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

Trane-Compatible MERV 8 Air Filter 2-Pack

Trane MERV 8 Filters 2-Pack

Product Review Score

4.41 out of 5 stars

81 reviews

SGD 79.41 SGD 73.10

Aerostar MERV 11 AC Furnace Air Filters (6 Pack)

Aerostar MERV 11 Filters - 6 Pack

Aerostar

Product Review Score

4.4 out of 5 stars

74 reviews

SGD 79.20

MERV 11 Pleated Air Filters 20x21x5 (2-Pack)

MERV 11 Pleated Filters 2-Pack

Filterbuy

Product Review Score

4.36 out of 5 stars

91 reviews

SGD 108.69

Trane Perfect Fit Merv 11 Filter 2 Pack

Trane Merv 11 Filter Pack

Accumulair

Product Review Score

4.87 out of 5 stars

118 reviews

SGD 111.87

Trane American Standard 21.5x21x5 Media Filter Pack

Trane 21.5" Media Filter Pack

Accumulair

Product Review Score

4.66 out of 5 stars

118 reviews

SGD 183.20

Glasfloss Pleated Air Filters, MERV 10, 4-Pack

MERV 10 Pleated Air Filters

Glasfloss

Product Review Score

4.64 out of 5 stars

216 reviews

SGD 67.45

20x21.5x1 MERV 8 Air Filter - 2 Pack

MERV 8 Air Filter Pack

Filterbuy

Product Review Score

4.6 out of 5 stars

128 reviews

SGD 39.31

KFAFK0412XXL Filter - 21 1/2 x 23 1/2 x 1, Replacement for Bryant/Carrier/Payne Fan Duct Coil Filter KFAFK0412XXL Washable Reusable, Ac Filter KFAFK0412XXL -21.5 x23.5 x1 for Models FA4CNC060,1-Pack

KFAFK0412XXL Filter - 21 1/2 x 23 1/2 x 1, Re...

Product Review Score

4.9 out of 5 stars

191 reviews

SGD 58.02

Filterbuy 21x23.5x5 Air Filter MERV 8 Dust Defense (4-Pack), Pleated HVAC AC Furnace Air Filters Replacement for Trane Perfect Fit and American Standard (Actual Size: 20.00 x 23.09 x 4.97 Inches)

Filterbuy 21x23.5x5 Air Filter MERV 8 Dust De...

Filterbuy

Product Review Score

4.63 out of 5 stars

205 reviews

SGD 227.54

Filterbuy 16.5x21x1 Air Filter MERV 8 Dust Defense (2-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 16.50 x 21.50 x 0.75 Inches)

Filterbuy 16.5x21x1 Air Filter MERV 8 Dust De...

Filterbuy

Product Review Score

4.96 out of 5 stars

96 reviews

SGD 42.93

Aerostar 16 3/8 x 21 1/2 x 1 MERV 11 Pleated Air Filter, AC Furnace Air Filter, 4 Pack (Actual Size: 16 3/8"x21 1/2"x3/4")

Aerostar 16 3/8 x 21 1/2 x 1 MERV 11 Pleated...

Aerostar

Product Review Score

4.77 out of 5 stars

169 reviews

SGD 49.78

21x21.5x5 MERV 11 Trane/American Standard BAYFTAH21M Aftermarket Filters (2 Pack)

21x21.5x5 MERV 11 Trane/American Standard BAY...

Spiropure

Product Review Score

4.77 out of 5 stars

208 reviews

SGD 98.90

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.