About Mainstream Air Filters

Resources / FAQ

My Account

Air Filters - HVAC Filters - Furnace Filters - A/C Filters

All Air Filters

Browse our extensive catalog of hand selected air filters!

Product Filters

Filtered (14)
Filters
Search
Size
Brand
Thickness
MERV
Show (14)
Cancel
Rheem Protech PD540045 Media Air Filter

Rheem Protech PD540045 Exact-Fit

Size: 24-1/2x28x5

MERV: 8

Case: 2

$167.90

VIEW PRODUCT
Rheem Protech PD540044 Media Air Filter

Rheem Protech PD540044 Exact-Fit

Size: 21x24-1/2x5

MERV: 8

Case: 2

$128.50

VIEW PRODUCT
Rheem Protech PD540043 Media Air Filter

Rheem Protech PD540043 Exact-Fit

Size: 21x28x5

MERV: 8

Case: 2

$159.80

VIEW PRODUCT
Rheem Protech PD540042 Media Air Filter

Rheem Protech PD540042 Exact-Fit

Size: 21x21x5

MERV: 8

Case: 2

$112.95

VIEW PRODUCT
Rheem Protech PD540041 Media Air Filter

Rheem Protech PD540041 Exact-Fit

Size: 17-1/2x28x5

MERV: 8

Case: 2

$134.60

VIEW PRODUCT
Rheem Protech PD540040 Media Air Filter

Rheem Protech PD540040 Exact-Fit

Size: 17-1/2x21x5

MERV: 8

Case: 2

$109.80

VIEW PRODUCT
Columbia GPF HP8 12 24 4 Media Air Filter - Columbia Air Filters - 12x24x4 Air Filter

Columbia GPF HP8 12 24 4

Size: 12x24x4

MERV: 8

Case: 6

$193.95

VIEW PRODUCT
Columbia GPF HP8 14 20 4 Media Air Filter - Columbia Air Filters - 14x20x4 Air Filter

Columbia GPF HP8 14 20 4

Size: 14x20x4

MERV: 8

Case: 6

$206.95

VIEW PRODUCT
Columbia GPF HP8 24 24 4 Media Air Filter - Columbia Air Filters - 24x24x4 Air Filters

Columbia GPF HP8 24 24 4

Size: 24x24x4

MERV: 8

Case: 6

$178.80

VIEW PRODUCT

Contact Us

Phone
Email

Company Policy

About Mainstream Air Filters

Refund & Return Policy

Privacy Policy

Services

HVAC Contractors

Filter Subscription

Knowledge Center

Resources / FAQ

© 2025 All rights reserved

Made with Elementor​