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Shop by Size
1 Inch Filters
2 & 3 Inch Filters
4 Inch Filters
5 & 6 Inch Filters
Shop by MERV
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Shop by MERV
MERV 6
MERV 7 Carbon
MERV 8
MERV 11
MERV 11 + Carbon Defense
MERV 13
Shop by Brand
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Shop by Brand
AeroStar
Air Bear
AprilAire
Carrier
Coway
Honeywell
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Trane
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Furnace Filters
Specialty Filters
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Specialty Filters
Industrial Filters
Expand submenu
Industrial Filters
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Coway
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All 4 inch Filters
50 products
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Featured
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Price, high to low
Date, old to new
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(65)
Out of stock
(77)
Price
4 Inch HVAC & Furnace Filters
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108 products
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Best selling
Alphabetically, A-Z
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Price, low to high
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Date, old to new
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10x10x4 - Air Filter
from
$168
30
from
$168.30
Regular price
$210
38
$210.38
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10x14x4 - Air Filter
from
$135
30
from
$135.30
Regular price
$169
13
$169.13
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10x16x4 - Air Filter
from
$135
30
from
$135.30
Regular price
$169
13
$169.13
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10x18x4 - Air Filter
from
$135
30
from
$135.30
Regular price
$169
13
$169.13
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10x20x4 - Air Filter
from
$1,295
28
from
$1,295.28
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Add to cart
10x24x4 - Air Filter
from
$135
30
from
$135.30
Regular price
$169
13
$169.13
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Add to cart
12 1/2x24 1/2x4 - Air Filter
from
$135
30
from
$135.30
Regular price
$169
13
$169.13
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Add to cart
12 1/4x15x4 - Air Filter
from
$135
30
from
$135.30
Regular price
$169
13
$169.13
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12x12x4 - Air Filter
from
$1,295
28
from
$1,295.28
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12x16x4 Commercial HVAC Filter
from
$1,295
28
from
$1,295.28
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12x18x4 - Air Filter
from
$168
30
from
$168.30
Regular price
$210
38
$210.38
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12x20x4 Commercial HVAC Filter
from
$1,295
28
from
$1,295.28
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12x24x4 Commercial HVAC Air Filter
from
$54
99
from
$54.99
Regular price
$69
80
$69.80
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Add to cart
12x30x4 - Air Filter
from
$158
46
from
$158.46
Regular price
$198
08
$198.08
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Add to cart
12x36x4 - Air Filter
from
$200
12
from
$200.12
Regular price
$250
15
$250.15
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Add to cart
13x21 1/2x4 - Air Filter
from
$135
30
from
$135.30
Regular price
$169
13
$169.13
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14x14x4 - Air Filter
from
$1,176
96
from
$1,176.96
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14x16x4 - Air Filter
from
$1,412
58
from
$1,412.58
"Close (esc)"
14x18x4 - Air Filter
from
$1,295
28
from
$1,295.28
"Close (esc)"
14x20x4 Commercial HVAC Filter
from
$1,295
28
from
$1,295.28
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Add to cart
14x22x4 - Air Filter
from
$185
28
from
$185.28
Regular price
$231
60
$231.60
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Aerostar 14x24x4 - Furnace Air Filters
from
$1,412
58
from
$1,412.58
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14x25x4 Commercial HVAC Filter
from
$1,412
58
from
$1,412.58
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14x30x4 - Air Filter
from
$1,412
58
from
$1,412.58
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Add to cart
14x36x4 - Air Filter
from
$240
94
from
$240.94
Regular price
$301
18
$301.18
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15x20x4 - Air Filter
from
$1,295
28
from
$1,295.28
"Close (esc)"
15x25x4 Commercial HVAC Filter
from
$1,412
58
from
$1,412.58
"Close (esc)"
Add to cart
15x30x4 - Air Filter
from
$158
46
from
$158.46
Regular price
$198
08
$198.08
"Close (esc)"
Add to cart
15x36x4 - Air Filter
from
$175
16
from
$175.16
Regular price
$218
95
$218.95
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Add to cart
16 1/2x21 1/2x4 - Air Filter
from
$141
72
from
$141.72
Regular price
$177
15
$177.15
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Add to cart
16 1/2x21 5/8x4 - Air Filter
from
$185
28
from
$185.28
Regular price
$231
60
$231.60
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16 1/4x21 1/2x4 - Air Filter
from
$1,412
58
from
$1,412.58
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Add to cart
16 3/8x21 1/2x4 - Air Filter
from
$141
72
from
$141.72
Regular price
$177
15
$177.15
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Add to cart
16x16x4 - Air Filter
from
$138
94
from
$138.94
Regular price
$173
68
$173.68
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16x18x4 - Air Filter
from
$1,412
58
from
$1,412.58
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16x20x4 - White Rogers Deep Pleat Air Filter
White Rodgers
from
$54
48
from
$54.48
Regular price
$68
10
$68.10
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16x20x4 Commercial HVAC Air Filter
Aerostar
from
$53
48
from
$53.48
Regular price
$66
85
$66.85
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16x20x4 Whole House Air Filter for White Rogers FR1000M-108
White Rodgers
from
$60
30
from
$60.30
Regular price
$75
38
$75.38
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16x21x4 - Air Filter
from
$1,412
58
from
$1,412.58
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16x22x4 - Air Filter
from
$1,412
58
from
$1,412.58
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