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Cold Climate
Quiet, powerful, and built for extreme cold
The LG Red Series is a cold-climate champion with the lowest noise output in our lineup at just 50 dB. LG's LGRED technology maintains full heating capacity at extremely low temperatures, backed by a strong HSPF2 of 11.8 and near-premium SEER2 of 19.5.
HSPF2
11.8
SEER2
19.5
Min Temp
-13°F
Noise
50 dB
Installed
$5,500–$12,500
HSPF2 (Heating Efficiency)
11.8
Excellent — federal minimum is 7.5 HSPF2
SEER2 (Cooling Efficiency)
19.5
Excellent — federal minimum is 14.3 SEER2
Min Operating Temperature
-13°F
Extreme cold rated — handles the harshest winters
Noise Level
50 dB
Ultra-quiet — barely noticeable outdoors
Compressor Warranty
10 Years
5-year parts warranty — register within 90 days of install
Installed Price Range
$5,500–$12,500
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2 Ton | 24,000 BTU/h | 18,600 BTU/h | 15,600 BTU/h | 13,200 BTU/h | 24,000 BTU/h | 3.9 | 2.7 | 2.1 | 1.7 | $5,500 |
| 3 Ton | 36,000 BTU/h | 27,900 BTU/h | 23,400 BTU/h | 19,800 BTU/h | 36,000 BTU/h | 3.8 | 2.6 | 2 | 1.6 | $9,000 |
| 4 Ton | 48,000 BTU/h | 37,200 BTU/h | 31,200 BTU/h | 26,400 BTU/h | 48,000 BTU/h | 3.7 | 2.5 | 1.9 | 1.5 | $12,500 |
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
1.7
Produces 170% of input energy as heat even at -5°F
Capacity Retention at -5°F
55%
Percentage of rated 47°F capacity maintained at -5°F
47°F
100%
24,000 BTU/h
17°F
78%
18,600 BTU/h
5°F
65%
15,600 BTU/h
-5°F
55%
13,200 BTU/h
“LG's quick-connect fittings and lightweight outdoor unit make installation efficient. The system uses R-410A refrigerant and standard linesets. For multi-zone setups, the branch box mounts compactly in a utility area. Typical install: 1 day.”
— 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 LG Red Series costs between $5,500 and $12,500 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 LG Red Series is available in 3 sizes from 2 to 4 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 LG Red Series 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 2.1, meaning it produces 210% more heat energy than the electricity it consumes. Supplemental heat strips may still be needed during the very coldest hours.
The LG Red Series comes with a 10-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 LG within 90 days of installation to activate the full warranty.
The LG Red Series has an HSPF2 of 11.8 (heating) and SEER2 of 19.5 (cooling). For context, the minimum federal standard is 7.5 HSPF2 and 14.3 SEER2, so this unit is 57% more efficient for heating and 36% more efficient for cooling than the baseline. Higher efficiency means lower monthly energy bills.
The outdoor unit operates at 50 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).
