Shop DIY Air Filter This Old House

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$79.30
16X25x5 Furnace & Whole House Air Filter For Air Bear MERV 11 / 2
Air Filters Delivered
$79.30
16X25x5 Furnace & Whole House Air Filter For Air Bear MERV 11 / 2
Air Filters Delivered
$40.99
16X20x1 Aerostar Air Filter MERV 11 + Carbon / 2
Air Filters Delivered
$40.99
16X20x1 Aerostar Air Filter MERV 11 + Carbon / 2
Air Filters Delivered
$93.11
20X36x2 Aerostar MERV 8 Air Filter, 2 Pack, Standard Dust Defense, HVAC AC Furnace Filters
Air Filters Delivered
$93.11
20X36x2 Aerostar MERV 8 Air Filter, 2 Pack, Standard Dust Defense, HVAC AC Furnace Filters
Air Filters Delivered
$119.00
Buy 3 Get 1 FREE - Ionic Air Purifier Special Offer 2025
Lab Charge Air Purifiers
$119.00
Buy 3 Get 1 FREE - Ionic Air Purifier Special Offer 2025
Lab Charge Air Purifiers
$69.99
4-PACK Replacement Filter For MA Air Purifier -40, 40E Series | 3 in 1 Genuine H13 Filter
Amazon.com
34
Free shipping
$69.99
4-PACK Replacement Filter For MA Air Purifier -40, 40E Series | 3 in 1 Genuine H13 Filter
Amazon.com
$399.95
Lennox Healthy Climate Lennox X6675 20X25x5 Air Filter, Healthy Climate Carbon Clean Merv 16 Home Furnace Filter For HVAC System 4 Pack With
Amazon.com
351
Free shipping
$399.95
Lennox Healthy Climate Lennox X6675 20X25x5 Air Filter, Healthy Climate Carbon Clean Merv 16 Home Furnace Filter For HVAC System 4 Pack With
Amazon.com
$150.00
5Pcs Ionic Filterless Air Purifiers For Home - Large Rooms Or Bedrooms. Best Air Purifier For Allergies, Mold, Dust & Smoke | Labcharge
Lab Charge Air Purifiers
$150.00
5Pcs Ionic Filterless Air Purifiers For Home - Large Rooms Or Bedrooms. Best Air Purifier For Allergies, Mold, Dust & Smoke | Labcharge
Lab Charge Air Purifiers
$99.98
$121.90
110 Aprilaire MERV 11 Replacement Whole-House Air Purifier Filter By Aprilaire, 2 Pk | Furnace & AC Filter | Pleated"
Discount Filters
17% off
$99.98
$121.90
110 Aprilaire MERV 11 Replacement Whole-House Air Purifier Filter By Aprilaire, 2 Pk | Furnace & AC Filter | Pleated"
Discount Filters
$119.00
$260.00
Buy 3 Get 1 FREE - Ionic Air Purifier Special Offer 2025
Lab Charge Air Purifiers
54% off
$119.00
$260.00
Buy 3 Get 1 FREE - Ionic Air Purifier Special Offer 2025
Lab Charge Air Purifiers
$36.00
Sub-Zero Air Purification Cartridge 7042798 7007067 1PACK
subzeroshop
$36.00
Sub-Zero Air Purification Cartridge 7042798 7007067 1PACK
subzeroshop
$87.60
$109.61
201 Aprilaire MERV 11 Replacement Whole-House Air Purifier Filter By Bestairpro, 4 Pk | Furnace & AC Filter | Pleated"
Discount Filters
20% off
$87.60
$109.61
201 Aprilaire MERV 11 Replacement Whole-House Air Purifier Filter By Bestairpro, 4 Pk | Furnace & AC Filter | Pleated"
Discount Filters
$90.24
20X40x1 Air Filters (6-Pack) MERV 8 - Standard / Dust Defense | Pleated, Standard Capacity Replacement Air Filters For HVAC, AC, Furnace
Filter King
$90.24
20X40x1 Air Filters (6-Pack) MERV 8 - Standard / Dust Defense | Pleated, Standard Capacity Replacement Air Filters For HVAC, AC, Furnace
Filter King
$157.00
$183.80
