Ductless Heat Pump Heating Cost 2027: Real Winter Bills

How to Use the Rate Tables

1. Check the state. It’s in the title of the first table. If it’s wrong, tap “change” and the state column switches to the right averages.
2. Use your real electric rate. The tables show state averages. Your bill is more accurate: divide the total by the kWh you used and you have your all-in rate, delivery charges included.
3. Multiply by the season. Our house burns 9,500-11,000 kWh a winter on ductless heads (setup below). Multiply your rate by both numbers and you have a working range for a similar home.
4. Compare with gas. The second table lists every state’s electric and gas rates, cheapest power first. Cheap power and pricey gas favor the heat pump. The reverse favors a gas furnace or boiler.
5. Adjust for your house. Ours is about 2,000 sq ft, poorly insulated in spots, and kept warm. A tighter house or a lower thermostat uses less. For a number built around your own home, the home heating cost calculator puts electric, oil, propane and gas side by side.

How Much Electricity Does a Ductless Heat Pump Use in Winter?

A lot. Heating is the biggest electric load a house can have. Our 2,000 sq ft home near Boston uses about 9,500-11,000 kWh per heating season on cold-climate mini splits.

At $0.19/kWh, about the US average, that’s $1,805 to $2,090 a season, or roughly $300-$350 a month over a six-month winter. If your rate is at or below the national average, that’s in the same range as natural gas. Rooftop solar takes a big slice off. New England rates push it up fast.

Where Our Numbers Come From

Spec sheets come from a lab. We wanted to know what these units really draw, so we put a circuit-level energy monitor on every zone in our Boston-area house and have logged each winter since 2017. Know the setup before you lean on our figures:

• Equipment: three single-zone 9,000 BTU Fujitsu Extra Low Temp Heating (XLTH) heads. One is the discontinued 9RLS3YH, the other two are the current 9LZAH1. They perform the same.
• Thermostat: we like it warm. Holding 75-76°F in the room means setting the remote to 78-80°F, fan on Auto or High.
• House: about 2,000 sq ft, with insulation that’s average at best and poor in spots.

Keep it at 68°F in a tighter, newer home and you should use noticeably less than we do.

All of this is about ductless systems. A standard ducted central heat pump is a different machine, and in our experience it leans hard on backup heat once it drops much below 35°F outside.

Do Mini Splits Keep Up Below Zero?

Cold-climate models do. Here are the rated low-temperature limits for the major lines:

• Fujitsu XLTH: -15°F
• Mitsubishi Hyper-Heat: -13°F
• Daikin’s newer hyper-heat models: -13°F
• LG Red: -13°F
• Cooper & Hunter Hyper: claims -22°F (we haven’t tested one, but we’d expect it to perform close to Fujitsu and Mitsubishi)

A rating isn’t the same as a warm room. Boston winter nights usually bottom out at 5-10°F and sometimes reach -5 or -10°F. Here’s what our rooms did:

1. Above 10-15°F outside: no strain. Rooms reach setpoint easily.
2. Around 0°F: output drops. With the remotes at 80-82°F, rooms held about 73°F.
3. Below -5°F: rooms leveled off at 69-70°F.

And our heads are undersized. Each 9,000 BTU unit tops out around 12,000 BTU of heat and is meant for 350-400 sq ft, but we stretch each one over 600-750 sq ft. The one head in a 240 sq ft room held temperature easily at -10°F. Size the system right (our HVAC load calculator gets you close) and a cold-climate mini split can heat a northern house through January.

Mini Split vs. Gas: Which Is Cheaper to Run?

Compare a high-efficiency heat pump with a high-efficiency gas system and, in most states, the yearly bills come out close. The exceptions are worth knowing.

Gas wins in states like Idaho, Utah and Montana, where natural gas runs about $1.20-$1.30 per therm, roughly half the national average. There, a condensing furnace or a high-efficiency boiler costs less to run than a heat pump. Gas also wins when a 95% AFUE condensing unit goes up against a middling heat pump, or when your power runs much past $0.25-$0.30/kWh while gas sits near the national average.

The heat pump wins in states like Delaware, Arkansas and Kentucky, for anyone replacing an old furnace that vents straight up the chimney, and in nearly every house that burns oil or propane.

Rates move, too. Massachusetts customers have seen their per-kWh price jump more than a third in about six months, and New York utilities keep asking for big increases. Check your current rate before you trust any comparison, this one included.

When a Ductless Heat Pump Saves You Real Money

Each of these adds to your savings. You don’t need all three:

1. Your power is cheap, you have solar, or there’s no gas line on your street.
2. You need heat and AC anyway. A high-end ducted central heat pump with a gas furnace backup (think Lennox) means two pieces of equipment, plus new ductwork if the house has none. A 4-zone ductless system typically runs about $19,620-$31,210 installed, with no ducts to build.
3. Your other choice is oil or propane. Those are the fuels mini splits beat most easily.

Don’t forget the cooling side. One system does both jobs, so you skip the roughly $7,640-$11,460 a separate central AC install would cost. The AC energy cost calculator covers the summer bill.

Ask about rebates before you sign. Many states and utilities pay incentives, sometimes several thousand dollars, for switching off oil or gas, and some pay only if you use a participating contractor.

To price the install itself, our mini split cost calculator estimates equipment and labor. Then get free quotes from local HVAC installers and check them against it.