Honeywell Merve 11 Filter
 
	
Furnace filters should be changed every 30 to 90 days. 
	
20" x 25"x4" MERV 11Nominal Size: 20" x 25" x 4-3/8"
	
Actual Size: 19-7/8" x 24-3/4” x 4- 3/8”