401 Aprilaire MERV 10 Replacement Whole-House Air Purifier Filter By Aprilaire, 4 Pk | Furnace & AC Filter | Pleated"
Discount Filters
14% off
$157.00
$183.80
401 Aprilaire MERV 10 Replacement Whole-House Air Purifier Filter By Aprilaire, 4 Pk | Furnace & AC Filter | Pleated"
Discount Filters
$59.99
K&N HVC-11625: K&N Washable Home Air Filters
Summit Racing
1
$59.99
K&N HVC-11625: K&N Washable Home Air Filters
Summit Racing
$15.03
American Metal Filter Company Duct-Free Universal Air Filter Silver | BPRCP0806
Lowe's
$15.03
American Metal Filter Company Duct-Free Universal Air Filter Silver | BPRCP0806
Lowe's
$4.49
Frost King 15 X 24 X 1 Washable MERV Cut To Fit Air Filter | F1524
Lowe's
76
$4.49
Frost King 15 X 24 X 1 Washable MERV Cut To Fit Air Filter | F1524
Lowe's
$15.00
American Metal Filter Company Universal Air Filter Silver | BPRHF1012
Lowe's
$15.00
American Metal Filter Company Universal Air Filter Silver | BPRHF1012
Lowe's
$249.28
24.75" X 50.375" X 1" Air Filter - 24 3/4" X 50 3/8" X 1" (6-Pack)
FiltersFast.com
$249.28
24.75" X 50.375" X 1" Air Filter - 24 3/4" X 50 3/8" X 1" (6-Pack)
FiltersFast.com
$59.99
K&N HVC-11820: K&N Washable Home Air Filters
Summit Racing
34
$59.99
K&N HVC-11820: K&N Washable Home Air Filters
Summit Racing
$79.99
K&N HVC-13-12020: K&N Washable Home Air Filters
Summit Racing
2K+
$79.99
K&N HVC-13-12020: K&N Washable Home Air Filters
Summit Racing
$769.95
Rabbit Air A3 Ultra Quiet Air Purifier (Odor Remover Filter) - SPA-1000N - Black/Great Wave
Rabbit Air
$769.95
Rabbit Air A3 Ultra Quiet Air Purifier (Odor Remover Filter) - SPA-1000N - Black/Great Wave
Rabbit Air
$769.95
Rabbit Air A3 Ultra Quiet Air Purifier (Toxin Absorber Filter) - SPA-1000N - White/Irises
Rabbit Air
$769.95
Rabbit Air A3 Ultra Quiet Air Purifier (Toxin Absorber Filter) - SPA-1000N - White/Irises
Rabbit Air
$42.00
413 Replacement Air Filter 16X25x4 For Aprilaire Whole House Air Purifiers-MERV 13(1 Pack)
Walmart
12
Free shipping
$42.00
413 Replacement Air Filter 16X25x4 For Aprilaire Whole House Air Purifiers-MERV 13(1 Pack)
Walmart
$36.99
16X20x1 Reusable Air Filter,MERV 8 Electrostatic Aluminum Ac/Hvac Furnace Filter,Washable Permanent Air Filters For Home/Officeeasy To Install, Freshe
Walmart
Free shipping
$36.99
16X20x1 Reusable Air Filter,MERV 8 Electrostatic Aluminum Ac/Hvac Furnace Filter,Washable Permanent Air Filters For Home/Officeeasy To Install, Freshe
Walmart
$44.95
Air-Care 20X25 Electrostatic Flexible Permanent Washable Hvac Furnace Filter, Merv 8
Walmart
1
Free shipping
$44.95
Air-Care 20X25 Electrostatic Flexible Permanent Washable Hvac Furnace Filter, Merv 8
Walmart
$214.99
Amaircare 10000 Whole House Replacement Filters, Moulded / Hepa (Requires 3 Hepas) At The Air Purifier Store
TheAirPurifierStore
$214.99
Amaircare 10000 Whole House Replacement Filters, Moulded / Hepa (Requires 3 Hepas) At The Air Purifier Store
TheAirPurifierStore
$128.83
14X20X2 Lifetime Washable Electrostatic AC / Furnace Filter
Air Filters Inc.
Free shipping
$128.83
14X20X2 Lifetime Washable Electrostatic AC / Furnace Filter
Air Filters Inc.
