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1 Inch Filters
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Shop by MERV
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Shop by Brand
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Air Bear
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Carrier
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Trane
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Furnace Filters
Specialty Filters
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Specialty Filters
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Industrial Filters
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All 4 inch Filters
50 products
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Price, high to low
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(97)
Price
4 Inch HVAC & Furnace Filters
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107 products
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Price, low to high
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16x24x4 Commercial HVAC Air Filter
from
$68
60
from
$68.60
Regular price
$85
75
$85.75
Save 20%
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16x25x4 Commercial HVAC Air Filter
from
$42
99
from
$42.99
Regular price
$48
99
$48.99
Save 12%
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16x30x4 - Air Filter
from
$1,882
74
from
$1,882.74
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Add to cart
16x32x4 - Air Filter
from
$240
94
from
$240.94
Regular price
$301
18
$301.18
Save 20%
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Add to cart
16x36x4 - Air Filter
from
$92
14
from
$92.14
Regular price
$115
18
$115.18
Save 20%
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Add to cart
17x22x4 - Air Filter
from
$158
46
from
$158.46
Regular price
$198
08
$198.08
Save 20%
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18x18x4 - Air Filter
from
$1,530
90
from
$1,530.90
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18x20x4 Commercial HVAC Filter
from
$1,530
90
from
$1,530.90
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18x22x4 - Air Filter
from
$1,530
90
from
$1,530.90
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Add to cart
18x24x4 Commercial HVAC Air Filter
from
$65
37
from
$65.37
Regular price
$81
71
$81.71
Save 20%
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18x25x4 - Air Filter
from
$1,530
90
from
$1,530.90
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18x30x4 - Air Filter
from
$1,647
12
from
$1,647.12
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18x36x4 - Air Filter
from
$127
40
from
$127.40
Regular price
$159
25
$159.25
Save 20%
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19 7/8x21 1/2x4 - Air Filter
from
$1,588
50
from
$1,588.50
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Add to cart
20x20x4 Commercial HVAC Air Filter
from
$52
99
from
$52.99
Regular price
$59
99
$59.99
Save 12%
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20x21 1/2x4 - Air Filter
from
$250
10
from
$250.10
Regular price
$312
63
$312.63
Save 20%
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20x21x4 - Air Filter
from
$1,530
90
from
$1,530.90
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20x22 1/4x4 - Air Filter
from
$1,530
90
from
$1,530.90
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20x22x4 - Air Filter
from
$1,530
90
from
$1,530.90
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20x23x4 Commercial HVAC Filter
from
$1,530
90
from
$1,530.90
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20x24x4 Commercial HVAC Air Filter
from
$50
68
from
$50.68
Regular price
$63
35
$63.35
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20x25x4 Commercial HVAC Air Filter
from
$37
99
from
$37.99
Regular price
$58
60
$58.60
Save 35%
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20x30x4 Commercial HVAC & Air Filter
from
$1,530
90
from
$1,530.90
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20x32x4 - Air Filter
from
$2,236
56
from
$2,236.56
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Add to cart
20x34x4 - Air Filter
from
$233
38
from
$233.38
Regular price
$291
73
$291.73
Save 20%
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20x36x4 - Air Filter
from
$686
52
from
$686.52
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21 1/2x21 1/2x4 - Air Filter
from
$80
82
from
$80.82
Regular price
$101
03
$101.03
Save 20%
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21 1/2x23 1/2x4 - Air Filter
from
$103
54
from
$103.54
Regular price
$129
42
$129.42
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21 1/2x23 3/8x4 - Air Filter
from
$194
62
from
$194.62
Regular price
$243
28
$243.28
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21 1/2x23 5/16x4 - Air Filter
from
$158
46
from
$158.46
Regular price
$198
08
$198.08
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21 1/4x21 1/4x4 - Air Filter
from
$158
46
from
$158.46
Regular price
$198
08
$198.08
Save 20%
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21 1/4x23 1/4x4 - Air Filter
from
$222
32
from
$222.32
Regular price
$277
90
$277.90
Save 20%
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21x21x4 Commercial HVAC Filter
from
$1,588
50
from
$1,588.50
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21x23x4 - Air Filter
from
$1,588
50
from
$1,588.50
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22x22x4 - Air Filter
from
$1,588
50
from
$1,588.50
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22x24x4 - Air Filter
from
$1,588
50
from
$1,588.50
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22x26x4 - Air Filter
from
$621
18
from
$621.18
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22x28x4 - Air Filter
from
$1,588
50
from
$1,588.50
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22x36x4 - Air Filter
from
$200
12
from
$200.12
Regular price
$250
15
$250.15
Save 20%
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24x24x4 Commercial HVAC Air Filter
from
$36
29
from
$36.29
Regular price
$45
36
$45.36
Save 20%
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