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$72.00

Sub-Zero Air Purification Cartridge 7042798 7007067 2PACK

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$72.00

Sub-Zero Air Purification Cartridge 7042798 7007067 2PACK

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$162.62

Micro-Air P7408RM OEM Replacement Filter

Filter Junkie

$162.62

Micro-Air P7408RM OEM Replacement Filter

Filter Junkie

$93.00

Sub-Zero Air Purification Cartridge 7042798 7007067 SAVE BIG 3PACK Oy"¥

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$93.00

Sub-Zero Air Purification Cartridge 7042798 7007067 SAVE BIG 3PACK Oy"¥

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$67.96

20X20x4 Air Filters (4-Pack) MERV 8 - Standard / Dust Defense | Pleated, Standard Capacity Replacement Air Filters For HVAC, AC, Furnace

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2K+

$67.96

20X20x4 Air Filters (4-Pack) MERV 8 - Standard / Dust Defense | Pleated, Standard Capacity Replacement Air Filters For HVAC, AC, Furnace

Filter King

$36.00

Sub-Zero Air Purification Cartridge 7042798 7007067 1PACK

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$36.00

Sub-Zero Air Purification Cartridge 7042798 7007067 1PACK

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$52.00

Air Purifier Replacement HEPA Filter - ULINE

Uline

$52.00

Air Purifier Replacement HEPA Filter - ULINE

Uline

$104.23

Torit/Donaldson P191889 OEM Replacement Filter

Filter Junkie

$104.23

Torit/Donaldson P191889 OEM Replacement Filter

Filter Junkie

$390.60

HEPA Filter 24 X 24 X 12

Filter Junkie

$390.60

HEPA Filter 24 X 24 X 12

Filter Junkie

$230.00

Air Scrubber Replacement HEPA Filter - ULINE

Uline

$230.00

Air Scrubber Replacement HEPA Filter - ULINE

Uline

$390.60

HEPA Filter 23-3/8 X 23-3/8 X 12

Filter Junkie

$390.60

HEPA Filter 23-3/8 X 23-3/8 X 12

Filter Junkie

$205.49

Clean Air America PORTABLE-FLT-RPL OEM Replacement Filter

Filter Junkie

$205.49

Clean Air America PORTABLE-FLT-RPL OEM Replacement Filter

Filter Junkie

$130.60

25X25x2 Air Filters (5-Pack) MERV 13 - Superior Protection | Pleated, Standard Capacity Replacement Air Filters For HVAC, AC, Furnace

Filter King

$130.60

25X25x2 Air Filters (5-Pack) MERV 13 - Superior Protection | Pleated, Standard Capacity Replacement Air Filters For HVAC, AC, Furnace

Filter King

$109.06

Pro Air TDSF-1000873 OEM Replacement Filter

Filter Junkie

$109.06

Pro Air TDSF-1000873 OEM Replacement Filter

Filter Junkie

$150.00

5Pcs Ionic Filterless Air Purifier For Home - Large Rooms Or Bedrooms. Best Air Purifier For Allergies, Mold, Dust & Smoke. Labcharge Air Purifier

Lab Charge Air Purifiers

$150.00

5Pcs Ionic Filterless Air Purifier For Home - Large Rooms Or Bedrooms. Best Air Purifier For Allergies, Mold, Dust & Smoke. Labcharge Air Purifier

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

$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

$168.00

Air Scrubber Optional Pre-Filter - 21X19x1" - ULINE - Case Of 12

Uline

$168.00

Air Scrubber Optional Pre-Filter - 21X19x1" - ULINE - Case Of 12

Uline

$32.49

Goodman Air Filters

FilterBuy.com

$32.49

Goodman Air Filters

FilterBuy.com

$79.99

Ionic Air Purifier For Allergies & Pet Odors - Quiet & Efficient

Lab Charge Air Purifiers

$79.99

Ionic Air Purifier For Allergies & Pet Odors - Quiet & Efficient

Lab Charge Air Purifiers

$150.00

Air Purifier - 135 Sq. Ft. - ULINE

Uline

$150.00

Air Purifier - 135 Sq. Ft. - ULINE

Uline

$288.00

Air Scrubber Replacement Pre-Filter - 21X19x2" - ULINE - Case Of 12

Uline

$288.00

Air Scrubber Replacement Pre-Filter - 21X19x2" - ULINE - Case Of 12

Uline

$45.99

20X25x5 Air Filter (1-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters For Honeywell FC100A1037, Lennox X6673, Carrier, & More

FilterBuy.com

198

$45.99

20X25x5 Air Filter (1-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters For Honeywell FC100A1037, Lennox X6673, Carrier, & More

FilterBuy.com

$17.99

Box Fan Air Filter Woodworking Plans - DIY PDF Build Plan - Printable Air Purifier For Garage Or Workshop

Etsy

$17.99

Box Fan Air Filter Woodworking Plans - DIY PDF Build Plan - Printable Air Purifier For Garage Or Workshop

Etsy

$62.00

Air Scrubber Optional Carbon Filter - ULINE

Uline

$62.00

Air Scrubber Optional Carbon Filter - ULINE

Uline

$150.00

DIY Air Purifier Box Awesome STEM Project! Fits 20x20 filter/140mm PC Fans. No Tool Assembly! Make Christmas A Bit Safer This Year!

Etsy

$150.00

DIY Air Purifier Box Awesome STEM Project! Fits 20x20 filter/140mm PC Fans. No Tool Assembly! Make Christmas A Bit Safer This Year!

Etsy

$39.84

20X20x1 Air Filters (4-Pack) MERV 11 - Advanced / Allergen Defense | Pleated, Standard Capacity Replacement Air Filters For HVAC, AC, Furnace

Filter King

$39.84

20X20x1 Air Filters (4-Pack) MERV 11 - Advanced / Allergen Defense | Pleated, Standard Capacity Replacement Air Filters For HVAC, AC, Furnace

Filter King

$74.88

20X20x1 Air Filter (12-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 X 19.50 X 0.75 Inches)

FilterBuy.com

711

$74.88

20X20x1 Air Filter (12-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 X 19.50 X 0.75 Inches)

FilterBuy.com

$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

$235.20

HEPA Filter 12 X 24 X 12

Filter Junkie

$235.20

HEPA Filter 12 X 24 X 12

Filter Junkie

$73.95

AIRDOCTOR AD3000 / AD3500 Genuine Replacement Ultrahepa Filter For Air Doctor 4- In-1 Home Purifier | MADE BY AIRDOCTOR (AD3500 Ultrahepa Filter)

Amazon.com

484

Free shipping

$73.95

AIRDOCTOR AD3000 / AD3500 Genuine Replacement Ultrahepa Filter For Air Doctor 4- In-1 Home Purifier | MADE BY AIRDOCTOR (AD3500 Ultrahepa Filter)

Amazon.com

DIY Air Filter: How to Build Your Own Air Purifier

Jan 17, 2021

thisoldhouse.com

A DIY Air Filter For Your Shop That Anyone Can Build

Jun 13, 2016

popularmechanics.com

Simple and Cheap Homemade Air Filter

Oct 3, 2020

instructables.com