title: "From Gas Furnace to Heat Pump in Massachusetts" summary: "Switching from a 20-year-old gas furnace to a cold-climate heat pump cut our heating bill by 40% — and we got AC for free." storyType: electrification state: MA savingsMonthly: 95 systemSize: "3-ton cold-climate heat pump" date: "2026-01-28" tags:
- heat-pump
- electrification
- massachusetts
- heating
Why We Switched
Our gas furnace was 20 years old and on its last legs. The technician told us it was running at about 70% efficiency — meaning 30 cents of every dollar went up the chimney. Our winter gas bills were $250-350/month.
When the compressor on our separate central AC died in the same year, the decision became obvious: replace both with a single heat pump system.
Choosing a System
We went with a Mitsubishi Hyper-Heating ducted system — a cold-climate heat pump rated down to −13°F. Key specs:
- 36,000 BTU (3-ton) capacity
- Works efficiently down to 5°F, operates to −13°F
- SEER2 rating: 18.9
- HSPF2 rating: 10.6
- Uses our existing ductwork
The Financials
| Item | Amount | |------|--------| | System + installation | $18,000 | | Mass Save rebate | −$10,000 | | Federal 25C tax credit (30%) | −$2,000 (cap) | | Net cost | $6,000 | | Old heating cost (gas) | $280/mo avg (winter) | | New heating cost (electric) | $165/mo avg (winter) | | Old cooling cost | $80/mo avg (summer, window units) | | New cooling cost | $45/mo avg (summer) |
Annual savings: roughly $1,140. Payback on our $6,000 net cost: about 5.3 years.
The Surprise Benefits
- We got AC. Our old house never had central air — just window units. The heat pump does both heating and cooling through the same system.
- It's quieter. The old furnace sounded like a jet engine starting up. The heat pump is whisper-quiet.
- Better humidity control. The variable-speed compressor dehumidifies much better than window ACs.
- No more gas bill line items. We're all-electric now, which simplified our utility payments.
Advice
- Check Mass Save (or your state's equivalent) first. The $10,000 rebate made this a no-brainer.
- Go cold-climate rated. Standard heat pumps lose efficiency below 30°F — cold-climate models handle New England winters.
- Keep your existing ducts if possible. Ductless mini-splits are great, but using existing ducts saved us thousands.
Composite story based on heat pump installations in eastern Massachusetts. Individual costs and savings vary by home size, insulation, and utility rates.