20x24x4 Furnace Filter Camfil AP-3. (6-pack) US$96.36 US$72.27

MERV 8 yields high indoor air quality with an exceptional filter that rivals the brand name competition. GREAT VALUE: You pay only $16 each! Pay less, get more. Most affordable product of this size! HIGHLIGHTS MERV...

20x24x4 Furnace Filter Camfil 30/30. (6-pack) US$131.74 US$103.89

MERV 8: Best selling -- 5 Star Rated with Innovative Technology. Ultimate filter for Canadian homeowners. Offers the best value for price, lifespan, and air quality with brand name reliability. Pay only $23 per filter! This...

20x24x4 Furnace Filter Camfil AP-11. (6-pack) US$133.25 US$105.39

MERV 11: High Efficiency -- State of the art filtration capabilities remove allergens, the perfect choice for Canadian homeowners to elevate air quality. Brand name reliability at a low cost: pay only $23.33 per furnace...

20x24x4 Furnace Filter Camfil AP-13. (6-pack) US$173.90 US$141.53

MERV 13: Highest Efficiency filtration. The BEST Canadian homeowners can buy! Better performance, superior results for a cleaner, safer home. And at just $31.33 per filter, you’re paying for superior dust and allergen...