Protect your family and your HVAC system with the AprilAire 1310 Whole Home Air Purifier. The 1310 features an unpainted steel cabinet and comes with a 310 Clean Air Filter, which will remove more dust and particulate from your living space. This model has a nominal size of 20 in.es x 20 in.es - one of many sizes available for contractors to install into a wide variety of HVAC systems. Every Genuine AprilAire Air Filter is manufactured and sold with our Pure Fit Promise, which guarantees that our filters will fit flawlessly into your AprilAire Whole-Home Air Purifier and deliver purer healthier air. Every system needs an air purifier - choose AprilAire for a healthier, cleaner home. Protects your HVAC system and offers superior filtration performance to 1 in. filters. Comes with 310 Clean Air Filter, which has more than 9 times the filtration area found in 1 in. filters. Guaranteed with our Pure Fit Promise: Self Seal technology, interlocking rails, and Clean Coil Commitment. Easy to maintain - simply change the Air Purifier's filter once up to every 12 months. Versatile installation - compatible with systems located in basements, attics, closets, and more. Also compatible with the 313 Healthy Home MERV 13 Filter. Color: Silver.