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21x22x4

Air Filter

21x22x4 Accumulair Furnace Filter Merv 13 21x22x4 Accumulair Furnace Filter Merv 13 21x22x4 Accumulair Furnace Filter Merv 11 21x22x4 Accumulair Furnace Filter Merv 11 21x22x4 Accumulair Furnace Filter Merv 8 21x22x4 Accumulair Furnace Filter Merv 8 21x22x4 Accumulair Furnace Filter Merv 6 21x22x4 Accumulair Furnace Filter Merv 6 21x22x4 Accumulair Furnace Filter Carbon 21x22x4 Accumulair Furnace Filter Carbon

Efficiency

APR 1950
APR 1950
APR 1550
APR 1550
APR 650
APR 650
APR 450
APR 450
Carbon
Carbon

Equivalent

Merv 13
Merv 13
Merv 11
Merv 11
Merv 8
Merv 8
Merv 6
Merv 6
N/A
N/A

Performance

Best
Best
Better
Better
Good
Good
Basic
Basic
N/A
N/A

Actual Size

20.5x21.5x3.75
Actual Size
20.5x21.5x3.75
Actual Size
20.5x21.5x3.75
Actual Size
20.5x21.5x3.75
Actual Size
20.5x21.5x3.75
Actual Size

Brand

Accumulair
Accumulair
Accumulair
Accumulair
Accumulair
Accumulair
Accumulair
Accumulair
Accumulair
Accumulair

Item #

FD21X22X4
FD21X22X4A
FA21X22X4
FA21X22X4A
FB21X22X4
FB21X22X4A
FC21X22X4
FC21X22X4A
FO21X22X4
FO21X22X4A

Purchase

$23.99

Min Qty: 2

$23.99

Min Qty: 2

$20.99

Min Qty: 2

$20.99

Min Qty: 2

$15.99

Min Qty: 2

$15.99

Min Qty: 2

$13.99

Min Qty: 2

$13.99

Min Qty: 2

$26.99

Min Qty: 2

$28.99

Min Qty: 2

Product Page

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21x22x4

Air Filter

Efficiency: APR 1950
Equivalent: Merv 13
Performance: Best
Actual Size: 20.5x21.5x3.75
Brand: Accumulair
Item # FD21X22X4

$23.99

Min Qty: 2
Efficiency: APR 1950
Equivalent: Merv 13
Performance: Best
Actual Size: Actual Size
Brand: Accumulair
Item # FD21X22X4A

$23.99

Min Qty: 2
Efficiency: APR 1550
Equivalent: Merv 11
Performance: Better
Actual Size: 20.5x21.5x3.75
Brand: Accumulair
Item # FA21X22X4

$20.99

Min Qty: 2
Efficiency: APR 1550
Equivalent: Merv 11
Performance: Better
Actual Size: Actual Size
Brand: Accumulair
Item # FA21X22X4A

$20.99

Min Qty: 2
Efficiency: APR 650
Equivalent: Merv 8
Performance: Good
Actual Size: 20.5x21.5x3.75
Brand: Accumulair
Item # FB21X22X4

$15.99

Min Qty: 2
Efficiency: APR 650
Equivalent: Merv 8
Performance: Good
Actual Size: Actual Size
Brand: Accumulair
Item # FB21X22X4A

$15.99

Min Qty: 2
Efficiency: APR 450
Equivalent: Merv 6
Performance: Basic
Actual Size: 20.5x21.5x3.75
Brand: Accumulair
Item # FC21X22X4

$13.99

Min Qty: 2
Efficiency: APR 450
Equivalent: Merv 6
Performance: Basic
Actual Size: Actual Size
Brand: Accumulair
Item # FC21X22X4A

$13.99

Min Qty: 2
Efficiency: Carbon
Equivalent: N/A
Performance: N/A
Actual Size: 20.5x21.5x3.75
Brand: Accumulair
Item # FO21X22X4

$26.99

Min Qty: 2
Efficiency: Carbon
Equivalent: N/A
Performance: N/A
Actual Size: Actual Size
Brand: Accumulair
Item # FO21X22X4A

$28.99

Min Qty: 2

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