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AMVM97

  • Up to 98% AFUE Performance
  • ComfortBridge™ Technology
  • Stainless-steel tubular primary heat exchanger
  • Efficient and quiet variable-speed circulator motor
Consumer Brochure Product Specifications
Liberty 90 upflow gas furnace
LIB-LftmUnitRepLmtdWarr LIB-LftmHtExLmtdWarr LIB-10YrPrtsLmtdWarr

*Complete warranty details available from your local dealer/contractor or at www.libertyhvac.com. To receive the Lifetime Heat Exchanger, Lifetime Unit Replacement Limited Warranty (in each case good for as long as you own your home) and 10-Year Parts Limited Warranty, online registration must be completed within 60 days of installation. Additional requirements for annual maintenance are required for the Unit Replacement Limited Warranty. Online registration and some of the additional requirements are 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.

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+

In addition to the Lifetime Heat Exchanger Limited Warranty, Lifetime Unit Replacement Limited Warranty (in each case good 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 see your local Liberty brand dealer.


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.

Product Warranty

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.