Buying guidance

80% AFUE Gas Electric Split Systems

80% AFUE Gas Electric Split Systems
Mitsubishi Electric outdoor unit with two wall-mounted indoor units Clearance Center Mitsubishi R-410A Close-Outs Remaining stock of Mitsubishi Electric R-410A ductless systems, priced to clear while quantities last. Shop Mitsubishi Clearance
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Show: 12 24 48
Mitsubishi Electric outdoor unit with two wall-mounted indoor units Clearance Center Mitsubishi R-410A Close-Outs Remaining stock of Mitsubishi Electric R-410A ductless systems, priced to clear while quantities last. Shop Mitsubishi Clearance

80% AFUE AC + Gas Furnace Systems

Standard-efficiency air conditioner + gas furnace systems with a 80% AFUE gas furnace. AFUE is the share of the fuel a furnace turns into heat for your home: an 80% furnace turns 80 cents of every fuel dollar into heat and vents through a metal flue, usually into an existing chimney or B-vent.

These systems are the straightforward choice for warmer climates with short heating seasons, and for replacements where the existing metal venting can be reused without new PVC runs.

What you’ll find here

  • Brands: Goodman
  • Cooling efficiency: 13.4 to 19 SEER2
  • Furnace efficiency: 80% AFUE
  • Furnace configuration: upflow, downflow and horizontal
  • Also available with two-stage equipment
  • Refrigerant: R-32
  • Every system is sold as an AHRI-matched set

How to choose

  • Confirm your furnace configuration (upflow, downflow or horizontal) matches your existing install
  • Choose 80% AFUE for mild winters and simple venting, 90%+ for cold climates and lower gas bills
  • Compare SEER2 for cooling efficiency; higher numbers lower summer bills
  • Size from a Manual J load calculation, not just square footage
  • Check the furnace cabinet width so the coil and plenum line up

When does an 80% furnace make sense?

If your winters are short and mild, the extra cost of a condensing furnace can take many years to pay back. An 80% furnace keeps the install simple, reuses the existing metal flue in most replacements, and still pairs with high-SEER2 cooling. Check local code first: some regions now require 90% or higher in new installs.

Need help matching your home?

Call 1.888.509.3391 with your square footage, your current equipment and how the furnace is installed, and we will help you choose. Most in-stock orders ship in 2 to 3 business days, and shipping is free on orders over $399.