21x21.5x5 Air Filter

Discover superior air quality with our 21x21.5x5 air filters designed for maximum efficiency and performance

Discover our selection of 21x21.5x5 air filters, designed to enhance the air quality in your home or office. These high-performance filters effectively trap dust, allergens, and other airborne particles, ensuring that you breathe cleaner, fresher air. With various options available, finding the perfect fit for your HVAC system and specific needs is easy and convenient.

Product List

Filterbuy 21x21.5x5 Air Filter MERV 11 Allergen Defense (1-Pack), Pleated HVAC AC Furnace Air Filters Replacement for Trane Perfect Fit and American Standard (Actual Size: 20.00 x 21.09 x 4.97 Inches)

Filterbuy 21x21.5x5 Air Filter MERV 11 Allerg...

Filterbuy

Product Review Score

4.95 out of 5 stars

150 reviews

$66.07

Filterbuy 21x21.5x5 Air Filter MERV 13 Optimal Defense (1-Pack), Pleated HVAC AC Furnace Air Filters Replacement for Trane Perfect Fit and American Standard (Actual Size: 20.00 x 21.09 x 4.97 Inches)

Filterbuy 21x21.5x5 Air Filter MERV 13 Optima...

Filterbuy

Product Review Score

4.8 out of 5 stars

128 reviews

$71.65

Filterbuy 21x21.5x5 Air Filter MERV 13 Optimal Defense (4-Pack), Pleated HVAC AC Furnace Air Filters Replacement for Trane Perfect Fit and American Standard (Actual Size: 20.00 x 21.09 x 4.97 Inches)

Filterbuy 21x21.5x5 Air Filter MERV 13 Optima...

Filterbuy

Product Review Score

4.25 out of 5 stars

116 reviews

$213.12

Filterbuy 21x21.5x5 Air Filter MERV 11 Allergen Defense (4-Pack), Pleated HVAC AC Furnace Air Filters Replacement for Trane Perfect Fit and American Standard (Actual Size: 20.00 x 21.09 x 4.97 Inches)

Filterbuy 21x21.5x5 Air Filter MERV 11 Allerg...

Filterbuy

Product Review Score

4.48 out of 5 stars

134 reviews

$192.88

Honeywell TRN2121T1 Trane Filter BAYFTAH21M 21-1/2" x 21" x 5" MERV 10 - 3 Pack

Honeywell TRN2121T1 Trane Filter BAYFTAH21M 2...

Honeywell

Product Review Score

4.56 out of 5 stars

200 reviews

$243.69

Glasfloss 21 1/2 x 23 5/16 x 1 Carrier Replacement MERV 10 Pleated Air Filters Box of 6

Glasfloss 21 1/2 x 23 5/16 x 1 Carrier Replac...

Glasfloss

Product Review Score

4.27 out of 5 stars

223 reviews

$71.98

Simply Filters 21.5x21.5x1 MERV 8, MPR 600, Air Filter (4 Pack) - Actual Size: 21.5"x21.5"x0.75" HVAC, AC Furnace Air Filter

Simply Filters 21.5x21.5x1 MERV 8, MPR 600, A...

Simply

Product Review Score

4.67 out of 5 stars

16 reviews

$46.99

Filterbuy 20x21.5x1 Air Filter MERV 8 Dust Defense (4-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 19.88 x 21.50 x 0.75 Inches)

Filterbuy 20x21.5x1 Air Filter MERV 8 Dust De...

Filterbuy

Product Review Score

4.38 out of 5 stars

194 reviews

$55.25

Aerostar 19 7/8 x 21 1/2 x 1 MERV 8 Pleated Air Filter, AC Furnace Air Filter, 4 Pack (Actual Size: 19 7/8" x 21 1/2" x 3/4")

Aerostar 19 7/8 x 21 1/2 x 1 MERV 8 Pleated A...

Aerostar

Product Review Score

4.66 out of 5 stars

71 reviews

$36.98 $27.92

MERV 10 Pleated Air Filters, Box of 6

MERV 10 Pleated Filters (6-Pack)

Glasfloss

Product Review Score

4.77 out of 5 stars

87 reviews

$69.98

Air Filter MERV 11 Allergen Defense 4-Pack

MERV 11 Allergen Filters - 4-Pack

Filterbuy

Product Review Score

4.98 out of 5 stars

104 reviews

$62.04

MERV 8 Pleated Air Filters 3-Pack 13x21.5

MERV 8 Pleated Filters 3-Pack

Filterbuy

Product Review Score

4.26 out of 5 stars

68 reviews

$32.10

Finding the right air filter can make a significant difference in maintaining the air quality of your home or workspace. Our 21x21.5x5 air filters are designed to fit snugly in your HVAC system, ensuring efficient filtration and optimal airflow. With a range of MERV ratings available, you can choose the perfect filter to capture dust, allergens, and other airborne particles, allowing you to breathe easier.

Not only do these air filters contribute to a healthier environment, but they can also help prolong the life of your HVAC system by reducing strain on the unit. Regular replacement of your air filters can enhance energy efficiency and lower utility costs, making it a smart investment for any property owner. Explore our selection today and enjoy cleaner air with our high-performance 21x21.5x5 air filters.