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$76.20
20X25x4 Air Filter (4-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 X 24.50 X 3.63 Inches)
FilterBuy.com
943
$76.20
20X25x4 Air Filter (4-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 X 24.50 X 3.63 Inches)
FilterBuy.com
$37.00
$49.96
16X25x1 4 Pk MERV 11 Pleated Furnace & AC Air Filter By Airx
Discount Filters
25% off
$37.00
$49.96
16X25x1 4 Pk MERV 11 Pleated Furnace & AC Air Filter By Airx
Discount Filters
$73.00
16X25x4 Air Filter (4-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 15.50 X 24.50 X 3.63 Inches)
FilterBuy.com
2K+
$73.00
16X25x4 Air Filter (4-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 15.50 X 24.50 X 3.63 Inches)
FilterBuy.com
$85.80
Industrial Pleated Air Filters - 14X25x1", MERV 8 - ULINE - Case Of 12
Uline
$85.80
Industrial Pleated Air Filters - 14X25x1", MERV 8 - ULINE - Case Of 12
Uline
$81.00
Industrial Pleated Air Filters - 16X20x2", MERV 8 - ULINE - Case Of 12
Uline
$81.00
Industrial Pleated Air Filters - 16X20x2", MERV 8 - ULINE - Case Of 12
Uline
$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
683
$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
$62.94
16X25x4 Air Filter (3-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 15.50 X 24.50 X 3.63 Inches)
FilterBuy.com
84
$62.94
16X25x4 Air Filter (3-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 15.50 X 24.50 X 3.63 Inches)
FilterBuy.com
$64.68
20X25x4 Air Filter (3-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 X 24.50 X 3.63 Inches)
FilterBuy.com
43
$64.68
20X25x4 Air Filter (3-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 X 24.50 X 3.63 Inches)
FilterBuy.com
$45.60
$55.74
16X25x1 6 Pk MERV 11 Pleated Furnace & AC Air Filter By Airx
Discount Filters
18% off
$45.60
$55.74
16X25x1 6 Pk MERV 11 Pleated Furnace & AC Air Filter By Airx
Discount Filters
$80.40
Industrial Pleated Air Filters - 20X20x1", MERV 8 - ULINE - Case Of 12
Uline
$80.40
Industrial Pleated Air Filters - 20X20x1", MERV 8 - ULINE - Case Of 12
Uline
$88.44
$99.48
16X25x1 12 Pk MERV 11 Pleated Furnace & AC Air Filter By Airx
Discount Filters
11% off
$88.44
$99.48
16X25x1 12 Pk MERV 11 Pleated Furnace & AC Air Filter By Airx
Discount Filters
$64.96
24X25x1 Air Filter (4-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 23.88 X 24.88 X 0.75 Inches)
FilterBuy.com
135
$64.96
24X25x1 Air Filter (4-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 23.88 X 24.88 X 0.75 Inches)
FilterBuy.com
$79.98
20X20x4 Air Filter (6-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 X 19.50 X 3.63 Inches)
FilterBuy.com
45K+
$79.98
20X20x4 Air Filter (6-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 X 19.50 X 3.63 Inches)
FilterBuy.com
$63.20
18X24x4 Air Filter (2-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 17.50 X 23.38 X 3.63 Inches)
FilterBuy.com
178
$63.20
18X24x4 Air Filter (2-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 17.50 X 23.38 X 3.63 Inches)
FilterBuy.com
$84.95
$108.95
Genuine Trion Air Bear 259112-102 20X25x5 MERV 11 Furnace & AC Air Filter - 3-Pack
FiltersFast.com
22% off
$84.95
$108.95
Genuine Trion Air Bear 259112-102 20X25x5 MERV 11 Furnace & AC Air Filter - 3-Pack
FiltersFast.com
$67.00
