25x25x4 Air Filter
Efficiency	APR 1950	APR 1950	APR 1550	APR 1550	APR 650	APR 650	Carbon	Carbon
Equivalent	Merv 13	Merv 13	Merv 11	Merv 11	Merv 8	Merv 8	N/A	N/A
Performance	Best	Best	Better	Better	Good	Good	N/A	N/A
Actual Size	24.5x24.5x3.75	24.75x24.75x3.75	24.5x24.5x3.75	24.75x24.75x3.75	24.5x24.5x3.75	24.75x24.75x3.75	24.5x24.5x3.75	24.75x24.75x3.75
Brand	Accumulair	Accumulair	Accumulair	Accumulair	Accumulair	Accumulair	Accumulair	Accumulair
Item #	FD25X25X4	FD25X25X4N	FA25X25X4	FA25X25X4N	FB25X25X4	FB25X25X4N	FO25X25X4	FO25X25X4N
Purchase	$32.99 Min Qty: 2 Order Options	$32.99 Min Qty: 2 Order Options	$29.03 Min Qty: 2 Order Options	$29.03 Min Qty: 2 Order Options	$25.07 Min Qty: 2 Order Options	$25.07 Min Qty: 2 Order Options	$39.59 Min Qty: 2 Order Options	$39.59 Min Qty: 2 Order Options
Product Page	More Info »	More Info »	More Info »	More Info »	More Info »	More Info »	More Info »	More Info »

25x25x4

Air Filter

Efficiency: APR 1950

Equivalent: Merv 13

Performance: Best

Actual Size: 24.5x24.5x3.75

Brand: Accumulair

Item # FD25X25X4

$32.99

Min Qty: 2

Order Options

Efficiency: APR 1950

Equivalent: Merv 13

Performance: Best

Actual Size: 24.75x24.75x3.75

Brand: Accumulair

Item # FD25X25X4N

$32.99

Min Qty: 2

Order Options

Efficiency: APR 1550

Equivalent: Merv 11

Performance: Better

Actual Size: 24.5x24.5x3.75

Brand: Accumulair

Item # FA25X25X4

$29.03

Min Qty: 2

Order Options

Efficiency: APR 1550

Equivalent: Merv 11

Performance: Better

Actual Size: 24.75x24.75x3.75

Brand: Accumulair

Item # FA25X25X4N

$29.03

Min Qty: 2

Order Options

Efficiency: APR 650

Equivalent: Merv 8

Performance: Good

Actual Size: 24.5x24.5x3.75

Brand: Accumulair

Item # FB25X25X4

$25.07

Min Qty: 2

Order Options

Efficiency: APR 650

Equivalent: Merv 8

Performance: Good

Actual Size: 24.75x24.75x3.75

Brand: Accumulair

Item # FB25X25X4N

$25.07

Min Qty: 2

Order Options

Efficiency: Carbon

Equivalent: N/A

Performance: N/A

Actual Size: 24.5x24.5x3.75

Brand: Accumulair

Item # FO25X25X4

$39.59

Min Qty: 2

Order Options

Efficiency: Carbon

Equivalent: N/A

Performance: N/A

Actual Size: 24.75x24.75x3.75

Brand: Accumulair

Item # FO25X25X4N

$39.59

Min Qty: 2

Order Options

The manufacturer has discontinued the MERV 6 / APR 450 filters from their line up, our suggested replacement is the MERV 8 / APR 650 Gold filter, you may see the Emerald MERV 6 / APR 450 still on the website, we are actively removing that MERV/APR

** The typical ship time for orders is now around 15 to 20 business days **

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25x25x4

Air Filter

Efficiency

APR 1950

APR 1950

APR 1550

APR 1550

APR 650

APR 650

Carbon

Carbon

Equivalent

Merv 13

Merv 13

Merv 11

Merv 11

Merv 8

Merv 8

N/A

N/A

Performance

Best

Best

Better

Better

Good

Good

N/A

N/A

Actual Size

24.5x24.5x3.75

24.75x24.75x3.75

24.5x24.5x3.75

24.75x24.75x3.75

24.5x24.5x3.75

24.75x24.75x3.75

24.5x24.5x3.75

24.75x24.75x3.75

Brand

Accumulair

Accumulair

Accumulair

Accumulair

Accumulair

Accumulair

Accumulair

Accumulair

Item #

FD25X25X4

FD25X25X4N

FA25X25X4

FA25X25X4N

FB25X25X4

FB25X25X4N

FO25X25X4

FO25X25X4N

Purchase

$32.99

Min Qty: 2

$32.99

Min Qty: 2

$29.03

Min Qty: 2

$29.03

Min Qty: 2

$25.07

Min Qty: 2

$25.07

Min Qty: 2

$39.59

Min Qty: 2

$39.59

Min Qty: 2

Product Page

25x25x4

Air Filter

Efficiency: APR 1950

Equivalent: Merv 13

Performance: Best