factorydirectfilters.com · www.factorydirectfilters.com
21x23x1 Aerostar Air Filter
MERV 8 / 6
4.9 out of 5 · 388 ratings
$78.48 at factorydirectfilters.com right now, from Shopify.
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Reviews
Rated 4.9 out of 5 by 388 shoppers.
Sinclair
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About this product
A 21x23x1 nominal opening is one of those odd sizes that retail stores don't stock, which is why most homeowners end up ordering direct. This Aerostar measures 20 7/8" x 22 7/8" x 3/4" actual, built to fit the nominal 21x23x1 grille without binding or air bypass. MERV 8 covers standard residential filtration: dust, lint, pollen. MERV 11 steps up for pet households or homes with mild allergy concerns. MERV 13 captures fine particulates including bacteria, virus carriers, and wildfire smoke - the grade to choose if anyone in the household has asthma or chronic respiratory health concerns. Pleated synthetic media with an electrostatic charge handles the filtration. The pleats give you 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 built into the synthetic fibers catches sub-micron particles that the physical weave alone would miss. Manufactured by Con-Air Industries in Orlando, Florida. The cardboard frame is reinforced to maintain shape under blower suction - one of the more common failure modes in cheaper filters is frame collapse, which allows unfiltered air to bypass the media entirely.
- 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.
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How Sinclair checks, and what the verdicts mean
TrueFinds 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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