Air Conditioning Filters

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

A 14x25x1 nominal return takes a filter with an actual size of 13 1/2" x 24 1/2" x 3/4", and this Aerostar is built to that specification. The half-inch undersize on each axis is what allows the filter to slide into the grille track without wedging. Three MERV options cover the residential range. MERV 8 is the standard household choice, catching dust, pollen, and lint at the lowest static pressure. MERV 11 picks up where MERV 8 leaves off, handling pet dander, smoke, and most common allergens. M

The 10x10x1 Aerostar pleated filter ships at an actual size of 9 1/2" x 9 1/2" x 3/4", which is the trade-standard undersize for a nominal 10x10x1 return. That gap matters: a true 10-inch filter won't seat in a 10-inch grille, and an oversized one tears its frame trying. Three MERV grades cover the typical residential range. MERV 8 handles standard dust, lint, and pollen for households without specific air quality concerns. MERV 11 steps up for pet dander, mold spores, and finer dust if you've g

Direct replacement for the Carrier 13x21 1/2x1 OEM filter spec, sized at an actual 12 7/8" x 21 1/2" x 3/4". This is the filter that ships on a range of older Carrier and Bryant residential systems, and the OEM-branded refill is one of the more expensive consumables in the Carrier parts catalog given the odd nominal dimensions. Aerostar's pleated equivalent meets the dimensional spec without modification. MERV 8 covers standard household filtration: dust, lint, pollen. MERV 11 handles pet househ

The 24x24x4 Aerostar measures 23 3/8" x 23 3/8" x 3 3/4" actual, sized for both commercial and residential applications with a 4-inch filter slot. Square 24x24 returns in this depth are common spec on commercial rooftop units and certain residential whole-house media housings. The 4-inch depth is where pleated filtration earns its position: substantially more media than a 1-inch holds, much lower pressure drop, and service life measured in months rather than weeks. MERV 8 covers baseline commerc

Pure Gold Replacement Filter Pack

The Aerostar 20x25x5 Replacement Air Filter for Honeywell FC100A1037 Air Systems features a multi-model fit design (see Additional Specifications for full model list) and is available in multiple MERV filtration levels to suit your lifestyle and needs.

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

The Aerostar 20x20x5 Replacement Air Filter for Honeywell FC100A1011 and Lennox X0585 Air Systems features a multi-model fit design (see Additional Specifications for full model list) and is available in multiple MERV filtration levels to suit your lifestyle and needs.

The Aerostar 19x20x4 Replacement Air Filter for Bryant Carrier FILCCFNC0021 Air Systems features a multi-model fit design (see Additional Specifications for full model list) and is available in multiple MERV filtration levels to suit your lifestyle and needs.

The Aerostar 16x20x5 Replacement Air Filter for Honeywell FC100A1003 Air Systems features a multi-model fit design (see Additional Specifications for full model list) and is available in multiple MERV filtration levels to suit your lifestyle and needs.

The Aerostar 20x25x5 Replacement Air Filter for Honeywell FC100A1037 Air Systems features a multi-model fit design (see Additional Specifications for full model list) and is available in multiple MERV filtration levels to suit your lifestyle and needs.

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

At an actual 19 7/8" x 21 1/2" x 3/4", the 20 x 21 1/2 x 1 Aerostar fits a return that doesn't conform to a standard nominal size - common in custom builds and certain regional HVAC markets where the installer specified a non-standard grille opening. MERV 8 handles baseline residential filtration. MERV 11 covers pet households and mild allergy concerns. MERV 13 captures fine particulates including bacteria, virus-carrying droplets, and wildfire smoke - the grade for households with respiratory h

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

Direct replacement for the Carrier 13x21 1/2x1 OEM filter spec, sized at an actual 12 7/8" x 21 1/2" x 3/4". This is the filter that ships on a range of older Carrier and Bryant residential systems, and the OEM-branded refill is one of the more expensive consumables in the Carrier parts catalog given the odd nominal dimensions. Aerostar's pleated equivalent meets the dimensional spec without modification. MERV 8 covers standard household filtration: dust, lint, pollen. MERV 11 handles pet househ

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

At 23 3/4" x 35 3/4" x 3/4" actual, the 24x36x1 Aerostar fits a nominal 24x36x1 return. This is a larger residential or small commercial size, common on furnaces serving big homes and on some commercial rooftop units that use a 1-inch slot rather than deeper media. Three MERV grades cover the typical filtration range. MERV 8 for baseline dust and pollen filtration. MERV 11 for pet households and mild allergy concerns. MERV 13 for fine particulate capture including smoke, bacteria, and virus-size

Lasko’s Pure Platinum Air Purifier uses 3-stage filtration to remove smoke, odors, dust, allergens and more from the air. Stage 1 - Carbon filter: Removes smoke, cooking and household odors. Captures dust, pet hair and other large particles. Lasts up to 4 months. Extends filter life. Stage 2 - Pleated Filter: Removes 99% of airborne irritants (as small as 0.3 microns). Lasts up to 12 Months. Stage 3 - TiO2 filter with long-life UV light: Helps eliminate mold, bacteria and viruses. Removes odors and fumes from cleaners, aerosols, carpet and paint. Lasts up to 12 months.

Blueair Carbon + filter for PRO series filters

At an actual 21 1/2" x 23 1/2" x 3/4", the 21 1/2 x 23 1/2 x 1 Aerostar fits a custom-spec nominal opening common in certain regional HVAC markets. MERV 8 covers standard household filtration: dust, lint, pollen. MERV 11 handles pet households and most common allergens. MERV 13 captures fine particulates including bacteria, virus-carrying droplets, and wildfire smoke - the grade to choose for households with respiratory health issues. Pleated synthetic media with an electrostatic charge built in

A 14x25x1 nominal return takes a filter with an actual size of 13 1/2" x 24 1/2" x 3/4", and this Aerostar is built to that specification. The half-inch undersize on each axis is what allows the filter to slide into the grille track without wedging. Three MERV options cover the residential range. MERV 8 is the standard household choice, catching dust, pollen, and lint at the lowest static pressure. MERV 11 picks up where MERV 8 leaves off, handling pet dander, smoke, and most common allergens. M

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

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