$57.95
21.5 in. X 23.5 in. X 1 in. MERV 8 (FPR 5) Dust Defense Pleated HVAC AC Furnace Air Filters Replacement (5-Pack)
Home Depot
1
Free shipping
$57.95
21.5 in. X 23.5 in. X 1 in. MERV 8 (FPR 5) Dust Defense Pleated HVAC AC Furnace Air Filters Replacement (5-Pack)
Home Depot
$25.99
VEVOR Electrostatic Air Filter 16X25x1 Inch Washable & Reusable Aluminum AC/HVAC Furnace Filter Merv 8 Long Lifetime,Home Or Office (Actual Size:
VEVOR
5
$25.99
VEVOR Electrostatic Air Filter 16X25x1 Inch Washable & Reusable Aluminum AC/HVAC Furnace Filter Merv 8 Long Lifetime,Home Or Office (Actual Size:
VEVOR
$196.43
15.75" X 40" X 1" MERV 13 AC & Furnace Filters (6 Pack)
AllFilters.com
Free shipping
$196.43
15.75" X 40" X 1" MERV 13 AC & Furnace Filters (6 Pack)
AllFilters.com
$49.64
10 in. X 10 in. X 1 in. Flexible Permanent Washable Air Filter MERV 8
Home Depot
Free shipping
$49.64
10 in. X 10 in. X 1 in. Flexible Permanent Washable Air Filter MERV 8
Home Depot
$55.69
Filtrete 20 X 30 X 1 Air Filter, 12 HVAC Filters, MPR 700, Merv 8, Dust, Pollen & Pet Dander, 3 Month Pleated 1 Inch Electrostatic Air Filters
Office Depot
Free shipping
$55.69
Filtrete 20 X 30 X 1 Air Filter, 12 HVAC Filters, MPR 700, Merv 8, Dust, Pollen & Pet Dander, 3 Month Pleated 1 Inch Electrostatic Air Filters
Office Depot
$619.95
Rabbit Air Minusa2 Ultra Quiet Air Purifier (Toxin Absorber Filter) - SPA-780N - Black
Rabbit Air
2K+
$619.95
Rabbit Air Minusa2 Ultra Quiet Air Purifier (Toxin Absorber Filter) - SPA-780N - Black
Rabbit Air
$184.92
Filterbuy 21X27x1 Air Filter (12-Pack), Pleated MERV 8 Dust Defense Replacement HVAC AC Furnace Filters (Actual Size: 20.63 X 26.25 X 0.75)
Target
Free shipping
$184.92
Filterbuy 21X27x1 Air Filter (12-Pack), Pleated MERV 8 Dust Defense Replacement HVAC AC Furnace Filters (Actual Size: 20.63 X 26.25 X 0.75)
Target
$64.96
Filterbuy 21X27x1 Air Filter (4-Pack), Pleated MERV 8 Dust Defense Replacement HVAC AC Furnace Filters (Actual Size: 20.63 X 26.25 X 0.75)
Target
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Filterbuy 21X27x1 Air Filter (4-Pack), Pleated MERV 8 Dust Defense Replacement HVAC AC Furnace Filters (Actual Size: 20.63 X 26.25 X 0.75)
Target
$92.94
Filterbuy 21X27x1 Air Filter (6-Pack), Pleated MERV 8 Dust Defense Replacement HVAC AC Furnace Filters (Actual Size: 20.63 X 26.25 X 0.75)
Target
Free shipping
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Filterbuy 21X27x1 Air Filter (6-Pack), Pleated MERV 8 Dust Defense Replacement HVAC AC Furnace Filters (Actual Size: 20.63 X 26.25 X 0.75)
Target
Home technology expert Ross Trethewey explains the MERV system and how air filtration systems work then he shows how to build a localized #DIY air filter. ⤵️ More information here >> bit.ly/2NbwU2U | This Old House
7:26
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FacebookThis Old House
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Ross Trethewey explains how air filtration systems work and shares some tips on how to build your own air filter. 👇Breathe cleaner air with these easy steps👇 | This Old House
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Breathe cleaner air at home with a DIY air filter! Ross Trethewey demonstrates how to create your own cost-effective air filtration system đź’¨ | This Old House
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FacebookThis Old House
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Shop DIY Air Filter This Old House

Sponsored
About our ads
$79.30
16X25x5 Furnace & Whole House Air Filter For Air Bear MERV 11 / 2
Air Filters Delivered
$79.30
16X25x5 Furnace & Whole House Air Filter For Air Bear MERV 11 / 2
Air Filters Delivered
$40.99
16X20x1 Aerostar Air Filter MERV 11 + Carbon / 2
Air Filters Delivered
$40.99
16X20x1 Aerostar Air Filter MERV 11 + Carbon / 2
