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Cold Climate
Ductless cold-climate specialist with -15°F rated operation
The Fujitsu Halcyon XLTH is built for extreme cold with a -15°F minimum operating temperature — the lowest in our lineup alongside the Carrier Greenspeed. Fujitsu's decades of ductless expertise shine in this quiet, compact, highly efficient unit.
HSPF2
12
SEER2
18
Min Temp
-15°F
Noise
49 dB
Configuration
cold climate
HSPF2 (Heating Efficiency)
12
Exceptional — federal minimum is 7.5 HSPF2
SEER2 (Cooling Efficiency)
18
Excellent — federal minimum is 14.3 SEER2
Min Operating Temperature
-15°F
Operating limit only; verify matched-system capacity at the local design temperature.
Noise Level
49 dB
Catalog sound value; check mode, distance and measurement basis before comparing models.
Compressor Warranty
10 Years
Catalog parts term: 5 years. Registration deadlines and coverage conditions vary; see the exact certificate.
Project Pricing
Calculated for your home
Address, system type, tonnage, zones, and installation scope determine the range
Catalog planning comparison of heating capacity, cooling capacity and COP. Verify each value against the exact manufacturer match before equipment selection.
| 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 |
|---|---|---|---|---|---|---|---|---|---|
| 1.5 Ton | 18,000 BTU/h | 14,400 BTU/h | 12,000 BTU/h | 10,200 BTU/h | 18,000 BTU/h | 3.9 | 2.7 | 2.1 | 1.7 |
| 2 Ton | 24,000 BTU/h | 19,200 BTU/h | 16,000 BTU/h | 13,600 BTU/h | 24,000 BTU/h | 3.8 | 2.6 | 2 | 1.6 |
| 3 Ton | 36,000 BTU/h | 28,800 BTU/h | 24,000 BTU/h | 20,400 BTU/h | 36,000 BTU/h | 3.7 | 2.5 | 1.9 | 1.5 |
Product-family catalog values are not an AHRI certificate or a site design. Final equipment selection requires current matched-system documentation.
Our installer-grounded read on the Fujitsu Halcyon XLTH, computed from how its specs compare against the rest of the equipment NuWatt installs.
The Fujitsu Halcyon XLTH is a cold-climate heat pump engineered for the kind of winters NuWatt installs into across New England, the Mid-Atlantic, and Texas Panhandle communities. Its SEER2 of 18 is roughly in line with the median (19) of the products NuWatt installs. HSPF2 of 12 is well above average — winter electric bills will run noticeably lower than mid-pack picks, which matters most in heating-dominated climates like Vermont, New Hampshire, and Maine. The catalog lists operation down to -15°F. Minimum operating temperature alone does not establish cold-climate certification or eliminate backup heat: match the exact indoor/outdoor equipment's heating capacity at the local design temperature to the home's calculated heat loss.
Selection method: DOE Building America cold-climate sizing guidance. Confirm the exact matched equipment and design heat loss before deciding on backup heat.
NuWatt does not have material reservations about this heat pump on the spec sheet. The bigger decisions are usually about home fit: ductless versus ducted, single-zone versus multi-zone, and whether your electrical panel has the capacity to add the unit without an upgrade.
SEER2
-1.0
vs catalog median
HSPF2
+1.0
vs catalog median
Min temp
-5°F
vs catalog median
Compressor warranty
median
vs catalog median
How this unit handles New England's coldest days
Rated Operating Minimum
-15°F
Operating limit—not proof of whole-home capacity at that temperature
COP at -5°F
1.7
Produces 170% of input energy as heat even at -5°F
Capacity Retention at -5°F
57%
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
67%
12,000 BTU/h
-5°F
57%
10,200 BTU/h
Rebate amounts vary by equipment and income. See what you qualify for.
Check My Eligibility“The Halcyon XLTH is a ductless specialist — ideal for older homes without ductwork. Our crews mount the compact outdoor unit with minimal clearance, and indoor wall-mounted or ceiling cassette heads install cleanly with small 3-inch wall penetrations. Multi-head setups work great for zoned comfort.”
— 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.
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Installed cost depends on the exact tonnage, number of indoor and outdoor units, ductwork, electrical work, access, and local incentives. Use NuWatt's address-based heat-pump calculator for a preliminary project range; a site visit is required before a firm quote.
The catalog shows 1.5 to 3 ton options. Do not choose tonnage from floor area alone: use room-by-room Manual J loads, the local design temperature, duct airflow and the exact matched system's heating and cooling capacity. Ask for the sizing calculation and AHRI match with the proposal.
The catalog lists operation down to -15°F. Confirm low-temperature capacity and efficiency for the exact matched system, then compare its output with the home's design heat loss. COP is heat output divided by electrical input, not a percentage saving on your bill. A minimum operating temperature alone does not establish that the system can heat the whole home without supplemental heat.
Our catalog lists 10-year compressor and 5-year parts terms. Verify the current manufacturer's certificate for the exact model, registration deadline, location, ownership transfer and maintenance conditions. Parts coverage is not automatically installation-labor coverage; request both terms in writing.
Our catalog lists 12 HSPF2 for heating and 18 SEER2 for cooling. These are seasonal ratings, not a guaranteed percentage reduction in your bill. Verify the exact AHRI-rated indoor/outdoor combination and applicable equipment category. Compare low-temperature capacity, the local climate, controls, duct losses and the actual electricity and replacement-fuel rates before estimating operating cost.
Our catalog lists an outdoor sound rating of 49 dB. Compare the exact model's manufacturer sound data using the same operating speed, measurement distance and sound-power or sound-pressure basis. Placement, reflections and nighttime operation affect what you hear; a catalog number alone cannot establish which system will be quietest at your home.
