Actual Size: 15.88 x 24.88 x 4.38. Brand: Accumulair. 16x25x5 Lennox X7750 style whole house air filters, specifically engineered to substitute for the name brand Lennox X7750 filters. Fully assembled so no assembly or combs required. MERV rated to ASHRAE 52.2 test classifications establishing operation equal to the name brand Lennox X7750 filters. Notice: Sample air filter image displayed is not to scale and is shown for design purposes. Brand names and Lennox X7750 P/N are shown for air filter replacement identification purposes.