80% AFUE GM9S80-U

  • Up to 80% AFUE performance
  • Ultra Low NOx
  • Single-stage, multi-speed ECM
GMS8 Gas Furnace
Lifetime Heat Exchanger Limited Warranty* 10 Yr Parts Limited Warranty*

* Complete warranty details available from your local dealer or at franklinhvacsystems.com. To receive the Lifetime Heat Exchanger Limited Warranty (good for as long as you own your home) 10-Year Parts Limited Warranty, online registration must be completed within 60 days of installation. Online registration is not required in California or Quebec. The duration of warranty coverage in Texas and Florida differs in some cases.

** For installation in California’s South Coast Air Quality Management District (SCAQMD) only: This furnace meets the SCAQMD Rule 1111 14 ng/J NOx emission limit. This furnace is for the SCAQMD Clean Air Furnace Rebate Program: www.CleanAirFurnaceRebate.com.

Product Features+

  • Heavy-duty stainless-steel tubular heat exchanger
  • Silicon nitride igniter
  • Color-coded low-voltage terminals
  • Multi-speed ECM blower motor with continuous fan speed
  • Fault code LED output

Outstanding Limited Warranty Protection+

If the heat exchanger ever fails in this unit, the original registered owner will receive a new heat exchanger. This unit is also backed by a 10-Year Parts Limited Warranty*. For a full description of all warranties applicable to this product, please review the consumer brochure and warranty certificate by clicking on the specified links.


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.

Energy Consumption

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.