Description
Actual dimensions are 20.7 x 26.2 x 5. Accumulair brand: 21x27x5 American Standard BAYFRAME21A compatible whole house filters, specifically built to replace the original brand American Standard BAYFRAME21A filters. Completely box-formed - no forming or combs required. MERV rated to ASHRAE ratings ensuring operation equal to the original brand American Standard BAYFRAME21A filters. Photo: Example filter pic shown is not true to size and is included to show construction purposes only. Brand names and American Standard BAYFRAME21A P/N are used for filter substitution identification purposes.