20x21x1-air-filter

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Filterbuy 20x21x1 Pleated Air Filters, Replacement for HVAC AC Furnace (MERV 11)
Filterbuy 20x21x1 Pleated Air Filters, Replacement for HVAC AC Furnace (MERV 11)

$36.70

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Aerostar 20x21x1 MERV 8 Furnace Air Filter, 4 Pack
Aerostar 20x21x1 MERV 8 Furnace Air Filter, 4 Pack

$49.76

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Filterbuy 20x21x1 Pleated Air Filters, Replacement for HVAC AC Furnace (MERV 8)
Filterbuy 20x21x1 Pleated Air Filters, Replacement for HVAC AC Furnace (MERV 8)

$31.80

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Aerostar 20x21x1 MERV 8 Furnace Air Filter, 6 Pack
Aerostar 20x21x1 MERV 8 Furnace Air Filter, 6 Pack

$57.32

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20"x 21"x 1" Poly-Flo Rigid Washable Cut-to-Fit AC Furnace Air Filter Quantity 1
20"x 21"x 1" Poly-Flo Rigid Washable Cut-to-Fit AC Furnace Air Filter Quantity 1

$20.09

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Filter King 20x21x1 Air Filter 6-PACK MERV 8 Actual Size 20 x 21 x .75"
Filter King 20x21x1 Air Filter 6-PACK MERV 8 Actual Size 20 x 21 x .75"

$54.94

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Simply Filters 20x21x1 MERV 8, MPR 600, AC Furnace HVAC Air Filter
Simply Filters 20x21x1 MERV 8, MPR 600, AC Furnace HVAC Air Filter

$35.99

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Filters Fast 20x21x1 MERV 8, 1 Inch Pleated HVAC AC Furnace Air Filters, 6 Pack
Filters Fast 20x21x1 MERV 8, 1 Inch Pleated HVAC AC Furnace Air Filters, 6 Pack

$62.99

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Filter King 20x21x1 Air Filter 6-PACK MERV 13 Actual Size 20 x 21 x .75"
Filter King 20x21x1 Air Filter 6-PACK MERV 13 Actual Size 20 x 21 x .75"

$64.99

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Flanders SuperFlow 2 20" x 21" x 1" Fiber Media Air Filter Lot Of 12
Flanders SuperFlow 2 20" x 21" x 1" Fiber Media Air Filter Lot Of 12

$30.07

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Filterbuy 20x21x1 Pleated Air Filters, Replacement for HVAC AC Furnace (MERV 13)
Filterbuy 20x21x1 Pleated Air Filters, Replacement for HVAC AC Furnace (MERV 13)

$46.48

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Filter King 20x21x1 Air Filter 4-PACK MERV 13 Actual Size 20 x 21 x .75"
Filter King 20x21x1 Air Filter 4-PACK MERV 13 Actual Size 20 x 21 x .75"

$68.79

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Aerostar 20x21x1 MERV 11 Furnace Air Filter, 12 Pack
Aerostar 20x21x1 MERV 11 Furnace Air Filter, 12 Pack

$119.31

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Aerostar 20x21x1 MERV 8 Furnace Air Filter, 12 Pack
Aerostar 20x21x1 MERV 8 Furnace Air Filter, 12 Pack

$108.53

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Aerostar 20x21x1 MERV 13 Furnace Air Filter, 12 Pack
Aerostar 20x21x1 MERV 13 Furnace Air Filter, 12 Pack

$127.38

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Filter King 20x21x1 Air Filter 12-PACK MERV 13 Actual Size 20 x 21 x .75"
Filter King 20x21x1 Air Filter 12-PACK MERV 13 Actual Size 20 x 21 x .75"

$160.41

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(4 Pack) Blue / White Polyester Air Filter Pads - CHOOSE SIZE
(4 Pack) Blue / White Polyester Air Filter Pads - CHOOSE SIZE

$32.10

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(12 Pack) Blue / White Polyester Air Filter Pads CHOOSE SIZE
(12 Pack) Blue / White Polyester Air Filter Pads CHOOSE SIZE

$61.88

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Aerostar 20x21x1 MERV 13 Furnace Air Filter, 6 Pack
Aerostar 20x21x1 MERV 13 Furnace Air Filter, 6 Pack

