-62%
19 3/4x21 1/2x1 Aerostar Air Filter
$124.99
$199.99
-37%
Last checked 7 hours ago
Get this dealThe 19 3/4 x 21 1/2 x 1 Aerostar fits a return that nominally would be called a 20x22x1 but actually measures 19 3/4" x 21 1/2" x 1". Odd-sized returns like this appear in custom HVAC installations and certain regional construction markets where the original installer didn't size to a standard nominal opening. MERV 8 covers standard residential dust and pollen filtration. MERV 11 handles pet households and most common allergens. MERV 13 captures fine particulates including smoke, bacteria, and virus carriers - 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 actual filtration work. The pleats give you substantially more surface area than a flat fiberglass filter at the same nominal size, extending the service life to a 60-to-90-day window in typical residential conditions....
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