Air Conditioning Filters

Need a 12x20x1 that actually fits your return? This Aerostar comes in at 11 1/2" x 19 1/2" x 3/4", matching the real opening in most furnace and air handler returns where a nominal 12x20x1 is specified. The half-inch undersize on each dimension is industry standard and keeps the filter from wedging in the grille track. Three MERV options let you match the filter to what your household actually needs. MERV 8 covers basic dust, pollen, and lint at the lowest static pressure. MERV 11 captures pet d

The Aerostar 20x22x1 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 16x24x1 Aerostar measures 15 1/2" x 23 1/2" x 3/4" actual, sized for a nominal 16x24x1 return. Common spec on mid-sized residential furnaces and air handlers, and one of the higher-volume filter sizes in the U.S. residential market. Available in MERV 8 for standard households, MERV 11 for pet owners and mild allergy households, and MERV 13 for fine particulate filtration including smoke and virus-carrying aerosols. The pleated synthetic media construction gives this filter substantially more

These 12x14x1 air filters are right-sized for your needs. Choose the MERV rating that suits your lifestyle and breathe cleaner air.

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 19.5x19.5x1 air filters are right-sized for your needs. Choose the MERV rating that suits your lifestyle and breathe cleaner air.

Blueair 500 and 600 Series Particle Filter with Carbon Sheet set of 3

The Aerostar 15x25x1 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.

Blueair Particle filter for PRO series

These 21.5x23.3125x1 air filters are right-sized for your needs. Choose the MERV rating that suits your lifestyle and breathe cleaner air.

The Aerostar 24x24x2 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 14x18x1 Aerostar fits a nominal 14x18x1 return at an actual size of 13 3/4" x 17 3/4" x 3/4". Choose your MERV based on the air quality concern you're actually solving for. MERV 8 covers baseline dust, lint, and pollen for standard households without pets or allergy issues. MERV 11 handles pet dander, mold spores, and smoke residue - the typical step-up for homes with cats or dogs. MERV 13 captures fine particulates down to the virus-carrier range, which matters during wildfire season or for

These 8.75x35.625x1 air filters are right-sized for your needs. Choose the MERV rating that suits your lifestyle and breathe cleaner air.

A nominal 22x24x1 return takes a filter at 21 7/8" x 23 7/8" x 3/4" actual, sized to drop into the grille without binding. This is another size that doesn't appear at most retail outlets, which is one of the reasons odd-size buyers end up ordering direct from manufacturers. MERV 8 handles standard residential dust and pollen filtration. MERV 11 captures pet dander, smoke residue, and most common household allergens. MERV 13 covers fine particulates including bacteria, virus-carrying droplets, an

These 21x21x2 air filters are right-sized for your needs. Choose the MERV rating that suits your lifestyle and breathe cleaner air.

These 21.25x23.25x2 air filters are right-sized for your needs. Choose the MERV rating that suits your lifestyle and breathe cleaner air.

These 21.25x21.25x2 air filters are right-sized for your needs. Choose the MERV rating that suits your lifestyle and breathe cleaner air.

These 16.5x21.625x2 air filters are right-sized for your needs. Choose the MERV rating that suits your lifestyle and breathe cleaner air.

These 16.5x21.5x2 air filters are right-sized for your needs. Choose the MERV rating that suits your lifestyle and breathe cleaner air.

The 20x24x2 Aerostar measures 19 3/8" x 23 3/8" x 1 3/4" actual. A 2-inch filter in a nominal 20x24 slot was common spec on older residential furnaces and remains widely used in light commercial systems. Two-inch depth means roughly twice the debris-holding capacity of a 1-inch equivalent and a noticeably lower pressure drop across the filter face. MERV 8 covers baseline residential filtration. MERV 11 handles pet dander, smoke residue, and most household allergens. MERV 13 captures fine particu

The 24x30x1 Aerostar fits a nominal 24x30x1 return at 23 7/8" x 29 7/8" x 3/4" actual. Larger-residential and small-commercial returns in this size show up on furnaces serving 2,500-plus square foot homes and on some compact commercial air handlers. MERV 8 covers baseline residential filtration: dust, lint, pollen. MERV 11 captures pet dander, smoke residue, and most common household allergens. MERV 13 handles fine particulates including bacteria, virus carriers, and wildfire smoke - the grade t

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 16x21x2 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.