$93.80

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Filter King 20x21x1 Air Filter 4-PACK MERV 8 Actual Size 20 x 21 x .75"
Filter King 20x21x1 Air Filter 4-PACK MERV 8 Actual Size 20 x 21 x .75"

$45.95

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Simply Filters 20x21x1 MERV 11, MPR 1000, AC Furnace HVAC Air Filter
Simply Filters 20x21x1 MERV 11, MPR 1000, AC Furnace HVAC Air Filter

$36.96

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Filter King 20x21x1 Air Filter 4-PACK MERV 8 Actual Size 20 x 21 x .75"
Filter King 20x21x1 Air Filter 4-PACK MERV 8 Actual Size 20 x 21 x .75"

$54.56

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(6) Orange/White Polyester Filter Pads 1" Poly MERV 8 Tackified CHOOSE SIZE
(6) Orange/White Polyester Filter Pads 1" Poly MERV 8 Tackified CHOOSE SIZE

$51.88

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(6) Orange/White Polyester Filter Pads 1" Poly MERV8 Tackified - CHOOSE SIZE
(6) Orange/White Polyester Filter Pads 1" Poly MERV8 Tackified - CHOOSE SIZE

$49.80

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Simply Filters 20x21x1 MERV 13, MPR 1500, AC Furnace HVAC Air Filter
Simply Filters 20x21x1 MERV 13, MPR 1500, AC Furnace HVAC Air Filter

$46.80

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Atomic Compatible for Lennox X8790 PureAir MERV 16 PLEATED Furnace Filter 20x21x
Atomic Compatible for Lennox X8790 PureAir MERV 16 PLEATED Furnace Filter 20x21x

$121.89

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Glasfloss 20x21x1 - MERV 10 - (Qty:4) - Pleated Furnace Air Filter - Made in USA
Glasfloss 20x21x1 - MERV 10 - (Qty:4) - Pleated Furnace Air Filter - Made in USA

$71.99

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20"x 21"x 1" Poly-Flo Rigid Washable Cut-to-Fit AC Furnace Air Filter Quantity 3
20"x 21"x 1" Poly-Flo Rigid Washable Cut-to-Fit AC Furnace Air Filter Quantity 3

$56.39

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Aerostar 20x21x1 MERV 13 Furnace Air Filter, 4 Pack
Aerostar 20x21x1 MERV 13 Furnace Air Filter, 4 Pack

$91.87

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Aerostar 20x21x1 MERV 11 Air Filter, 6 Pack (19 7/8" x 20 7/8" x 3/4")
Aerostar 20x21x1 MERV 11 Air Filter, 6 Pack (19 7/8" x 20 7/8" x 3/4")

$81.33

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Glasfloss 20x21x1 - MERV 10 - (Qty:6) - Pleated Furnace Air Filter - Made in USA
Glasfloss 20x21x1 - MERV 10 - (Qty:6) - Pleated Furnace Air Filter - Made in USA

$101.99

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KOCH Filter Multi-Pleat XL8 MERV 8, 20x21x1, Box of 12 Filters
KOCH Filter Multi-Pleat XL8 MERV 8, 20x21x1, Box of 12 Filters

$179.00

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(3 Pack) Blue / White Polyester Air Filter Pads - CHOOSE SIZE
(3 Pack) Blue / White Polyester Air Filter Pads - CHOOSE SIZE

$30.15

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(12) Green / White MERV 8 Polyester Air Filter Pads CHOOSE SIZE
(12) Green / White MERV 8 Polyester Air Filter Pads CHOOSE SIZE

$64.88

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Filter King 20x21x1 Air Filter 12-PACK MERV 8 Actual Size 20 x 21 x .75"
Filter King 20x21x1 Air Filter 12-PACK MERV 8 Actual Size 20 x 21 x .75"

$123.00

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(6 Pack) Blue / White Polyester Air Filter Pads - CHOOSE SIZE
(6 Pack) Blue / White Polyester Air Filter Pads - CHOOSE SIZE

$48.30

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(12) Orange / White MERV 8 Polyester Air Filter Pads Tackified CHOOSE SIZE
(12) Orange / White MERV 8 Polyester Air Filter Pads Tackified CHOOSE SIZE

