12x36x4 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	11.5x35.5x3.75	Actual Size	11.5x35.5x3.75	Actual Size	11.5x35.5x3.75	Actual Size	11.5x35.5x3.75	Actual Size
Brand	Accumulair	Accumulair	Accumulair	Accumulair	Accumulair	Accumulair	Accumulair	Accumulair
Item #	FD12X36X4	FD12X36X4A	FA12X36X4	FA12X36X4A	FB12X36X4	FB12X36X4A	FO12X36X4	FO12X36X4A
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	$26.39 Min Qty: 2 Order Options	$26.39 Min Qty: 2 Order Options	$27.71 Min Qty: 2 Order Options	$27.71 Min Qty: 2 Order Options
Product Page	More Info »	More Info »	More Info »	More Info »	More Info »	More Info »	More Info »	More Info »

12x36x4

Air Filter

Efficiency: APR 1950

Equivalent: Merv 13

Performance: Best

Actual Size: 11.5x35.5x3.75

Brand: Accumulair

Item # FD12X36X4

$32.99

Min Qty: 2

Order Options

Efficiency: APR 1950

Equivalent: Merv 13

Performance: Best

Actual Size: Actual Size

Brand: Accumulair

Item # FD12X36X4A

$32.99

Min Qty: 2

Order Options

Efficiency: APR 1550

Equivalent: Merv 11

Performance: Better

Actual Size: 11.5x35.5x3.75

Brand: Accumulair

Item # FA12X36X4

$29.03

Min Qty: 2

Order Options

Efficiency: APR 1550

Equivalent: Merv 11

Performance: Better

Actual Size: Actual Size

Brand: Accumulair

Item # FA12X36X4A

$29.03

Min Qty: 2

Order Options

Efficiency: APR 650

Equivalent: Merv 8

Performance: Good

Actual Size: 11.5x35.5x3.75

Brand: Accumulair

Item # FB12X36X4

$26.39

Min Qty: 2

Order Options

Efficiency: APR 650

Equivalent: Merv 8

Performance: Good

Actual Size: Actual Size

Brand: Accumulair

Item # FB12X36X4A

$26.39

Min Qty: 2

Order Options

Efficiency: Carbon

Equivalent: N/A

Performance: N/A

Actual Size: 11.5x35.5x3.75

Brand: Accumulair

Item # FO12X36X4

$27.71

Min Qty: 2

Order Options

Efficiency: Carbon

Equivalent: N/A

Performance: N/A

Actual Size: Actual Size

Brand: Accumulair

Item # FO12X36X4A

$27.71

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 **

Ok, got it

Newsletter Signup

Sign up to join our mailing list and be the first to hear about special pricing, new products, and tips to get the most out of your filters!

You can also sign up for our email reminders to change your filter here

Free Shipping Over $70

12x36x4

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

11.5x35.5x3.75

Actual Size

11.5x35.5x3.75

Actual Size

11.5x35.5x3.75

Actual Size

11.5x35.5x3.75

Actual Size

Brand

Accumulair

Accumulair

Accumulair

Accumulair

Accumulair

Accumulair

Accumulair

Accumulair

Item #

FD12X36X4

FD12X36X4A

FA12X36X4

FA12X36X4A

FB12X36X4

FB12X36X4A

FO12X36X4

FO12X36X4A

Purchase

$32.99

Min Qty: 2

$32.99

Min Qty: 2

$29.03

Min Qty: 2

$29.03

Min Qty: 2

$26.39

Min Qty: 2

$26.39

Min Qty: 2

$27.71

Min Qty: 2

$27.71

Min Qty: 2

Product Page

12x36x4

Air Filter

Efficiency: APR 1950

Equivalent: Merv 13

Performance: Best