21x21.5x5 Air Filter

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

Product List

16.38x21.5x1 MERV 8 Air Filters (2-Pack)

MERV 8 Air Filters (2-Pack)

Filterbuy

Product Review Score

4.59 out of 5 stars

142 reviews

SGD 36.90

MERV 11 Pleated 21x21 Air Filter Replacement

21x21 MERV 11 Filter

Filterbuy

Product Review Score

4.9 out of 5 stars

195 reviews

SGD 86.28

MERV 10 Pleated Air Filters - Box of 6

MERV 10 Pleated Filters

Glasfloss

Product Review Score

4.97 out of 5 stars

142 reviews

SGD 92.01 SGD 86.59

MERV 11 Pleated Air Filter 6-Pack, 20x21.5x1

MERV 11 Air Filter Pack

Airx Filters

Product Review Score

4.2 out of 5 stars

163 reviews

SGD 90.43

21x22x1 MERV 8 Pleated Air Filter 5-Pack

MERV 8 Pleated Air Filters 5-Pack

Filterbuy

Product Review Score

4.12 out of 5 stars

180 reviews

SGD 86.29

MERV 11 Air Filters 3-Pack for HVAC

MERV 11 HVAC Filters 3-Pack

Filterbuy

Product Review Score

4.28 out of 5 stars

177 reviews

SGD 200.67

Electrostatic Washable A/C Furnace Air Filter 20x21.5

Washable Electrostatic A/C Filter

Product Review Score

4.6 out of 5 stars

212 reviews

SGD 119.60

MERV 13 Pleated Air Filters 20x21x5 (3-Pack)

MERV 13 Air Filters 3-Pack

Filterbuy

Product Review Score

4.6 out of 5 stars

114 reviews

SGD 176.95

21x21x5 MERV 8 Pleated HVAC Air Filter

MERV 8 Pleated Air Filter

Filterbuy

Product Review Score

4.61 out of 5 stars

189 reviews

SGD 76.75

16x21 Air Filter MERV 8 Dust Defense (6-Pack)

16x21 MERV 8 Filter Pack

Filterbuy

Product Review Score

4.25 out of 5 stars

138 reviews

SGD 84.39

Aerostar Multi MERV 8 AC and Oven Filter 13x21

Aerostar MERV 8 Filter 13x21

Aerostar

Product Review Score

4.47 out of 5 stars

191 reviews

SGD 46.54

Simply Filters 20x21.5 MERV 8 Air Filter (6 Pack)

20x21.5 MERV 8 Filters (6 Pack)

Simply

Product Review Score

4.58 out of 5 stars

92 reviews

SGD 77.53