$68.88

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Glasfloss 20x21x1 - MERV 10 - (Qty:12) - Pleated Air Furnace Filter Made in USA
Glasfloss 20x21x1 - MERV 10 - (Qty:12) - Pleated Air Furnace Filter Made in USA

$152.99

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Aerostar 20x21x1 MERV 11 Furnace Air Filter, 4 Pack
Aerostar 20x21x1 MERV 11 Furnace Air Filter, 4 Pack

$57.35

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Proairtek AF20211M13SWH Model MERV13 20x21x1 Air Filters (Pack of 4)
Proairtek AF20211M13SWH Model MERV13 20x21x1 Air Filters (Pack of 4)

$58.88

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Filters 20x21x1 8, MPR 600, Air Filter (4 Pack) - Actual Size: 20"x21"x0.75" ...
Filters 20x21x1 8, MPR 600, Air Filter (4 Pack) - Actual Size: 20"x21"x0.75" ...

$79.05

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Filters 20x21x1 8, MPR 600, Air Filter (4 Pack) - Actual Size: 20"x21"x0.75" ...
Filters 20x21x1 8, MPR 600, Air Filter (4 Pack) - Actual Size: 20"x21"x0.75" ...

$79.05

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Aerostar Air Filter 20x21x1 MERV 8 6 Pack
Aerostar Air Filter 20x21x1 MERV 8 6 Pack

$34.99

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(6 PACK) Green / White Polyester Air Filter Pads - CHOOSE SIZE
(6 PACK) Green / White Polyester Air Filter Pads - CHOOSE SIZE

$59.30

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Proairtek AF20211M11SWH Model MERV11 20x21x1 Air Filter For Anyone Wanting Clean
Proairtek AF20211M11SWH Model MERV11 20x21x1 Air Filter For Anyone Wanting Clean

$16.88

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(6) 20 x 21 x 1 Filter Pads Blue / White Polysynthetic 2-Stage Media
(6) 20 x 21 x 1 Filter Pads Blue / White Polysynthetic 2-Stage Media

$51.95

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Proairtek AF20211M08SWH Model MERV08 20x21x1 Air Filters (Pack of 2)
Proairtek AF20211M08SWH Model MERV08 20x21x1 Air Filters (Pack of 2)

$22.88

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Proairtek AF20211M11SWH Model MERV11 20x21x1 Air Filters (Pack of 2)
Proairtek AF20211M11SWH Model MERV11 20x21x1 Air Filters (Pack of 2)

$22.88

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(12) 20 x 21 x 1 Filter Pads Blue / White Polysynthetic 2-Stage Media
(12) 20 x 21 x 1 Filter Pads Blue / White Polysynthetic 2-Stage Media

$63.95

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Qty = 28: Media Air Filters 20" x 21" x 1"
Qty = 28: Media Air Filters 20" x 21" x 1"

$100.00

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20X21X1 MERV 13 PLEATED AIR FILTER HIGH CAPCITY - 6 PACK
20X21X1 MERV 13 PLEATED AIR FILTER HIGH CAPCITY - 6 PACK

$67.30

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Proairtek AF20211M11SWH Model MERV11 20x21x1 Air Filters (Pack of 4)
Proairtek AF20211M11SWH Model MERV11 20x21x1 Air Filters (Pack of 4)

$31.88

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4 MEDIUM SIZE ACCUMULAIR GOLD MERV 8 HOME FURNACE AIR FILTERS PLEATED ALLERGEN
4 MEDIUM SIZE ACCUMULAIR GOLD MERV 8 HOME FURNACE AIR FILTERS PLEATED ALLERGEN

$64.30

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Proairtek AF20211M08SWH Model MERV08 20x21x1 Air Filters (Pack of 6)
Proairtek AF20211M08SWH Model MERV08 20x21x1 Air Filters (Pack of 6)

$51.88

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Proairtek AF20211M11SWH Model MERV11 20x21x1 Air Filters (Pack of 6)
Proairtek AF20211M11SWH Model MERV11 20x21x1 Air Filters (Pack of 6)

$51.88

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Proairtek AF20211M13SWH Model MERV13 20x21x1 Air Filters (Pack of 6)
Proairtek AF20211M13SWH Model MERV13 20x21x1 Air Filters (Pack of 6)

