Furnace System GuideGoodman and Amana both sell value-oriented gas furnaces across a range of efficiency tiers. This page collects the specs each brand publishes on its own site, brand by brand, then notes where they differ on paper. It does not pick a winner.
How to Read This Comparison
Every spec below is taken from each manufacturer's own furnace pages, and each brand describes its lineup differently, so direct one-to-one matching is imperfect. AFUE figures are the tier numbers each brand publishes.
AFUE measures fuel-to-heat efficiency only. It does not capture install quality, duct losses, dealer network, or price. Treat this as a paper-spec reference, not a verdict.
Where a brand did not publish a number on the page reviewed, this comparison leaves it out rather than estimating it.
Goodman, As Published
Goodman describes its gas furnaces by efficiency tier. Goodman states that a 90 percent or higher AFUE rating on its gas furnaces means that 90-plus cents of every energy dollar warms the home, and that an 80 percent AFUE rating means that 80 cents of every energy dollar warms the home.
On hardware, Goodman distinguishes a multi-speed PSC blower, which uses a permanent split capacitor electric motor, from a multi-speed ECM blower, which uses an electronically commutated motor. Goodman also describes a tubular heat exchanger with wrinkle bend technology built from tubular aluminized-steel.
These are the figures Goodman publishes on its gas furnace page as of this review.
Amana, As Published
Amana also groups its gas furnaces by efficiency tier, listing 90-plus percent AFUE furnaces and 80 percent AFUE furnaces on its product page.
On hardware, Amana lists a stainless steel heat exchanger, a stainless steel tubular primary heat exchanger, and both multi-speed and variable speed motors across its furnace lineup.
These are the figures Amana publishes on its gas furnace page as of this review.
Where They Differ on Paper
Both brands publish the same headline efficiency tiers, 90-plus percent AFUE and 80 percent AFUE, so on advertised tiers they line up closely. The clearest difference on the pages reviewed is the heat exchanger material each brand emphasizes: Goodman describes a tubular aluminized-steel heat exchanger, while Amana describes a stainless steel heat exchanger.
Both brands offer multi-speed and higher-end variable speed or ECM blower options, so the airflow hardware is comparable in kind. Goodman frames its efficiency in cents-per-dollar terms, while Amana leads with its heat exchanger construction.
The published specs do not settle which furnace is better for a given home. Price, the local dealer, install quality, and warranty registration all sit outside these numbers.