Camfil 16x25x2 Furnace Filter Merv 11. (12-pack) 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 $19.17 per furnace filter! Most popular option for... MSRP: Was: $253.00 Now: $230.00 Add to Cart