$79.88

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(12 PACK) Green / White Polyester Air Filter Pads - CHOOSE SIZE
(12 PACK) Green / White Polyester Air Filter Pads - CHOOSE SIZE

$75.00

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MERV 8 Air Filters 10x10 - 6 Pack for Dust, Pet & Allergy Relief
MERV 8 Air Filters 10x10 - 6 Pack for Dust, Pet & Allergy Relief

$89.99

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4 TITANIUM ACCUMULAIR HOME PLEATED AIR FILTERS LONG LIFE ALLERGY DUST REDUCING
4 TITANIUM ACCUMULAIR HOME PLEATED AIR FILTERS LONG LIFE ALLERGY DUST REDUCING

$71.50

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(12) Orange/White Polyester Filter Pads 1" Poly MERV8 Tackified - CHOOSE SIZE
(12) Orange/White Polyester Filter Pads 1" Poly MERV8 Tackified - CHOOSE SIZE

$72.95

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4-Pack Enviroflow Pollen and Dust Control 20x21x1a MERV 8 Furnace Air Filter
4-Pack Enviroflow Pollen and Dust Control 20x21x1a MERV 8 Furnace Air Filter

$38.00

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20 x 21 x 1 Pads-N-Frame (6) MERV8 HVAC Orange Filters & (1) Frame
20 x 21 x 1 Pads-N-Frame (6) MERV8 HVAC Orange Filters & (1) Frame

$106.95

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20 x 21 x 1 Pads-N-Frame (12) HVAC Blue White Filters & (1) Frame
20 x 21 x 1 Pads-N-Frame (12) HVAC Blue White Filters & (1) Frame

$113.95

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20 x 21 x 1 Pads-N-Frame (12) MERV8 HVAC Orange Filters & (1) Frame
20 x 21 x 1 Pads-N-Frame (12) MERV8 HVAC Orange Filters & (1) Frame

$134.95

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(35 Pack) 1" MERV 8 Tacky Polyester Filter Pads Orange/White
(35 Pack) 1" MERV 8 Tacky Polyester Filter Pads Orange/White

$169.85

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Filters Fast 20x21x1 MERV 11 Pleated HVAC AC Furnace Air Filters 6 Pack
Filters Fast 20x21x1 MERV 11 Pleated HVAC AC Furnace Air Filters 6 Pack

$76.99

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Filters Fast 20x21x1 MERV 13, 1 Inch Pleated HVAC AC Furnace Air Filters, 6 Pack
Filters Fast 20x21x1 MERV 13, 1 Inch Pleated HVAC AC Furnace Air Filters, 6 Pack

$82.99

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Filters Fast 1" Home Air Filters Merv 13 - Case of 6 Filters Made In The USA
Filters Fast 1" Home Air Filters Merv 13 - Case of 6 Filters Made In The USA

$76.99

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Filters Fast Allergy Air Filters 1 Inch MERV 11 Made in America, 6 Pack
Filters Fast Allergy Air Filters 1 Inch MERV 11 Made in America, 6 Pack

$76.99

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Filters 20X20X1 MERV 8, MPR 600, Air Filter (6 Pack) - Actual Size: 19.75"X19.75
Filters 20X20X1 MERV 8, MPR 600, Air Filter (6 Pack) - Actual Size: 19.75"X19.75

$87.99

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Enviroflow 12x12x1 Pollen and Dust Control Air Filter
Enviroflow 12x12x1 Pollen and Dust Control Air Filter

$5.00

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Lennox X8793 Metal Mesh Furnace Filter 20x21x1 (Actual Size 19.5x50.5)
Lennox X8793 Metal Mesh Furnace Filter 20x21x1 (Actual Size 19.5x50.5)

$89.00

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(6) MERV8 20 x 21 x 1 Filter Pads Orange / White Anti-Microbial Media
(6) MERV8 20 x 21 x 1 Filter Pads Orange / White Anti-Microbial Media

$52.95

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(12 Pack) Blue / White Polyester Air Filter Pads - CHOOSE SIZE
(12 Pack) Blue / White Polyester Air Filter Pads - CHOOSE SIZE

$61.95

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