P034519-016-002 - MERV 10 PANEL (23.38" L X 23.38" W X 1.75" D)
Donaldson Torit Filters
$67.00
P034519-016-002 - MERV 10 PANEL (23.38" L X 23.38" W X 1.75" D)
Donaldson Torit Filters
$29.99
$40.00
Genuine Trion Air Bear 255649-102 20X25x5 MERV 8 Furnace & AC Air Filter
FiltersFast.com
25% off
$29.99
$40.00
Genuine Trion Air Bear 255649-102 20X25x5 MERV 8 Furnace & AC Air Filter
FiltersFast.com
$5.97
Filtrete 18 X 20 X 1 MERV 1 Basic Flat Air Filter 2 -Pack | FPL45-2PK-24
Lowe's
$5.97
Filtrete 18 X 20 X 1 MERV 1 Basic Flat Air Filter 2 -Pack | FPL45-2PK-24
Lowe's
$72.79
$98.96
Trion Air Bear Media Filter 3-Pack 16X25x5, MERV 8
FiltersFast.com
191
26% off
$72.79
$98.96
Trion Air Bear Media Filter 3-Pack 16X25x5, MERV 8
FiltersFast.com
$30.99
Nordyne 669064R Washable Replacement Air Filter
Alpine Home Air Products
69
$30.99
Nordyne 669064R Washable Replacement Air Filter
Alpine Home Air Products
$40.23
Honeywell Home FC100A1011 20" X 20" X 4" Media Air Filter | Supplyhouse.Com
SupplyHouse.com
2K+
$40.23
Honeywell Home FC100A1011 20" X 20" X 4" Media Air Filter | Supplyhouse.Com
SupplyHouse.com
$44.96
16X25x2 Air Filters (4-Pack) MERV 8 - Standard / Dust Defense | Pleated, Standard Capacity Replacement Air Filters For HVAC, AC, Furnace
Filter King
15
$44.96
16X25x2 Air Filters (4-Pack) MERV 8 - Standard / Dust Defense | Pleated, Standard Capacity Replacement Air Filters For HVAC, AC, Furnace
Filter King
$40.23
Honeywell Home FC100A1037 20" X 25" Media Air Filter | Supplyhouse.Com
SupplyHouse.com
2K+
$40.23
Honeywell Home FC100A1037 20" X 25" Media Air Filter | Supplyhouse.Com
SupplyHouse.com
$23.97
Filtrete 24 X 30 X 1 MERV 11 1085 MPR Allergen Defense Extra Electrostatic Pleated Air Filter 2 -Pack | 1213-2PK
Lowe's
12K+
$23.97
Filtrete 24 X 30 X 1 MERV 11 1085 MPR Allergen Defense Extra Electrostatic Pleated Air Filter 2 -Pack | 1213-2PK
Lowe's
$68.40
Global Industrial Pleated Air Filter, 16 X 20 X 1", MERV 8, Standard Capacity, Wire Backed - Pkg Qty 12
Global Industrial
$68.40
Global Industrial Pleated Air Filter, 16 X 20 X 1", MERV 8, Standard Capacity, Wire Backed - Pkg Qty 12
Global Industrial
$63.60
Global Industrial Pleated Air Filter, 20 X 25 X 2", MERV 8, Standard Capacity, Self-Supported - Pkg Qty 12
Global Industrial
$63.60
Global Industrial Pleated Air Filter, 20 X 25 X 2", MERV 8, Standard Capacity, Self-Supported - Pkg Qty 12
Global Industrial
$79.32
12X20x1 Air Filters (6-Pack) MERV 13 - Superior Protection | Pleated, Standard Capacity Replacement Air Filters For HVAC, AC, Furnace
Filter King
5
$79.32
12X20x1 Air Filters (6-Pack) MERV 13 - Superior Protection | Pleated, Standard Capacity Replacement Air Filters For HVAC, AC, Furnace
Filter King
$5.97
Filtrete 14 X 20 X 1 MERV 1 Basic Flat Air Filter 2 -Pack | FPL05-2PK-24
Lowe's
$5.97
Filtrete 14 X 20 X 1 MERV 1 Basic Flat Air Filter 2 -Pack | FPL05-2PK-24
Lowe's
$48.96
25X25x1 Air Filters (4-Pack) MERV 11 - Advanced / Allergen Defense | Pleated, Standard Capacity Replacement Air Filters For HVAC, AC, Furnace
Filter King
5
$48.96
25X25x1 Air Filters (4-Pack) MERV 11 - Advanced / Allergen Defense | Pleated, Standard Capacity Replacement Air Filters For HVAC, AC, Furnace
Filter King
$21.85
Nordyne 669064R Filter Replacement, 669064R | Supplyhouse.Com
