Furnace System GuideYork and American Standard both sell high-efficiency gas furnaces. 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 top-of-line numbers each brand advertises.
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.
York, As Published
York states that its gas furnaces reach AFUE efficiency levels as high as 98 percent. York describes a T92V model as a 97 percent AFUE Two Stage Variable Speed furnace and states that its gas furnaces feature two-stage operation, variable speed technology, and smart controls to achieve a precise temperature.
York frames its lineup around durable construction that it says is built to last and reduces maintenance and energy costs. The models displayed range from 80 percent AFUE to 97 percent AFUE, with efficiency levels reaching up to 98 percent noted in the brand's introduction.
These are the figures York publishes on its gas furnace page as of this review.
American Standard, As Published
American Standard states that its Platinum 95 Gas Furnace, with an AFUE of up to 97.3 percent, a modulating gas valve, and a variable speed blower motor, is its most efficient furnace. American Standard adds that a furnace with an AFUE of 90 or higher qualifies as high efficiency, and lists two-stage and single-stage options below the modulating flagship.
On durability, American Standard states that its units endure eight consecutive two-week sessions under accelerated conditions, adding up to more than 2,600 hours of continuous testing.
These are the figures American Standard publishes on its furnace pages as of this review.
Where They Differ on Paper
On advertised top-tier AFUE, the two brands are close. York states its gas furnaces reach as high as 98 percent, while American Standard cites up to 97.3 percent for its modulating Platinum 95. The top-tier design differs in emphasis: York's flagship spec highlighted here is a two-stage variable-speed unit, while American Standard's flagship is a modulating variable-speed unit.
Both lineups step down through lower tiers to an 80 percent AFUE base, and both pair their better burners with variable-speed blowers. York emphasizes durable construction and lower maintenance, while American Standard emphasizes its 2,600-hour testing regime.
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.