Air Filters Delivered
$93.11
20X36x2 Aerostar MERV 8 Air Filter, 2 Pack, Standard Dust Defense, HVAC AC Furnace Filters
Air Filters Delivered
$93.11
20X36x2 Aerostar MERV 8 Air Filter, 2 Pack, Standard Dust Defense, HVAC AC Furnace Filters
Air Filters Delivered
$119.00
Buy 3 Get 1 FREE - Ionic Air Purifier Special Offer 2025
Lab Charge Air Purifiers
$119.00
Buy 3 Get 1 FREE - Ionic Air Purifier Special Offer 2025
Lab Charge Air Purifiers
$69.99
4-PACK Replacement Filter For MA Air Purifier -40, 40E Series | 3 in 1 Genuine H13 Filter
Amazon.com
34
Free shipping
$69.99
4-PACK Replacement Filter For MA Air Purifier -40, 40E Series | 3 in 1 Genuine H13 Filter
Amazon.com
$399.95
Lennox Healthy Climate Lennox X6675 20X25x5 Air Filter, Healthy Climate Carbon Clean Merv 16 Home Furnace Filter For HVAC System 4 Pack With
Amazon.com
351
Free shipping
$399.95
Lennox Healthy Climate Lennox X6675 20X25x5 Air Filter, Healthy Climate Carbon Clean Merv 16 Home Furnace Filter For HVAC System 4 Pack With
Amazon.com
$150.00
5Pcs Ionic Filterless Air Purifiers For Home - Large Rooms Or Bedrooms. Best Air Purifier For Allergies, Mold, Dust & Smoke | Labcharge
Lab Charge Air Purifiers
$150.00
5Pcs Ionic Filterless Air Purifiers For Home - Large Rooms Or Bedrooms. Best Air Purifier For Allergies, Mold, Dust & Smoke | Labcharge
Lab Charge Air Purifiers
$99.98
$121.90
110 Aprilaire MERV 11 Replacement Whole-House Air Purifier Filter By Aprilaire, 2 Pk | Furnace & AC Filter | Pleated"
Discount Filters
17% off
$99.98
$121.90
110 Aprilaire MERV 11 Replacement Whole-House Air Purifier Filter By Aprilaire, 2 Pk | Furnace & AC Filter | Pleated"
Discount Filters
$119.00
$260.00
Buy 3 Get 1 FREE - Ionic Air Purifier Special Offer 2025
Lab Charge Air Purifiers
54% off
$119.00
$260.00
Buy 3 Get 1 FREE - Ionic Air Purifier Special Offer 2025
Lab Charge Air Purifiers
$36.00
Sub-Zero Air Purification Cartridge 7042798 7007067 1PACK
subzeroshop
$36.00
Sub-Zero Air Purification Cartridge 7042798 7007067 1PACK
subzeroshop
$87.60
$109.61
201 Aprilaire MERV 11 Replacement Whole-House Air Purifier Filter By Bestairpro, 4 Pk | Furnace & AC Filter | Pleated"
Discount Filters
20% off
$87.60
$109.61
201 Aprilaire MERV 11 Replacement Whole-House Air Purifier Filter By Bestairpro, 4 Pk | Furnace & AC Filter | Pleated"
Discount Filters
$90.24
20X40x1 Air Filters (6-Pack) MERV 8 - Standard / Dust Defense | Pleated, Standard Capacity Replacement Air Filters For HVAC, AC, Furnace
Filter King
$90.24
20X40x1 Air Filters (6-Pack) MERV 8 - Standard / Dust Defense | Pleated, Standard Capacity Replacement Air Filters For HVAC, AC, Furnace
Filter King
$157.00
$183.80
401 Aprilaire MERV 10 Replacement Whole-House Air Purifier Filter By Aprilaire, 4 Pk | Furnace & AC Filter | Pleated"
Discount Filters
14% off
$157.00
$183.80
401 Aprilaire MERV 10 Replacement Whole-House Air Purifier Filter By Aprilaire, 4 Pk | Furnace & AC Filter | Pleated"
Discount Filters
$59.99
K&N HVC-11625: K&N Washable Home Air Filters
Summit Racing
1
$59.99
K&N HVC-11625: K&N Washable Home Air Filters
Summit Racing
$15.03
American Metal Filter Company Duct-Free Universal Air Filter Silver | BPRCP0806
Lowe's
$15.03
American Metal Filter Company Duct-Free Universal Air Filter Silver | BPRCP0806
Lowe's
$4.49
Frost King 15 X 24 X 1 Washable MERV Cut To Fit Air Filter | F1524
Lowe's
76
$4.49
Frost King 15 X 24 X 1 Washable MERV Cut To Fit Air Filter | F1524
Lowe's
$15.00
American Metal Filter Company Universal Air Filter Silver | BPRHF1012
Lowe's
$15.00
American Metal Filter Company Universal Air Filter Silver | BPRHF1012
Lowe's
$249.28
24.75" X 50.375" X 1" Air Filter - 24 3/4" X 50 3/8" X 1" (6-Pack)
FiltersFast.com
$249.28
24.75" X 50.375" X 1" Air Filter - 24 3/4" X 50 3/8" X 1" (6-Pack)
FiltersFast.com