Is the Aerostar 20x30x2 actually 20 by 30 inches?

No. Like most furnace filters, the size is nominal. The actual filter is about 19.75 by 29.75 by 1.75 inches, so measure your slot before ordering.

What does MERV 8 filter out?

MERV 8 captures pollen, dust mites, lint, mold spores and pet dander. It does not capture fine smoke or virus-sized particles the way MERV 13 does.

Every 1 to 3 months for most homes. Change it more often with pets, heavy dust or continuous fan operation.

No. This is a 2-inch filter. A 1-inch slot needs a 1-inch filter, or the grille will not close.

That is the best new price across 5 stores as of November 7, 2026, at airfiltersdelivered.com. Compare per-filter cost if you buy multipacks.

Yes, if the slot takes a 20x30x2 filter. It is not tied to a specific furnace or AC brand.

At airfiltersdelivered.com, for $58.99, as of our latest check.

Rated 4.5 out of 5 from 1,600 ratings.

5 stores we checked sell it, including The Home Depot, Best Buy, eBay, airfiltersdelivered.com, AeroStar.

$58.99at airfiltersdelivered.comObserved at 9:52 PM

Compared across 5 stores. Prices are checked against each store and labelled with when.

It checks today's price at every store, compares the alternatives and answers in about a minute.