Lennox HEPA-20 Air Cleaner Parts

The Lennox HEPA 20 air cleaner is a whole house HEPA air cleaner designed to be attached to the ductwork of a home or office. The recommended maintenance of this unit is as follows. Replace the carbon filter every 3 months, the carbon canister every 6 months, the prefilter every 12 months and replace the HEPA filter every 2 to 5 years.