AFUE = Annual Fuel Utilization Efficiency — it measures how much of every fuel dollar becomes heat.

• 80 AFUE: 80¢ heats your home, 20¢ wasted
• 96 AFUE: 96¢ heats, 4¢ wasted
• 99 AFUE: 99¢ heats, almost nothing wasted

Carrier and Lennox models range from 80% to 99% AFUE.

Yes. Over a 20-year life, a 99% AFUE furnace can save:

• Gas: about $3,000 to $4,400 compared to an 80% unit
• Electricity (ECM vs PSC blowers): about $3,250
• Combined savings: about $6,300 to $7,700

Plus:

• Better resale value (buyers notice high-efficiency HVAC).
• Lower climate impact (less gas burned, lower emissions).

• PSC blower: ~840 kWh/season (~$175/year)
• ECM blower: ~270 kWh/season (~$56/year)
• Savings: ~$120 per year, or about $3,250 over 20 years.

• Single-stage: One flame level, lowest upfront cost.
• Two-stage: Runs low most of the time, high only in extreme cold.
• Modulating: Adjusts in small increments, the quietest and most efficient.

Replacement makes sense when:

• Your system is 20 years old or older
• The heat exchanger is cracked or fails a safety check
• Repair bills keep adding up
• Energy bills climb despite service
• Heating is uneven, noisy, or short-cycling

• Parts: 5 to 10 years (model dependent, registration required)
• Heat exchanger: 20 years or lifetime (model dependent, registration required)

Yes. Homeowners may qualify for:

• Seasonal manufacturer rebates
• Utility rebates (Consumers Energy, DTE)
• Federal tax credits for qualifying high-efficiency systems

We apply eligible savings at installation, so you don’t miss out.

• Take advantage of seasonal specials
• Use manufacturer rebates
• Apply available utility rebates
• Claim federal tax credits on qualifying models
• Choose financing to spread out costs
• Enroll in a maintenance plan to protect efficiency