Buying guidance

3 Ton Heat Pump + 40,000 BTU Gas Furnace System

3 Ton Heat Pump + 40,000 BTU Gas Furnace System
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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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

3 Ton Dual Fuel Systems with a 40,000 BTU Furnace

A 3 Ton heat pump, a matched evaporator coil and a 40,000 BTU gas furnace, sold together as one AHRI-matched dual fuel system. In summer the heat pump cools like a central air conditioner. In winter it heats the home until the outdoor temperature drops to the switchover point, then the furnace takes over.

3 Ton systems typically suit homes of about 1,500 to 1,800 square feet. That pairing leans toward cooling: the furnace is modest next to the outdoor unit, which suits homes in mild-winter climates where summer is the bigger load and the furnace only covers short cold snaps.

What you’ll find here

  • Brands: Goodman
  • Cooling efficiency: 14.3 to 16 SEER2
  • Heat pump heating efficiency: 7.5 to 8.5 HSPF2
  • Furnace efficiency: 97% AFUE
  • Furnace configuration: upflow and downflow
  • 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 HSPF2 for heat pump heating efficiency and SEER2 for cooling
  • Size from a Manual J load calculation, not just square footage
  • Check the furnace cabinet width so the coil and plenum line up

Why pair a 3 Ton heat pump with a 40,000 BTU furnace?

Cooling capacity is set by the size of the home and its summer load. Heating capacity is set by winter. Pairing a 3 Ton heat pump with a 40,000 BTU furnace lets you size each side for its own job instead of compromising on one. The smaller furnace is there for the few nights a year the heat pump needs help.

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.