This furnace is covered by what we believe to be one of the best warranties in the indoor home comfort industry. The heat exchanger is covered by a Lifetime Limited Warranty to the original, registered homeowner and if it fails during the first 10 years of ownership, we will replace the entire unit for as long as you own your home. This furnace also has a 10-Year Parts Limited Warranty on all functional parts. For a full description of all warranties applicable to this product, please review the consumer brochure or product warranty by clicking on the links above.