• No minimums, no surprises — we ship every order for free! We'll get your filters out the door fast so you can enjoy clean air and water without paying extra.

  • Shop with confidence! If you're not completely satisfied with your purchase, you have up to one year to return it for a refund or exchange. We stand behind every filter we sell.

    Learn More

  • Every order is carefully packed and shipped by our team in Indiana. Your purchase helps support American jobs and hardworking families right here in the Midwest. Our AIRx Furnace / AC Filters and ClearChoice Fridge Filters are made in the USA.

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  • No minimums, no surprises — we ship every order for free! We'll get your filters out the door fast so you can enjoy clean air and water without paying extra.

  • Shop with confidence! If you're not completely satisfied with your purchase, you have up to one year to return it for a refund or exchange. We stand behind every filter we sell.

    Learn More

  • Every order is carefully packed and shipped by our team in Indiana. Your purchase helps support American jobs and hardworking families right here in the Midwest. Our AIRx Furnace / AC Filters and ClearChoice Fridge Filters are made in the USA.

Cart 0

We don't know what's in your water,
but we know there's nothing in your cart.

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Space-Gard 401 Air Filters

Showing 1 -  14 of 14 Products
BestAirPro Replacement for Aprilaire® # 401 Filter, 2-Pack
$32.48 / Filter
$40.60 Save 20%!
Original Aprilaire #401 Filter For 2400 Air Cleaner, 2-Pack
$54.98 / Filter
$68.72 Save 20%!
16x28x6 AIRx DUST Aprilaire 401 Replacement Air Filter - MERV 8, 2-Pack
$37.48 / Filter
$46.85 Save 20%!
16x28x6 AIRx ALLERGY Aprilaire 401 Replacement Air Filter - MERV 11, 2-Pack
$42.48 / Filter
$53.10 Save 20%!
16x28x6 AIRx HEALTH Aprilaire 401 Replacement Air Filter - MERV 13, 2-Pack
$54.98 / Filter
$68.72 Save 20%!
16x28x6 AIRx ODOR Aprilaire 401 Replacement Air Filter - Carbon, 2-Pack
$54.98 / Filter
$68.72 Save 20%!
Filter Upgrade Kit for Aprilaire/Space-Gard 2400 Air Cleaner
$109.95 / Kit
$137.44 Save 20%!
Aprilaire 4270 Pleat Spacers for 2400/5000 Air Cleaner
$23.33 / Pleat Spacer
$29.16 Save 20%!
Honeywell PopUP 2400 Media for Aprilaire/Space-Gard 2400 Air Cleaner, 2-Pack
$59.98 / Filter
$74.97 Save 20%!
Honeywell PopUP 2400 Media for Aprilaire/Space-Gard 2400 Air Cleaner
$64.95 / Filter
$81.19 Save 20%!
16x28x6 AIRx DUST Aprilaire 401 Replacement Air Filter - MERV 8
$49.95 / Filter
$62.44 Save 20%!
16x28x6 AIRx HEALTH Aprilaire 401 Replacement Air Filter - MERV 13
$64.95 / Filter
$81.19 Save 20%!
16x28x6 AIRx ODOR Aprilaire 401 Replacement Air Filter - Carbon
$64.95 / Filter
$81.19 Save 20%!
16x28x6 AIRx DUST Aprilaire 401 Replacement Air Filter - MERV 8, 4-Pack
$34.99 / Filter
$43.74 Save 20%!
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What Our Customers Have to Say

Byron L. 1 day ago
5
I can always count on your product the shape it's in the quickness reliability and you stand behind your product And it's easy to reorder I've been using it for years with no problems I highly recommend them
Dinesh A. 1 day ago
5
East to use and great product to close the fitter opening.
Bruce W. 1 day ago
5
Love the filter. Had horrible time getting them without UPS crushing them!
James W. 1 day ago
5
I appreciate Discount Filters. Thank you.