Goodman GMNT Furnaces | FurnaceCompare®

Goodman GMNT Furnace Overview

The Goodman GMNT series is a multi-position gas furnace operating with a 92.6 AFUE. The 5 different models within the series can be installed in an upflow, downflow, or horizontal position. This Energy Star approved unit features a four speed blower motor, corrosion-resistant secondary heat exchanger and offers vertical or horizontal venting options. A durable, insulated steel cabinet wraps around the unit for increased protection. The units come fully assembled and can be installed for direct vent (2 pipe) or non-direct vent (1 pipe) installation. Goodman also offers optional L.P. conversion kits and concentric vent kits for the GMNT series.

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Consumer Reviews of Goodman GMNT


  • Very Satisfied
  • Somewhat Satisfied
  • Neutral
  • Somewhat Unsatisfied
  • Very Unsatisfied
  • #8 of 23 Goodman Furnace
  • 35.71% of customers recommended

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Goodman GMNT Furnace Reviews

Showing 11-11 of 11 reviews


1.0 rating
Very Unsatisfied

I had the Performance 93 installed about 3 months ago, What a mistake. A very costly mistake. First, there is the noise level, it wakes me up all night when it turns on. I woke at 0430 this morning from the unbalanced or just poorly made/assembled induction fan noise. When the unit is operating it was causing so much vibration in my office I had to remove pictures from the wall. This was only a temporary setback, you see after the switch that turns the gas on failed the unit shut down and no longer operated. My noise problem was solved, it was 56 in my house, The repairman has been over 5 times (Great service)to fix the problem, you can’t fix a poorly designed product, it is what it is. I now sit in the living room with a $30. space heater and the living space closed off, waiting for yet another fan assembly for my $7500. unit. What a piece of JUNK! I wish there was something to check that was 3 steps below VERY UNSATISFIED!

Northern California

Other GMNT Reviews

While many consumers on HVAC forums express their disappointment with Goodman products, very few pinpoint the GMNT as the source of their problems. Based on reviews on and, Goodman furnaces have a reputation of being prone to repairs and needing frequent service. Additional forms found on and highlights the affordability of Goodman products and the GMNT. Homeowners and HVAC contractors note the unit offers a high level of comfort and increased efficiency for a lower price point. Contributors also added the model is backed by a solid warranty.

Goodman GMNT Model Numbers

The GMNT is available in different models which vary in efficiency and capacity.

Model Number AFUE BTUs per Hour
GMNT040-3 92.6 40,000
GMNT060-3 92.6 60,000
GMNT080-4 92.6 80,000
GMNT100-4 92.6 100,000
GMNT120-5 92.6 120,000

GMNT Warranty

Goodman offers a limited lifetime warranty for the heater exchanger and a 5-year limited

warranty for all parts. In order to receive this warranty, homeowners must register their

product at within 60 days of purchase.

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