DELLA 048-C-TP-12K1V-23S-OUT

Name: DELLA 048-C-TP-12K1V-23S-OUT
Brand: DELLA

Matched with the 048-C-TP-12K1V-C-IN indoor unit, this system is certified to the ENERGY STAR cold-climate criteria and publishes 10.00 HSPF2 and 23.00 SEER2, with 8,900 BTU/h of heating at 5°F.

Heating capacity of the DELLA 048-C-TP-12K1V-23S-OUT at three outdoor temperatures, in BTU per hour. Paired with 048-C-TP-12K1V-C-IN: 8,900 at 5°F, 10,000 at 17°F, 12,400 at 47°F.

Cold-climate certified by ENERGY STAR. Paired with 048-C-TP-12K1V-C-IN. Points are the only three heating capacities the dataset publishes for this system; the lines between them are drawn to join those points and are not measurements. ENERGY STAR Certified Heat Pumps, retrieved 2026-10-16.

HSPF210.00Btu/Wh, seasonal heating
SEER223.00Btu/Wh, seasonal cooling
COP at 5°F2.10at that test point
Capacity at 5°F8,900BTU/h
Share of 47°F capacity71.8%ours: 5°F ÷ 47°F

What these numbers are and are not. SEER2, EER2, HSPF2 and the COP at 5°F are results from a standard rating procedure, measured at fixed temperatures and airflow in a laboratory. They are not predictions for your house, your climate or your winter. Two systems with the same HSPF2 can use different amounts of electricity in the same building, and the same system will perform differently in Boston and in Atlanta. Use the published capacity at 5°F to judge whether a system still produces heat on a cold night; use HSPF2 only to compare systems with each other.

DELLA 048-C-TP-12K1V-23S-OUT published specifications

Every figure below is the value the dataset publishes for ENERGY STAR ID 4663295. Nothing is calculated except the two rows marked as ours.
Outdoor unit	048-C-TP-12K1V-23S-OUT
Indoor unit	048-C-TP-12K1V-C-IN (TP)
Cold-climate certified	Yes
ENERGY STAR Most Efficient	Yes
SEER2	23.00 Btu/Wh
EER2	13.00 Btu/Wh
HSPF2	10.00 Btu/Wh
Cooling capacity	12,000 BTU/h
Heating capacity at 47°F	12,400 BTU/h
Heating capacity at 17°F	10,000 BTU/h
Heating capacity at 5°F	8,900 BTU/h
COP at 5°F	2.10
Compressor staging	Continuously variable
Refrigerant	R-454B
Date certified	2026-07-06
ENERGY STAR ID / AHRI reference	4663295 / 218640158
5°F capacity as a share of 47°F (ours)	71.8%
Capacity class (ours)	12,000 BTU/h nominal

Source. ENERGY STAR Certified Heat Pumps, U.S. EPA, retrieved 2026-10-16 from the dataset's Socrata API. Record identified by ENERGY STAR ID 4663295, AHRI reference 218640158. Certification partner: ALIGN INC.. Model numbers are reproduced exactly as published, including the asterisks ENERGY STAR carries as the manufacturer's wildcard for trim variants.

What the published capacities say about cold weather

A heat pump moves heat from outdoor air, so the colder that air gets, the less heat there is to move. The dataset publishes capacity at three outdoor temperatures, and the shape between them is the single most useful thing on this page. For the 048-C-TP-12K1V-23S-OUT paired with the 048-C-TP-12K1V-C-IN:

At 47°F it delivers 12,400 BTU/h.
At 17°F it delivers 10,000 BTU/h.
At 5°F it delivers 8,900 BTU/h, which is 71.8% of the 47°F figure.

ENERGY STAR lists this system as meeting its cold-climate criteria, which the program describes as better low-temperature heating performance, suitable for use as a home's sole heating source. That is the program's judgement on the published test data, not a promise about any particular winter or any particular house.

Running cost for a 12,000 BTU/h system like this one

Worked as an illustration, not a quote: a house that burned 600 therms of gas in a year through an 80% AFUE furnace needed about 48.0 million BTU of delivered heat. At $1.50 a therm that gas cost $900. Delivering the same heat with a heat pump rated at 10.00 HSPF2 takes 4,800 kWh, which at $0.18 a kWh costs $864. The two costs are equal at $0.188 a kWh.

Those four prices are not your prices, and HSPF2 is a rating-condition figure rather than a seasonal measurement for your climate. Change every input in the running-cost calculator, which shows each formula as it works.

Comparable systems

Same nominal capacity class (12,000 BTU/h), closest published HSPF2 to this one. Colour marks cold-climate certification.

Daikin RX12BXVJU Standard
HSPF2 10.00 · SEER2 20.00 · 7,400 BTU/h at 5°F
MDV MOX330-12HFN1-MW5W Cold-climate
HSPF2 10.00 · SEER2 23.00 · 11,000 BTU/h at 5°F
Mitsubishi Electric MUZ-GS12NAH*** Cold-climate
HSPF2 10.00 · SEER2 25.60 · 10,100 BTU/h at 5°F
DELLA 048-C-TP-12K2V-24S-OUT Cold-climate
HSPF2 10.00 · SEER2 24.00 · 9,100 BTU/h at 5°F
Daikin RXF12AXVJU Standard
HSPF2 10.20 · SEER2 21.00 · 6,600 BTU/h at 5°F

More: all 92 certified systems, or the explainer on SEER2 vs HSPF2.