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The Lennox X6669 MERV 16 Pleated Filter Media is the correct replacement for the following models:
The Lennox X6669 is a pleated box filter for your Pureair air cleaner. This air filter box measures 21x26x4 inches and is a pleated air filter. The Lennox x6669 furnace filter box can also be used to upgrade your older Pureair unit to a MERV 16 level system. This will require a new UVA lamp.
Lennox X6669 MERV 16 Pleated Filter Media Specifications:
The Lennox Pureair air filter box is a MERV 16 filter that will keep your air free from pollutants and contaminants. The pleated filter will trap dust, pollen, dander and other small particulates from your air, keeping them out of the air that you breathe. The Lennox x6669 only needs to be changed every 6 months.