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Cold Climate
Proven cold-climate performance down to -13°F
The Mitsubishi Hyper-Heating INVERTER is the gold standard for cold-climate heat pumps. Its advanced flash-injection compressor maintains strong heating output even at sub-zero temperatures, making it the most trusted choice for New England winters.
HSPF2
12.5
SEER2
19
Min Temp
-13°F
Noise
51 dB
Installed
$5,500–$12,000
HSPF2 (Heating Efficiency)
12.5
Exceptional — federal minimum is 7.5 HSPF2
SEER2 (Cooling Efficiency)
19
Excellent — federal minimum is 14.3 SEER2
Min Operating Temperature
-13°F
Extreme cold rated — handles the harshest winters
Noise Level
51 dB
Very quiet — comparable to a refrigerator hum
Compressor Warranty
12 Years
5-year parts warranty — register within 90 days of install
Installed Price Range
$5,500–$12,000
Includes equipment, labor, and permits — varies by size and complexity
Heating capacity, cooling capacity, and COP at standard AHRI test temperatures
| Size | Heating @ 47°F | Heating @ 17°F | Heating @ 5°F | Heating @ -5°F | Cooling @ 95°F | COP @ 47°F | COP @ 17°F | COP @ 5°F | COP @ -5°F | Est. Price |
|---|---|---|---|---|---|---|---|---|---|---|
| 1.5 Ton | 18,000 BTU/h | 14,400 BTU/h | 12,600 BTU/h | 10,800 BTU/h | 18,000 BTU/h | 4 | 2.8 | 2.2 | 1.8 | $5,500 |
| 2 Ton | 24,000 BTU/h | 19,200 BTU/h | 16,800 BTU/h | 14,400 BTU/h | 24,000 BTU/h | 3.9 | 2.7 | 2.1 | 1.7 | $7,667 |
| 2.5 Ton | 30,000 BTU/h | 24,000 BTU/h | 21,000 BTU/h | 18,000 BTU/h | 30,000 BTU/h | 3.8 | 2.6 | 2 | 1.6 | $9,833 |
| 3 Ton | 36,000 BTU/h | 28,800 BTU/h | 25,200 BTU/h | 21,600 BTU/h | 36,000 BTU/h | 3.7 | 2.5 | 1.9 | 1.5 | $12,000 |
Capacity and COP values based on manufacturer-published data at AHRI standard conditions. Installed prices are estimates and may vary.
How this unit handles New England's coldest days
Rated Operating Minimum
-13°F
Rated for the vast majority of NE winter conditions
COP at -5°F
1.8
Produces 180% of input energy as heat even at -5°F
Capacity Retention at -5°F
60%
Percentage of rated 47°F capacity maintained at -5°F
47°F
100%
18,000 BTU/h
17°F
80%
14,400 BTU/h
5°F
70%
12,600 BTU/h
-5°F
60%
10,800 BTU/h
“Our crew considers the Mitsubishi Hyper-Heat one of the easiest cold-climate units to install. The compact outdoor unit fits tight spaces, and the branch-box multi-zone capability reduces linesets. Typical install takes 1–2 days depending on zone count.”
— NuWatt Energy Install Team
A heat pump increases your electricity usage by 3,000–6,000 kWh per year. Offset that cost with solar panels and power your heating with free sunshine. NuWatt designs integrated solar + heat pump systems for maximum savings.
The Mitsubishi Hyper-Heating INVERTER costs between $5,500 and $12,000 fully installed by NuWatt Energy. The final price depends on your home’s size, the tonnage you need, and installation complexity. Note that the federal 25C heat pump tax credit expired at the end of 2025, so there is no federal credit available in 2026. However, state rebates and utility incentives may still apply.
The Mitsubishi Hyper-Heating INVERTER is available in 4 sizes from 1.5 to 3 ton. A general guideline is 1 ton per 500–600 square feet, but proper sizing depends on your home’s insulation, climate zone, and layout. NuWatt performs a Manual J load calculation during your free consultation to determine the exact size.
Yes. The Mitsubishi Hyper-Heating INVERTER is rated to operate down to -13°F, making it a strong choice for New England winters. At 5°F, it maintains a COP of 2.2, meaning it produces 220% more heat energy than the electricity it consumes. Supplemental heat strips may still be needed during the very coldest hours.
The Mitsubishi Hyper-Heating INVERTER comes with a 12-year compressor warranty and a 5-year parts warranty. NuWatt also provides our own workmanship warranty covering installation labor. Be sure to register your product with Mitsubishi within 90 days of installation to activate the full warranty.
The Mitsubishi Hyper-Heating INVERTER has an HSPF2 of 12.5 (heating) and SEER2 of 19 (cooling). For context, the minimum federal standard is 7.5 HSPF2 and 14.3 SEER2, so this unit is 67% more efficient for heating and 33% more efficient for cooling than the baseline. Higher efficiency means lower monthly energy bills.
The outdoor unit operates at 51 dB, which is quieter than a normal conversation (about 60 dB) and comparable to a quiet office. For comparison, the quietest unit in our lineup is 49 dB (Fujitsu Halcyon) and the loudest is 60 dB (Goodman GSZC18).