SupplyHouse.com
69
$21.85
Nordyne 669064R Filter Replacement, 669064R | Supplyhouse.Com
SupplyHouse.com
$96.48
Washable HVAC Metal Stainless Steel Air Filter Standard 1
Metal Filter Inc
$96.48
Washable HVAC Metal Stainless Steel Air Filter Standard 1
Metal Filter Inc
$81.60
Koch Filter XL8 Pleated Filter, 16 X 25 X 2", MERV 8, Standard Capacity - Pkg Qty 12, 102-700-017
Global Industrial
$81.60
Koch Filter XL8 Pleated Filter, 16 X 25 X 2", MERV 8, Standard Capacity - Pkg Qty 12, 102-700-017
Global Industrial
$37.99
16X25x1 Aerostar Air Filter MERV 6 / 6
Air Filters Delivered
110
$37.99
16X25x1 Aerostar Air Filter MERV 6 / 6
Air Filters Delivered
$84.95
Washable 1" MERV 8 Filter
Metal Filter Inc
$84.95
Washable 1" MERV 8 Filter
Metal Filter Inc
$38.99
16X20x1 Aerostar Air Filter MERV 8 / 6
Air Filters Delivered
36
$38.99
16X20x1 Aerostar Air Filter MERV 8 / 6
Air Filters Delivered
$114.06
15 3/8X25 1/2X1 Aerostar MERV 8 Air Filter, 6 Pack, Standard Dust Defense, HVAC AC Furnace Filters
Air Filters Delivered
$114.06
15 3/8X25 1/2X1 Aerostar MERV 8 Air Filter, 6 Pack, Standard Dust Defense, HVAC AC Furnace Filters
Air Filters Delivered
Furnace Air Filter Types Explained!
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YouTubeSimply Filters
Furnace Air Filter Types Explained!
Not every filter is made the same! We go through the different types of filters and what their functions are. There is a surprising variety of air filters from basic fiberglass to high-powered HEPA filters. Each type works differently and are made for specific purposes, and here we go through: 💨 How each type works: Learn the unique ...
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Shop furnace filters

Sponsored
About our ads
$64.96
24X25x1 Air Filter (4-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 23.88 X 24.88 X 0.75 Inches)
FilterBuy.com
135
$64.96
24X25x1 Air Filter (4-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 23.88 X 24.88 X 0.75 Inches)
FilterBuy.com
$79.98
20X20x4 Air Filter (6-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 X 19.50 X 3.63 Inches)
FilterBuy.com
45K+
$79.98
20X20x4 Air Filter (6-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 X 19.50 X 3.63 Inches)
FilterBuy.com
$63.20
18X24x4 Air Filter (2-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 17.50 X 23.38 X 3.63 Inches)
FilterBuy.com
178
$63.20
18X24x4 Air Filter (2-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 17.50 X 23.38 X 3.63 Inches)
FilterBuy.com
$84.95
$108.95
Genuine Trion Air Bear 259112-102 20X25x5 MERV 11 Furnace & AC Air Filter - 3-Pack
FiltersFast.com
22% off
$84.95
$108.95
Genuine Trion Air Bear 259112-102 20X25x5 MERV 11 Furnace & AC Air Filter - 3-Pack
FiltersFast.com
$67.00
P034519-016-002 - MERV 10 PANEL (23.38" L X 23.38" W X 1.75" D)
Donaldson Torit Filters
$67.00
P034519-016-002 - MERV 10 PANEL (23.38" L X 23.38" W X 1.75" D)
Donaldson Torit Filters
$29.99
$40.00
Genuine Trion Air Bear 255649-102 20X25x5 MERV 8 Furnace & AC Air Filter
FiltersFast.com
25% off
$29.99
$40.00
Genuine Trion Air Bear 255649-102 20X25x5 MERV 8 Furnace & AC Air Filter
FiltersFast.com
$5.97
Filtrete 18 X 20 X 1 MERV 1 Basic Flat Air Filter 2 -Pack | FPL45-2PK-24
Lowe's
$5.97
