Shop Merv 4 Heater Filters

Sponsored
$172.68
20X25x4 Air Filter (12-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
40
$172.68
20X25x4 Air Filter (12-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
40
$86.72
$182.80
16X24x4 Air Filter (4-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 15.38 X 23.38 X 3.63 Inches)
FilterBuy.com
121K+
52% off
$86.72
$182.80
16X24x4 Air Filter (4-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 15.38 X 23.38 X 3.63 Inches)
FilterBuy.com
121K+
$80.69
16X25x1 12 Pk MERV 4 Fiberglass Furnace & AC Air Filter By CA, Inc.
Discount Filters
$80.69
16X25x1 12 Pk MERV 4 Fiberglass Furnace & AC Air Filter By CA, Inc.
Discount Filters
$108.72
$199.56
16X25x4 Air Filter (4-Pack), Pleated MERV 13 Optimal Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 15.50 X 24.50 X 3.63 Inches)
FilterBuy.com
19K+
45% off
$108.72
$199.56
16X25x4 Air Filter (4-Pack), Pleated MERV 13 Optimal Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 15.50 X 24.50 X 3.63 Inches)
FilterBuy.com
19K+
$103.24
$189.76
20X20x4 Air Filter (4-Pack), Pleated MERV 13 Optimal Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 X 19.50 X 3.63 Inches)
FilterBuy.com
19K+
45% off
$103.24
$189.76
20X20x4 Air Filter (4-Pack), Pleated MERV 13 Optimal Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 X 19.50 X 3.63 Inches)
FilterBuy.com
19K+
$76.20
$131.40
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
792
42% off
$76.20
$131.40
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
792
$31.96
$79.96
16X20x1 Air Filter (4-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 15.50 X 19.50 X 0.75 Inches)
FilterBuy.com
60% off
$31.96
$79.96
16X20x1 Air Filter (4-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 15.50 X 19.50 X 0.75 Inches)
FilterBuy.com
$63.09
20X20x1 12 Pk MERV 4 Fiberglass Furnace & AC Air Filter By CA, Inc.
Discount Filters
$63.09
20X20x1 12 Pk MERV 4 Fiberglass Furnace & AC Air Filter By CA, Inc.
Discount Filters
$51.12
$118.64
24X24x1 MERV 11 Air Filter (4 Pack) For A/C, Furnace & HVAC | Wonderfil Filters
Wonderfil Filters
56% off
$51.12
$118.64
24X24x1 MERV 11 Air Filter (4 Pack) For A/C, Furnace & HVAC | Wonderfil Filters
Wonderfil Filters
$41.24
$108.80
24X24x1 MERV 8 Air Filter (4 Pack) For A/C, Furnace & HVAC | Wonderfil Filters
Wonderfil Filters
62% off
$41.24
$108.80
24X24x1 MERV 8 Air Filter (4 Pack) For A/C, Furnace & HVAC | Wonderfil Filters
Wonderfil Filters
$32.92
16X25x1 Air Filter (4-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 15.50 X 24.50 X 0.75 Inches)
FilterBuy.com
$32.92
16X25x1 Air Filter (4-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 15.50 X 24.50 X 0.75 Inches)
FilterBuy.com
$141.16
16X16x2 12 Pk MERV 4 Fiberglass Furnace & AC Air Filter By CA, Inc.
Discount Filters
$141.16
16X16x2 12 Pk MERV 4 Fiberglass Furnace & AC Air Filter By CA, Inc.
Discount Filters
$121.56
20X25x2 12 Pk MERV 4 Fiberglass Furnace & AC Air Filter By CA, Inc.
Discount Filters
$121.56
20X25x2 12 Pk MERV 4 Fiberglass Furnace & AC Air Filter By CA, Inc.
Discount Filters
$73.96
$149.96
20X20x4 Air Filter (4-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
513
50% off
$73.96
$149.96
20X20x4 Air Filter (4-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
513
$80.84
10X30x1 12 Pk MERV 4 Fiberglass Furnace & AC Air Filter By CA, Inc.
Discount Filters
$80.84
10X30x1 12 Pk MERV 4 Fiberglass Furnace & AC Air Filter By CA, Inc.
