Lennox Residential
Email SignupSign up for email news

Need more information?

Our customer-care specialists are ready to answer any questions you may have.

Contact Us

Looking for literature?

You will find brochures for most Lennox® products in our archived documents section. If you need information on a model that isn’t listed, you can request literature by mail.


Frequently Asked Questions

Frequently Asked Questions

< back to list

Lennox HVAC System Filters

When should I change my air filter?

Every month, you should inspect or clean your air filter, or replace it if necessary, to keep your equipment running at peak efficiency.

Popular FAQs in this Category


© 2014 Lennox International Inc.