Filtrete 18 X 20 X 1 MERV 1 Basic Flat Air Filter 2 -Pack | FPL45-2PK-24
Lowe's
$72.79
$98.96
Trion Air Bear Media Filter 3-Pack 16X25x5, MERV 8
FiltersFast.com
191
26% off
$72.79
$98.96
Trion Air Bear Media Filter 3-Pack 16X25x5, MERV 8
FiltersFast.com
$30.99
Nordyne 669064R Washable Replacement Air Filter
Alpine Home Air Products
69
$30.99
Nordyne 669064R Washable Replacement Air Filter
Alpine Home Air Products
$40.23
Honeywell Home FC100A1011 20" X 20" X 4" Media Air Filter | Supplyhouse.Com
SupplyHouse.com
2K+
$40.23
Honeywell Home FC100A1011 20" X 20" X 4" Media Air Filter | Supplyhouse.Com
SupplyHouse.com
$44.96
16X25x2 Air Filters (4-Pack) MERV 8 - Standard / Dust Defense | Pleated, Standard Capacity Replacement Air Filters For HVAC, AC, Furnace
Filter King
15
$44.96
16X25x2 Air Filters (4-Pack) MERV 8 - Standard / Dust Defense | Pleated, Standard Capacity Replacement Air Filters For HVAC, AC, Furnace
Filter King
$40.23
Honeywell Home FC100A1037 20" X 25" Media Air Filter | Supplyhouse.Com
SupplyHouse.com
2K+
$40.23
Honeywell Home FC100A1037 20" X 25" Media Air Filter | Supplyhouse.Com
SupplyHouse.com
$23.97
Filtrete 24 X 30 X 1 MERV 11 1085 MPR Allergen Defense Extra Electrostatic Pleated Air Filter 2 -Pack | 1213-2PK
Lowe's
12K+
$23.97
Filtrete 24 X 30 X 1 MERV 11 1085 MPR Allergen Defense Extra Electrostatic Pleated Air Filter 2 -Pack | 1213-2PK
Lowe's
$68.40
Global Industrial Pleated Air Filter, 16 X 20 X 1", MERV 8, Standard Capacity, Wire Backed - Pkg Qty 12
Global Industrial
$68.40
Global Industrial Pleated Air Filter, 16 X 20 X 1", MERV 8, Standard Capacity, Wire Backed - Pkg Qty 12
Global Industrial
$63.60
Global Industrial Pleated Air Filter, 20 X 25 X 2", MERV 8, Standard Capacity, Self-Supported - Pkg Qty 12
Global Industrial
$63.60
Global Industrial Pleated Air Filter, 20 X 25 X 2", MERV 8, Standard Capacity, Self-Supported - Pkg Qty 12
Global Industrial
$79.32
12X20x1 Air Filters (6-Pack) MERV 13 - Superior Protection | Pleated, Standard Capacity Replacement Air Filters For HVAC, AC, Furnace
Filter King
5
$79.32
12X20x1 Air Filters (6-Pack) MERV 13 - Superior Protection | Pleated, Standard Capacity Replacement Air Filters For HVAC, AC, Furnace
Filter King
$5.97
Filtrete 14 X 20 X 1 MERV 1 Basic Flat Air Filter 2 -Pack | FPL05-2PK-24
Lowe's
$5.97
Filtrete 14 X 20 X 1 MERV 1 Basic Flat Air Filter 2 -Pack | FPL05-2PK-24
Lowe's
$48.96
25X25x1 Air Filters (4-Pack) MERV 11 - Advanced / Allergen Defense | Pleated, Standard Capacity Replacement Air Filters For HVAC, AC, Furnace
Filter King
5
$48.96
25X25x1 Air Filters (4-Pack) MERV 11 - Advanced / Allergen Defense | Pleated, Standard Capacity Replacement Air Filters For HVAC, AC, Furnace
Filter King

Shop furnace filters

Sponsored
About our ads
$76.20
20X25x4 Air Filter (4-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 X 24.50 X 3.63 Inches)
FilterBuy.com
943
$76.20
20X25x4 Air Filter (4-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 X 24.50 X 3.63 Inches)
FilterBuy.com
$37.00
$49.96
16X25x1 4 Pk MERV 11 Pleated Furnace & AC Air Filter By Airx
Discount Filters
25% off
$37.00
$49.96
16X25x1 4 Pk MERV 11 Pleated Furnace & AC Air Filter By Airx
Discount Filters
$73.00
16X25x4 Air Filter (4-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 15.50 X 24.50 X 3.63 Inches)