Discount Filters
$67.54
MERV-4 Course Particulate Fiber-Trapper Pre-Filter 12 Pack
Jon-Don
$67.54
MERV-4 Course Particulate Fiber-Trapper Pre-Filter 12 Pack
Jon-Don
$50.92
20X20x4 Air Filter (2-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
2K+
$50.92
20X20x4 Air Filter (2-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
2K+
$91.60
$118.37
SG4PR Bestair MERV 11 Replacement Air Filter By Bestairpro, 4 Pk | Furnace & AC Filter | Pleated
Discount Filters
22% off
$91.60
$118.37
SG4PR Bestair MERV 11 Replacement Air Filter By Bestairpro, 4 Pk | Furnace & AC Filter | Pleated
Discount Filters
$122.40
25X25x4 Air Filter (4-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 24.50 X 24.50 X 3.63 Inches)
FilterBuy.com
$122.40
25X25x4 Air Filter (4-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 24.50 X 24.50 X 3.63 Inches)
FilterBuy.com
$134.40
21X24.5X5 Air Filter (4-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement For Rheem, Ruud, & Protech
FilterBuy.com
$134.40
21X24.5X5 Air Filter (4-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement For Rheem, Ruud, & Protech
FilterBuy.com
$122.22
20X25x4 Air Filter (6-Pack), Pleated MERV 11 Allergen Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 X 24.50 X 3.63 Inches)
FilterBuy.com
8K+
$122.22
20X25x4 Air Filter (6-Pack), Pleated MERV 11 Allergen Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 X 24.50 X 3.63 Inches)
FilterBuy.com
8K+
$122.92
$213.52
17.5X21x5 Air Filter (4-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement For Rheem, Ruud, & Protech
FilterBuy.com
42% off
$122.92
$213.52
17.5X21x5 Air Filter (4-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement For Rheem, Ruud, & Protech
FilterBuy.com
$89.10
20X25x4 Air Filter (5-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
42
$89.10
20X25x4 Air Filter (5-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
42
$135.96
20X25x4 Air Filter (6-Pack), Pleated MERV 13 Optimal Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 X 24.50 X 3.63 Inches)
FilterBuy.com
217
$135.96
20X25x4 Air Filter (6-Pack), Pleated MERV 13 Optimal Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 X 24.50 X 3.63 Inches)
FilterBuy.com
217
$74.96
16X25x4 Air Filter (4-Pack), Pleated MERV 11 Allergen Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 15.50 X 24.50 X 3.63 Inches)
FilterBuy.com
17K+
$74.96
16X25x4 Air Filter (4-Pack), Pleated MERV 11 Allergen Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 15.50 X 24.50 X 3.63 Inches)
FilterBuy.com
17K+
$51.75
Filtrete 20X25x4, AC Furnace Air Filter, MPR 1000 DP, Micro Allergen Defense Deep Pleat, 2-Pack (Actual Dimensions 19.88 X 24.63 X 4.31)
Amazon.com
Free shipping
$51.75
Filtrete 20X25x4, AC Furnace Air Filter, MPR 1000 DP, Micro Allergen Defense Deep Pleat, 2-Pack (Actual Dimensions 19.88 X 24.63 X 4.31)
Amazon.com
Free shipping
$47.70
Filtrete 16X25x4 AC Furnace Air Filter, MPR 1550, MERV 12, Fits Lennox & Honeywell, CERTIFIED Asthma & Allergy Friendly, Electrostatic Air Cleaning
Amazon.com
Free shipping
$47.70
Filtrete 16X25x4 AC Furnace Air Filter, MPR 1550, MERV 12, Fits Lennox & Honeywell, CERTIFIED Asthma & Allergy Friendly, Electrostatic Air Cleaning
Amazon.com
Free shipping
$79.99
20 X 20 X 4 Aerostar Air Filter (4 Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement For Your Home Or Business
Factory Direct Filters
1
$79.99
20 X 20 X 4 Aerostar Air Filter (4 Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement For Your Home Or Business
Factory Direct Filters
1
$44.16
MERV-4 Course Particulate "Fiber-Trapper" Pre-Filter, 16" X 16" X 1" 12 Pack
Jon-Don
$44.16
MERV-4 Course Particulate "Fiber-Trapper" Pre-Filter, 16" X 16" X 1" 12 Pack
Jon-Don
$3.10
Hart & Cooley 274200200 20" X 20" X 1" Fiberglass Throw Away Replacement Filter | Supplyhouse.Com
