The Space-Gard SG4PR-B, Aprilaire 401 is a compatible replacement for the Aprilaire 401 air filter. This air filter fits the following air cleaner models:
The Aprilaire #401 MERV 11 Compatible Media Filter 2-Pack is a two pack of compatible replacement air filters for the Aprilaire Model 2400 Air Cleaner. This BestAir furnace filter measures approximately 16" x 27" x 6" and features a MERV 11 rating for the reduction of many airborne particulates, such as dust, dirt, and tiny allergens. This MERV 11 filter media expands from a collapsed accordion shape to fit within the plastic frame of your 2400 model air cleaner. This pleated air filter can last between six months to two years depending on usage and air quality.
Space-Gard MERV 11 Compatible Media Filter 2-Pack specifications: