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"Excellent air filters. Perfect fit. Packaging arrives on time in perfect condition. No problems with this Company. Just order what you need and forget. The rest is done for you."
Measuring Length and Width (L x W). (If your filter is not a square, the smallest measurement goes first).
Measure the thickness (Depth) of your filter from front to back.
Put Your measurements together (L x W x D).
A filter’s true dimensions.
Example: 19.75” x 19.75” x 1”
Rounded numbers used by manufacturers.
Example 20” x 20” x 1”
View Detailed InstructionsA 20 x 21 5/8 x 1 nominal return is one of those odd specs that comes from a custom or semi-custom HVAC installation. This Aerostar measures 20" x 21 5/8" x 1" actual, built to the exact spec without adjustment. MERV 8 covers standard residential filtration: dust, lint, pollen. MERV 11 handles pet households and mild allergy concerns. MERV 13 captures fine particulates including smoke, bacteria, and virus carriers - the recommended grade for households with asthma or chronic respiratory health issues. Pleated synthetic media with an electrostatic charge built into the fibers handles the filtration work. The pleats provide several times the surface area of a flat fiberglass filter at the same nominal size, which extends the service life to a 60-to-90-day window under typical residential conditions. The electrostatic charge catches sub-micron particles where mechanical filtration alone reaches its physical limits. Manufactured in the USA by Con-Air Industries at the Orlando, Florida facility. Cardboard frame, reinforced to maintain shape under blower suction. Custom-spec filters benefit most from dimensional precision because an off-spec filter leaves a gap where unfiltered air bypasses the media, which defeats the purpose of running any MERV grade above the baseline.
Pleated MERV 11 Media
Comparable to MPR 1000 to 1200 and FPR 7
Designed for Superior Filtration Efficiency
Made with electrostatically charged synthetic material that draws and captures allergens between 1 - 10 microns, including lint, dust mites, mold spores, pollen, pet dander, dust, and smoke.
Improve Indoor Air Quality
Protect your family and loved ones with clean indoor air quality at home. Aerostar filters are a simple and cost effective step towards a healthier home environment, free of airborne allergens and particles that can trigger various allergy and asthma symptoms.
Improve Efficiency and Reduce Cost
An Aerostar furnace air filter helps keep your HVAC unit working efficiently by removing dirt and reducing strain on the motor. When your unit runs properly, it consumes less energy, requires less maintenance and will have a longer life. These factors will have an impact on your utility bill and maintenance costs. It is recommended that you change the filter every 60 to 90 days during normal times of year but increase frequency to 30 days during peak summer and winter months when your unit is working the hardest.
About Aerostar Furnace Air Filters
Aerostar filters are manufactured in the USA by Filtration Group, a world-leading manufacturer and supplier of filtration solutions for residential, commercial and industrial applications. The Aerostar brand is known for constantly innovating and improving their technology to help make filtration more efficient, effective and environmentally friendly every day.
About MERV, MPR and FPR Rating
The three rating systems were created by different organizations. MERV is the domestic and international Industry Standard rating system established by the American Society of Heating, Refrigerating, and Air Conditioning Engineers. The other two rating systems were created by 3M and The Home Depot, but all are rating the same filter.
MERV Rating (Minimum Efficiency Reporting Value): As you have already learned, the MERV Rating is the primary rating system used in the industry, both domestically and internationally. Established by the American Society of Heating, Refrigerating, and Air Conditioning Engineers, MERV rates a filter’s ability to capture and hold particles and pollutants.
MPR (Micro-Particle Performance Rating): MPR Rating is a rating system developed by 3M. It rates the manufacturer’s Filtrete product line and their ability to capture airborne particles smaller than 1 micron.
FPR (Filter Performance Rating): FPR Rating is a rating system developed by The Home Depot for brands sold through their stores, including Honeywell. It utilizes a color code and number scale (4 to 10) that closely resembles the MERV rating.
MERV ratings let you know the efficiency and level of filtration that an air filter can handle under normal circumstances. The higher the MERV rating, the finer the particles are that are filtered our of the air in your home. Many air filter retailers use MERV or a similar rating to rate their air filters.
MERV Rating is the primary rating system used in the industry, both domestically and internationally. Established by the American Society of Heating, Refrigerating, and Air Conditioning Engineers, MERV rates a filter’s ability to capture and hold particles and pollutants.
MPR Rating is a rating system developed by 3M. It rates the manufacturer’s Filtrete product line and their ability to capture airborne particles smaller than 1 micron.
FPR Rating is a rating system developed by The Home Depot for brands sold through their stores, including Honeywell. It utilizes a color code and number scale (4 to 10) that closely resembles the MERV rating.
Overall rating: 4.5 / 5 from 2 reviews.
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"Excellent air filters. Perfect fit. Packaging arrives on time in perfect condition. No problems with this Company. Just order what you need and forget. The rest is done for you."
"Item seems made well and fits unit well. Also easy to order on site with timely delivery. Only wish measurements were stenciled on filter as well as a “would be nice to have” stencil of site to order."
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