GMH8/GDH8 Gas Furnace   Up to 80% AFUE Multi-Position Installation Dual$aver (Convertible), Multi-Speed   Outstanding Warranty Protection*   The heat exchanger on this furnace 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. This furnace also has a 10-Year Parts Limited Warranty* on all other 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 below.   Product Features  Dual-diameter tubular heat exchanger Energy-saving, quiet four-speed circulator motor Durable 110-volt Silicon Nitride Igniter Electronic control board with self-diagnostics

Unlike conventional, single-stage furnace technology, Goodman’s Dual$aver technology eliminates the temperature swings resulting from abrupt, high-stage stops-and-starts of the furnace by operating at a low heating state the majority of the time. This gas furnace has an AFUE rating of 80%, which means that 80 cents of every $1.00 of heating energy expense warms your home.     * Complete warranty details available from your local dealer or by clicking below on the Product Warranty link. To receive the Lifetime Heat Exchanger Limited Warranty (good for as long as you own your home), the 10-Year Unit Replacement Limited Warranty and the 10-Year Parts Limited Warranty, online registration must be completed within 60 days of installation. Online registration is not required in California or Quebec. Additional Information   Before purchasing this appliance, read important information about its estimated annual energy consumption, yearly operating cost, or energy efficiency rating that is available from your retailer.     Consumer Brochure      Product Specifications     Product Warranty      Rebate Incentives