FilterBuy.com
2K+
$73.00
16X25x4 Air Filter (4-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 15.50 X 24.50 X 3.63 Inches)
FilterBuy.com
$85.80
Industrial Pleated Air Filters - 14X25x1", MERV 8 - ULINE - Case Of 12
Uline
$85.80
Industrial Pleated Air Filters - 14X25x1", MERV 8 - ULINE - Case Of 12
Uline
$81.00
Industrial Pleated Air Filters - 16X20x2", MERV 8 - ULINE - Case Of 12
Uline
$81.00
Industrial Pleated Air Filters - 16X20x2", MERV 8 - ULINE - Case Of 12
Uline
$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
683
$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
$62.94
16X25x4 Air Filter (3-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 15.50 X 24.50 X 3.63 Inches)
FilterBuy.com
84
$62.94
16X25x4 Air Filter (3-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 15.50 X 24.50 X 3.63 Inches)
FilterBuy.com
$64.68
20X25x4 Air Filter (3-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 X 24.50 X 3.63 Inches)
FilterBuy.com
43
$64.68
20X25x4 Air Filter (3-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 X 24.50 X 3.63 Inches)
FilterBuy.com
$45.60
$55.74
16X25x1 6 Pk MERV 11 Pleated Furnace & AC Air Filter By Airx
Discount Filters
18% off
$45.60
$55.74
16X25x1 6 Pk MERV 11 Pleated Furnace & AC Air Filter By Airx
Discount Filters
$80.40
Industrial Pleated Air Filters - 20X20x1", MERV 8 - ULINE - Case Of 12
Uline
$80.40
Industrial Pleated Air Filters - 20X20x1", MERV 8 - ULINE - Case Of 12
Uline
$88.44
$99.48
16X25x1 12 Pk MERV 11 Pleated Furnace & AC Air Filter By Airx
Discount Filters
11% off
$88.44
$99.48
16X25x1 12 Pk MERV 11 Pleated Furnace & AC Air Filter By Airx
Discount Filters
$64.96
24X25x1 Air Filter (4-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 23.88 X 24.88 X 0.75 Inches)
FilterBuy.com
135
$64.96
24X25x1 Air Filter (4-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 23.88 X 24.88 X 0.75 Inches)
FilterBuy.com
$79.98
20X20x4 Air Filter (6-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 X 19.50 X 3.63 Inches)
FilterBuy.com
45K+
$79.98
20X20x4 Air Filter (6-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 X 19.50 X 3.63 Inches)
FilterBuy.com
$63.20
18X24x4 Air Filter (2-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 17.50 X 23.38 X 3.63 Inches)
FilterBuy.com
178
$63.20
18X24x4 Air Filter (2-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 17.50 X 23.38 X 3.63 Inches)
FilterBuy.com
$84.95
$108.95
Genuine Trion Air Bear 259112-102 20X25x5 MERV 11 Furnace & AC Air Filter - 3-Pack
FiltersFast.com
22% off
$84.95
$108.95
Genuine Trion Air Bear 259112-102 20X25x5 MERV 11 Furnace & AC Air Filter - 3-Pack
FiltersFast.com
$67.00
P034519-016-002 - MERV 10 PANEL (23.38" L X 23.38" W X 1.75" D)
Donaldson Torit Filters
$67.00
P034519-016-002 - MERV 10 PANEL (23.38" L X 23.38" W X 1.75" D)
Donaldson Torit Filters
$29.99
$40.00
Genuine Trion Air Bear 255649-102 20X25x5 MERV 8 Furnace & AC Air Filter
FiltersFast.com
25% off
$29.99
$40.00
Genuine Trion Air Bear 255649-102 20X25x5 MERV 8 Furnace & AC Air Filter
FiltersFast.com
$5.97
Filtrete 18 X 20 X 1 MERV 1 Basic Flat Air Filter 2 -Pack | FPL45-2PK-24
Lowe's
$5.97
Filtrete 18 X 20 X 1 MERV 1 Basic Flat Air Filter 2 -Pack | FPL45-2PK-24
Lowe's