What Is the Highest Efficiency Furnace You Offer?

How High Does Furnace Efficiency Go?

Gas furnace efficiency is measured by AFUE, the percentage of fuel a furnace turns into usable heat. Standard furnaces sit around 80 percent, while high efficiency condensing models reach the mid to upper 90s. The top units we offer are rated up to 95 percent AFUE, meaning almost all of the fuel becomes heat for your home and very little is lost up the flue.

Why 95 Percent Is the Practical Limit

A few furnaces on the market push above 95 percent, but the cost and benefit balance changes quickly past that point. The reduction in operating costs offered by higher efficiency models is normally not justified by the increase in the initial purchase price. The return on investment becomes very hard to justify, even though those units may add comfort features. For most homes, 95 percent AFUE is the sweet spot where strong efficiency meets a sensible purchase price.

When Higher Efficiency Pays Off

The colder your climate and the longer your heating season, the more a high efficiency furnace returns over its life. In northern regions, a 95 percent furnace keeps energy costs low season after season. In milder areas with short winters, a standard 80 percent furnace often makes more sense because the fuel savings are smaller.

What to Check Before You Order

High efficiency condensing furnaces vent through PVC and need a condensate drain, which differs from the metal flue used by standard models. Confirm your home can support the venting and drainage a 95 percent unit requires. A licensed installer handles the final hookup, while you choose the efficiency tier and size that fit your climate and budget.