20x2 pleated air filter delivers clean air by replacing your air system's vent intake filter. Designed to work with most home and office AC and furnace systems with compatible intake vent sizes, filtering out dust, pollen, bacteria, and other airborne particles. Great indoor air quality is as easy as changing your air filter to Aerostar.

The Aerostar 18x22x1 pleated air filter delivers clean air by replacing your air system's vent intake filter. Designed to work with most home and office AC and furnace systems with compatible intake vent sizes, filtering out dust, pollen, bacteria, and other airborne particles. Great indoor air quality is as easy as changing your air filter to Aerostar.

Picking a 12x30x1 means you've got a long, narrow return - common on older furnaces and certain horizontal air handler installs. The actual size of this Aerostar is 11 1/2" x 29 1/2" x 3/4", so it'll seat properly in a nominal 12x30x1 grille without forcing the frame. Three MERV grades match the filter to the household. MERV 8 for baseline dust and pollen at lowest airflow restriction. MERV 11 for households with pets, smokers, or mild allergies. MERV 13 for fine particulate filtration including

Actual dimensions on the 12x18x1 Aerostar come in at 11 3/4" x 17 3/4" x 3/4", so the filter drops into a nominal 12x18x1 return without binding against the grille edges. That tighter actual size is what filter manufacturers have used for decades, and it's why measuring your existing filter rather than your return opening is the only reliable way to verify fit. Available in MERV 8 for standard household dust and pollen, MERV 11 for pet owners and mild allergy households, and MERV 13 if you're fi

These 20x22x2 air filters are right-sized for your needs. Choose the MERV rating that suits your lifestyle and breathe cleaner air.

The 16x25x4 Aerostar is designed as a replacement for Lennox deep-pleat air filter cabinets, sized at an actual 15 1/2" x 24 1/2" x 4 1/4". Lennox whole-house media filter housings run on a 4-inch slot, and the Lennox-branded refill through a dealer is substantially more expensive than this Aerostar equivalent, with the same pleated media construction and the same dimensional fit. MERV 8 covers baseline residential filtration: dust, lint, pollen. MERV 11 handles pet households and mild allergy c

The 16 1/4 x 21 1/2 x 1 Aerostar is sized for a nominal opening that's one of the harder filter dimensions to source through retail channels. Actual size is 16 1/2" x 21 1/2" x 3/4". Custom and semi-custom HVAC installations often spec dimensions like this where the return opening doesn't match a standard nominal size. Three MERV grades cover the residential range. MERV 8 for baseline dust, lint, and pollen filtration. MERV 11 for pet households and mild allergy concerns. MERV 13 for fine partic

These 21.25x23.25x1 air filters are right-sized for your needs. Choose the MERV rating that suits your lifestyle and breathe cleaner air.

These 18x36x2 air filters are right-sized for your needs. Choose the MERV rating that suits your lifestyle and breathe cleaner air.

The Aerostar 20x25x2 pleated air filter delivers clean air by replacing your air system's vent intake filter. Designed to work with most home and office AC and furnace systems with compatible intake vent sizes, filtering out dust, pollen, bacteria, and other airborne particles. Great indoor air quality is as easy as changing your air filter to Aerostar.

The Aerostar 16x20x2 pleated air filter delivers clean air by replacing your air system's vent intake filter. Designed to work with most home and office AC and furnace systems with compatible intake vent sizes, filtering out dust, pollen, bacteria, and other airborne particles. Great indoor air quality is as easy as changing your air filter to Aerostar.

The Aerostar 12x16x1 pleated air filter delivers clean air by replacing your air system's vent intake filter. Designed to work with most home and office AC and furnace systems with compatible intake vent sizes, filtering out dust, pollen, bacteria, and other airborne particles. Great indoor air quality is as easy as changing your air filter to Aerostar.

These 10x12x1 air filters are right-sized for your needs. Choose the MERV rating that suits your lifestyle and breathe cleaner air.

The Aerostar 20x20x2 pleated air filter delivers clean air by replacing your air system's vent intake filter. Designed to work with most home and office AC and furnace systems with compatible intake vent sizes, filtering out dust, pollen, bacteria, and other airborne particles. Great indoor air quality is as easy as changing your air filter to Aerostar.

The Aerostar 20x24x1 pleated air filter delivers clean air by replacing your air system's vent intake filter. Designed to work with most home and office AC and furnace systems with compatible intake vent sizes, filtering out dust, pollen, bacteria, and other airborne particles. Great indoor air quality is as easy as changing your air filter to Aerostar.

These 8.875x19.125x1 air filters are right-sized for your needs. Choose the MERV rating that suits your lifestyle and breathe cleaner air.

These 9x9x1 air filters are right-sized for your needs. Choose the MERV rating that suits your lifestyle and breathe cleaner air.

These 20x21.5x2 air filters are right-sized for your needs. Choose the MERV rating that suits your lifestyle and breathe cleaner air.

At 17 3/4" x 29 3/4" x 3/4" actual, the 18x30x1 Aerostar fits a nominal 18x30x1 return. Long-rectangle returns like this are typical on older furnace cabinets and some horizontal air handlers. Three MERV grades cover the residential range. MERV 8 is your baseline - dust, lint, pollen, no special filtration requirements. MERV 11 steps up for pet households or homes with mild allergy concerns. MERV 13 captures fine particulates including smoke, bacteria, and virus carriers, the grade to pick for h

Built for HVAC returns calling for a nominal 10x20x1, this Aerostar filter measures an actual 9 1/2" x 19 1/2" x 3/4". The smaller actual size is intentional and standard across the filter industry, giving the filter room to slide into the grille without binding. Pick your MERV based on what you're actually trying to catch. MERV 8 covers everyday dust, lint, and pollen at the lowest airflow resistance. MERV 11 handles pet dander, smoke, and most household allergens. MERV 13 traps fine particulat

The Aerostar 20x30x1 pleated air filter delivers clean air by replacing your air system's vent intake filter. Designed to work with most home and office AC and furnace systems with compatible intake vent sizes, filtering out dust, pollen, bacteria, and other airborne particles. Great indoor air quality is as easy as changing your air filter to Aerostar.

At 19 3/4" x 35 3/4" x 3/4" actual, the 20x36x1 Aerostar fits a nominal 20x36x1 return. Long-rectangle returns in this size show up on larger residential air handlers and some commercial applications. Three MERV grades cover the standard residential range. MERV 8 for baseline household dust and pollen filtration - the standard choice without pets or specific allergy concerns. MERV 11 for pet households, smoke residue, and most common allergens. MERV 13 for fine particulate capture including bact

These 20x23x1 air filters are right-sized for your needs. Choose the MERV rating that suits your lifestyle and breathe cleaner air.