97% AFUE ACVM97

  • Up to 97% AFUE performance
  • ComfortBridge™ Technology
  • Downflow multi-position installation
FKN-90-dwnflw-CB-CC
Lifetime Heat Exchanger Limited Warranty* 10 Yr Unit Replacement 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 Unit Replacement Limited Warranty and 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.

Product Features+

  • Heavy-duty aluminized-steel tubular heat exchanger
  • Stainless-steel secondary heat exchanger
  • Integrated communicating ComfortBridge™ Technology
  • Self-calibrating modulating gas valve auto-configured for each installation
  • Quiet variable-speed induced draft blower or cooling demand
  • Self-diagnostic control board with constant memory fault code history output to a dual 7-segment display
  • Durable 110-volt silicon nitride igniter
  • Color-coded low-voltage terminals with provisions for electronic air cleaner and humidifier
  • Efficient and quiet variable-speed airflow system gently ramps up or down according to heating or cooling demand
  • Multiple continuous fan speed options offer quiet air circulation
  • Electronic control board with self-diagnostics and provisions for air cleaner and humidifier
  • Auto-comfort mode for enhanced dehumidification modes available

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 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 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 up to 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