SupplyHouse.com
37
$3.10
Hart & Cooley 274200200 20" X 20" X 1" Fiberglass Throw Away Replacement Filter | Supplyhouse.Com
SupplyHouse.com
37
$47.56
Filtrete 16X25x4, AC Furnace Air Filter, MPR 1000 DP, Micro Allergen Defense Deep Pleat, 2-Pack (Actual Dimensions 15.88 X 24.56 X 4.31)
Amazon.com
545
Free shipping
$47.56
Filtrete 16X25x4, AC Furnace Air Filter, MPR 1000 DP, Micro Allergen Defense Deep Pleat, 2-Pack (Actual Dimensions 15.88 X 24.56 X 4.31)
Amazon.com
545
$60.44
93/4 X 93/4 X 1 Aerostar Air Filter (4 Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement For Your Home Or Business
Factory Direct Filters
$60.44
93/4 X 93/4 X 1 Aerostar Air Filter (4 Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement For Your Home Or Business
Factory Direct Filters
$390.60
HEPA Filter 24 X 24 X 12
Filter Junkie
$390.60
HEPA Filter 24 X 24 X 12
Filter Junkie
$47.22
True Blue 116241 Furnace Air Filter 16 X 24 X 1
Walmart
Free shipping
$47.22
True Blue 116241 Furnace Air Filter 16 X 24 X 1
Walmart
Free shipping
$4.93
Hart & Cooley 274140300 14" X 30" X 1" Fiberglass Throw Away Replacement Filter | Supplyhouse.Com
SupplyHouse.com
58
$4.93
Hart & Cooley 274140300 14" X 30" X 1" Fiberglass Throw Away Replacement Filter | Supplyhouse.Com
SupplyHouse.com
58
$33.22
Honeywell Home FC100A1011 20" X 20" X 4" Media Air Filter | Supplyhouse.Com
SupplyHouse.com
1K+
$33.22
Honeywell Home FC100A1011 20" X 20" X 4" Media Air Filter | Supplyhouse.Com
SupplyHouse.com
1K+
See more
See less
    Some results have been hidden because they may be inaccessible to you.Show inaccessible results
    See more images

    Shop Merv 4 Heater Filters

    Sponsored
    $172.68
    20X25x4 Air Filter (12-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
    40
    $172.68
    20X25x4 Air Filter (12-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
    40
    $86.72
    $182.80
    16X24x4 Air Filter (4-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 15.38 X 23.38 X 3.63 Inches)
    FilterBuy.com
    121K+
    52% off
    $86.72
    $182.80
    16X24x4 Air Filter (4-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 15.38 X 23.38 X 3.63 Inches)
    FilterBuy.com
    121K+
    $80.69
    16X25x1 12 Pk MERV 4 Fiberglass Furnace & AC Air Filter By CA, Inc.
    Discount Filters
    $80.69
    16X25x1 12 Pk MERV 4 Fiberglass Furnace & AC Air Filter By CA, Inc.
    Discount Filters
    $108.72
    $199.56
    16X25x4 Air Filter (4-Pack), Pleated MERV 13 Optimal Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 15.50 X 24.50 X 3.63 Inches)
    FilterBuy.com
    19K+
    45% off
    $108.72
    $199.56
    16X25x4 Air Filter (4-Pack), Pleated MERV 13 Optimal Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 15.50 X 24.50 X 3.63 Inches)
    FilterBuy.com
    19K+
    $103.24
    $189.76
    20X20x4 Air Filter (4-Pack), Pleated MERV 13 Optimal Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 X 19.50 X 3.63 Inches)
    FilterBuy.com
    19K+
    45% off
    $103.24
    $189.76
    20X20x4 Air Filter (4-Pack), Pleated MERV 13 Optimal Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 X 19.50 X 3.63 Inches)
    FilterBuy.com
    19K+
    $76.20
    $131.40
    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
    792
    42% off
    $76.20
    $131.40
    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
    792
    $31.96
    $79.96
    16X20x1 Air Filter (4-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 15.50 X 19.50 X 0.75 Inches)
    FilterBuy.com
    60% off
    $31.96
    $79.96
    16X20x1 Air Filter (4-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 15.50 X 19.50 X 0.75 Inches)
    FilterBuy.com
    $63.09
    20X20x1 12 Pk MERV 4 Fiberglass Furnace & AC Air Filter By CA, Inc.
