97% AFUE AMVM97

  • Up to 98% AFUE
  • Stainless-steel tubular primary heat exchanger
  • ComfortBridge™ Technology
  • Efficient and quiet variable-speed circulator motor
FKN-90-upflw-CB-CC
20-year-badge 10 Yr Parts Limited Warranty

* Complete warranty details available from your local dealer/contractor 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 Florida, California or Quebec. The duration of warranty coverage in Texas and Florida differs in some cases. Other limitations and exclusions apply; refer to complete warranty details for a full list of limitations and exclusions.

** Can no longer be installed in California’s South Coast Air Quality Management District (SCAQMD) on or after October 1, 2019.

Product Features+

  • 98% AFUE
  • Stainless-steel tubular primary heat exchanger
  • Integrated communicating ComfortBridge™ Technology
  • Efficient and quiet variable-speed circulator motor
  • Durable silicon nitride igniter
  • Self calibrating modulating gas valve
  • Quiet, variable-speed, induced-draft blower
  • Continuous air circulation
  • Self-diagnostic control board
  • Heavy-gauge steel cabinet
  • Thermally insulated cabinet

Outstanding Limited Warranty Protection+

This furnace is covered by what we believe to be one of the best warranties in the indoor home comfort industry. In addition to covering the heat exchanger with a Lifetime Limited Warranty to the original, registered homeowner, if the heat exchanger fails, we will replace the entire unit for as long as you own your home. This furnace also has a 10-Year Limited Parts 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 tabs below.


This gas furnace has an AFUE rating of 97%, which means that up to 97 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.

ENERGY STAR