18x20x4 Accumulair Furnace Filter Merv 8

18x20x4 (17.5x19.5x3.75) APR 650

Accumulair Replacement Filter

$19.79

  • MERV 8 Rating
  • Each filter lasts up to 3 months.
  • Electrostatic charge captures airborne allergens SMALLER THAN 1 micron including fine dust, smoke, dander, mold, pet dander and dust mites. Also traps most large allergens including pollen and lint.
Designed for uniform air flow.
Will not support the growth of bacteria, mold, mildew or fungi in normal use.
    Merv 8 furnace filters and AC filters can remove indoor air contaminants such as pollen, dust, lint, dust mites debris and pet dander. Electrostatic HVAC filters are different than regular home air filters. Negative and positive charges in the filter fibers attract dust and other airborne particles. This helps keep your home's air cleaner and safer for you and your family's long-term health. Up to 90% of our lives is spend indoors, potentially breathing in mold, pet dander, secondhand smoke, household cleaning products and more. This is part of why the EPA named Indoor Air Quality (IAQ) as one of the top 5 environmental health risks. Change your home air filters every 90 days or sooner to avoid the short-term and long-term negative health effects of breathing dirty air.
  • Type Furnace Filter
  • Item# FB18X20X4
  • Brand Accumulair
  • Size 18x20x4
  • Actual 17.5x19.5x3.75

More Filters This Size (17.5x19.5x3.75)

  • APR 1950
$26.39
  • APR 1550
$22.43
  • Carbon
$26.39
Important Information


The manufacturer has discontinued the MERV 6 / APR 450 filters from their line up, our suggested replacement is the MERV 8 / APR 650 Gold filter, you may see the Emerald MERV 6 / APR 450 still on the website, we are actively removing that MERV/APR


** The typical ship time for orders is now around 15 to 20 business days **

Ok, got it

Newsletter Signup

Sign up to join our mailing list and be the first to hear about special pricing, new products, and tips to get the most out of your filters!

You can also sign up for our email reminders to change your filter here

No thanks, I'd rather not