    Discount Filters
    $63.09
    20X20x1 12 Pk MERV 4 Fiberglass Furnace & AC Air Filter By CA, Inc.
    Discount Filters
    $51.12
    $118.64
    24X24x1 MERV 11 Air Filter (4 Pack) For A/C, Furnace & HVAC | Wonderfil Filters
    Wonderfil Filters
    56% off
    $51.12
    $118.64
    24X24x1 MERV 11 Air Filter (4 Pack) For A/C, Furnace & HVAC | Wonderfil Filters
    Wonderfil Filters
    $41.24
    $108.80
    24X24x1 MERV 8 Air Filter (4 Pack) For A/C, Furnace & HVAC | Wonderfil Filters
    Wonderfil Filters
    62% off
    $41.24
    $108.80
    24X24x1 MERV 8 Air Filter (4 Pack) For A/C, Furnace & HVAC | Wonderfil Filters
    Wonderfil Filters
    $32.92
    16X25x1 Air Filter (4-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 15.50 X 24.50 X 0.75 Inches)
    FilterBuy.com
    $32.92
    16X25x1 Air Filter (4-Pack), Pleated MERV 8 Dust Defense HVAC AC Furnace Air Filters Replacement (Actual Size: 15.50 X 24.50 X 0.75 Inches)
    FilterBuy.com
    $141.16
    16X16x2 12 Pk MERV 4 Fiberglass Furnace & AC Air Filter By CA, Inc.
    Discount Filters
    $141.16
    16X16x2 12 Pk MERV 4 Fiberglass Furnace & AC Air Filter By CA, Inc.
    Discount Filters
    $121.56
    20X25x2 12 Pk MERV 4 Fiberglass Furnace & AC Air Filter By CA, Inc.
    Discount Filters
    $121.56
    20X25x2 12 Pk MERV 4 Fiberglass Furnace & AC Air Filter By CA, Inc.
    Discount Filters
    $73.96
    $149.96
    20X20x4 Air Filter (4-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
    513
    50% off
    $73.96
    $149.96
    20X20x4 Air Filter (4-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
    513
    $80.84
    10X30x1 12 Pk MERV 4 Fiberglass Furnace & AC Air Filter By CA, Inc.
    Discount Filters
    $80.84
    10X30x1 12 Pk MERV 4 Fiberglass Furnace & AC Air Filter By CA, Inc.
    Discount Filters
    $67.54
    MERV-4 Course Particulate Fiber-Trapper Pre-Filter 12 Pack
    Jon-Don
    $67.54
    MERV-4 Course Particulate Fiber-Trapper Pre-Filter 12 Pack
    Jon-Don
    $50.92
    20X20x4 Air Filter (2-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
    2K+
    $50.92
    20X20x4 Air Filter (2-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
    2K+
    $91.60
    $118.37
    SG4PR Bestair MERV 11 Replacement Air Filter By Bestairpro, 4 Pk | Furnace & AC Filter | Pleated
    Discount Filters
    22% off
    $91.60
    $118.37
    SG4PR Bestair MERV 11 Replacement Air Filter By Bestairpro, 4 Pk | Furnace & AC Filter | Pleated
    Discount Filters

    • DiscountFilters Official Site | DiscountFilters.com Official

      https://www.discountfilters.com
      SponsoredDiscount Filters provides the best air filters to keep your home's air clean and healthy. Discount Filters: Your One-Stop Shop for All Your Air Filter Needs

      Free Shipping Sitewide · Made In The USA · High Quality Filters · Free Shipping, No Minimum