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
Honeywell TRN2621T1 - Trane Perfect Fit - Honeywell Air Filters

Honeywell TRN2621T1 – Trane Perfect Fit

Size: 26x21x5

MERV: 10

Case: 1 / 2 / 3

$91.95 – $253.50

VIEW PRODUCT
Honeywell TRN2321T1 - Trane Perfect Fit - Honeywell Air Filters

Honeywell TRN2321T1 – Trane Perfect Fit

Size: 23-1/2x21x5

MERV: 10

Case: 1 / 2 / 3

$89.30 – $249.95

VIEW PRODUCT
Honeywell TRN2121T1 - Trane Perfect Fit - Honeywell Air Filters

Honeywell TRN2121T1 – Trane Perfect Fit

Size: 21-1/2x21x5

MERV: 10

Case: 1 / 2 / 3

$84.50 – $236.60

VIEW PRODUCT
Honeywell TRN2127T1 - Trane Perfect Fit - Honeywell Air Filters

Honeywell TRN2127T1 – Trane Perfect Fit

Size: 21x27x5

MERV: 10

Case: 1 / 2 / 3

$94.90 – $265.75

VIEW PRODUCT
Honeywell TRN1727T1 - Trane Perfect Fit - Honeywell Air Filters

Honeywell TRN1727T1 – Trane Perfect Fit

Size: 17-1/2x27x5

MERV: 10

Case: 1 / 2 / 3

$90.95 – $237.95

VIEW PRODUCT
Honeywell TRN1427T1 - Trane Perfect Fit - Honeywell Air Filters

Honeywell TRN1427T1 – Trane Perfect Fit

Size: 14-1/2x27x5

MERV: 10

Case: 1 / 2 / 3

$85.30 – $223.95

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​