factorydirectfilters.com · www.factorydirectfilters.com
21 1/2x21 1/2x1 Aerostar Air Filter
MERV 8, 6
4.8 out of 5 · 76 ratings
$85.02 at factorydirectfilters.com right now, from Shopify.
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Price
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Return policyProduct details
Photos and details from the store, through Shopify.
Reviews
Rated 4.8 out of 5 by 76 shoppers.
Sinclair
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About this product
At a true 21 1/2" x 21 1/2" x 3/4", the 21 1/2 x 21 1/2 x 1 Aerostar fits a nominal opening that measures the same in both nominal and actual dimensions - unusual in the filter industry. This is a custom-spec size used in certain regional HVAC markets. MERV 8 handles standard residential dust and pollen filtration. MERV 11 covers pet households and most common allergen concerns. MERV 13 captures fine particulates including smoke, bacteria, and virus-carrying droplets - the grade for households with respiratory issues or in wildfire-affected regions. Pleated synthetic media with an electrostatic charge built into the fibers does the work. The pleats give you substantially more surface area than 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 the physical weave alone reaches its limits. Manufactured by Con-Air Industries in Orlando, Florida. Cardboard frame, reinforced to maintain shape under blower suction. Custom-size returns benefit from precise dimensional matching - this filter is built to the OEM specification without modification, which is what prevents the air bypass gaps that defeat higher MERV grades.
- Pleated paper filter design: Enhances filtration efficiency by trapping airborne particles
- Disposable construction: Simplifies maintenance and replacement for users
- Compatible with most AC and furnace systems: Offers broad usability for home and office environments
- Removes dust, pollen, and bacteria: Supports healthier indoor air quality
- Available in multiple sizes: Ensures a precise fit for various vent intake requirements
- Filter Material
- Paper
- Filter Type
- Pleated
- Usage Type
- Disposable
- Compatible Systems
- Most home and office AC and furnace systems
- Available Sizes
- 12x12x1 in, 14x14x1 in, 14x20x1 in, 16x16x1 in, 16x20x1 in, 16x25x1 in, 20x20x1 in, 20x25x1 in, 20x30x1 in, 20x35x1 in, 25x25x1 in, 25x30x1 in, 30x30x1 in
- Color
- White, Blue, Green
Photos, details and ratings from factorydirectfilters.com, through Shopify.
How Sinclair checks, and what the verdicts mean
True Finds records factorydirectfilters.com's prices once a day, with permission through the store's affiliate network. This verdict comes from that record alone.
- GENUINE DEAL
- A real low. Good time to buy.
- INFLATED
- Not a real discount. The 'was' price is not what this really sells for.
- TYPICAL PRICE
- Normal price. Fine to buy if you need it.
- NOT ENOUGH DATA
- Too new to judge. Not enough price history yet.
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