Efficiency explained
80% vs. 96% Furnace Efficiency
AFUE describes how much fuel energy becomes usable heat. Both 80% and 96% furnaces can be good choices depending on your home and installation.
80% efficiency
These furnaces often have a lower upfront price and typically use metal venting.
96% efficiency
High-efficiency furnaces recover more heat and usually require condensate drainage and PVC venting.
Choosing well
Climate, fuel cost, venting feasibility, expected ownership period, and comfort goals all matter.