What is the SEER2 rating of the AireForce UXH24-36MSK3IH?

The AireForce UXH24-36MSK3IH is rated at up to 18.2 SEER2 and 11.2 EER2 for cooling and up to 10.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 20 certified matchups SEER2 ranges from 16.0-18.2.

Is the AireForce UXH24-36MSK3IH good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 34,000 BTU/h at 5°F with a COP of 2.00, so it is still 2.0 times as efficient as electric resistance heat at that temperature.

How much does the AireForce UXH24-36MSK3IH cost to run per year?

At its rated efficiency it costs about $825-$2,159 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,011 in Phoenix and $1,799 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

Which indoor units work with the AireForce UXH24-36MSK3IH?

ENERGY STAR lists 20 certified combinations for this outdoor unit. The highest-rated ones use UMD36MSK3IH, UMD24MSK3IH, UE36X5AB.

2.5-ton central heat pump · E Series

AireForce UXH24-36MSK3IH

Very good cooling and heating efficiency for a 2.5-ton central heat pump, and certified for cold climates.

Ranks #29 of 199 2.5 ton central heat pumps for cooling efficiency, and costs about $908 a year to run in a mixed climate like Atlanta.

SEER2: 18.2 Cooling efficiency over a season
Very good · beats 73%
HSPF2: 10.0 Heating efficiency over a season
Very good · beats 84%
EER2: 11.2 Cooling efficiency on a 95°F day
Below average · beats 28%
Heat at 5°F: 34,000 BTU/h100% of its 47°F output
Below average · beats 39%

A good fit if…

You want low cooling bills - its SEER2 beats 73% of central heat pumps.
Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 34,000 BTU/h at 5°F.
It will heat most of the year - its HSPF2 beats 84% of central heat pumps.
You want steady temperatures and quiet running - the compressor varies its speed.

Think twice if…

Nothing stands out - its ratings have no weak spot for its class.

Calculate my running cost

Details

Specifications2.5 ton, R-32

General
Brand	AireForce
Also sold as	Airtemp, Gibson, Frigidaire, Intertherm
Outdoor unit model	UXH24-36MSK3IH
Series	E Series
Type	Central heat pump
Nominal size	2.5 ton
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-32
Connected (smart) capable	No
On the market since	March 17, 2025
Last certified	August 19, 2026
Cooling
SEER2Seasonal efficiency, higher is better	18.2 (range 16.0-18.2)
EER2Efficiency at 95°F outdoors	11.0-12.0
Cooling capacity	23,000-34,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	8.5-10.0
Capacity at 47°F	24,000-35,000 BTU/h
Capacity at 17°F	15,000-32,600 BTU/h
Capacity at 5°F	24,000-34,000 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.80-2.00
ENERGY STAR cold climate	Yes

Heating output as it gets colder100% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with UMD36MSK3IH at the standard test temperatures, in BTU/h:

Certified matchups20 indoor units

The same outdoor unit scores differently with each indoor unit. Ask your installer for the AHRI reference number of the exact system you are quoted.

Indoor unit	SEER2	EER2	HSPF2	Heat @5°F	AHRI ref.
UMD36MSK3IH · cold climate	18.2	11.2	10.0	34,000	217138199
UMD36MSK3IH · cold climate	18.2	11.2	10.0	34,000	217138203
UMD36MSK3IH · cold climate	18.2	11.2	10.0	34,000	217138207
UMD36MSK3IH · cold climate	18.2	11.2	10.0	34,000	217138211
UMD36MSK3IH · cold climate	18.2	11.2	10.0	34,000	217138215
UMD24MSK3IH · cold climate	18.0	12.0	10.0	24,000	217138198
UMD24MSK3IH · cold climate	18.0	12.0	10.0	24,000	217138202
UMD24MSK3IH · cold climate	18.0	12.0	10.0	24,000	217138206
UMD24MSK3IH · cold climate	18.0	12.0	10.0	24,000	217138210
UMD24MSK3IH · cold climate	18.0	12.0	10.0	24,000	217138214
UE36X5AB · cold climate	16.0	11.0	8.5	32,000	217752935
UE24X5AB · cold climate	16.0	11.0	8.5	24,000	217752937
UE36X5AB · cold climate	16.0	11.0	8.5	32,000	217752939
UE24X5AB · cold climate	16.0	11.0	8.5	24,000	217752941
UE36X5AB · cold climate	16.0	11.0	8.5	32,000	217752943
UE24X5AB · cold climate	16.0	11.0	8.5	24,000	217752945
UE36X5AB · cold climate	16.0	11.0	8.5	32,000	217752947
UE24X5AB · cold climate	16.0	11.0	8.5	24,000	217752949
UE36X5AB · cold climate	16.0	11.0	8.5	32,000	217752951
UE24X5AB · cold climate	16.0	11.0	8.5	24,000	217752953

Yearly running cost in 10 large cities$825-$2,159

Phoenix, AZ$1,011/yr
Miami, FL$825/yr
Houston, TX$906/yr
Atlanta, GA$908/yr
Los Angeles, CA$882/yr
New York, NY$2,159/yr
Chicago, IL$1,751/yr
Denver, CO$1,454/yr
Seattle, WA$892/yr
Minneapolis, MN$1,799/yr

At each state's average electricity price and the city's typical heating and cooling hours.

Questions5

What is the SEER2 rating of the AireForce UXH24-36MSK3IH?: The AireForce UXH24-36MSK3IH is rated at up to 18.2 SEER2 and 11.2 EER2 for cooling and up to 10.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 20 certified matchups SEER2 ranges from 16.0-18.2.
Is the AireForce UXH24-36MSK3IH good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 34,000 BTU/h at 5°F with a COP of 2.00, so it is still 2.0 times as efficient as electric resistance heat at that temperature.
How much does the AireForce UXH24-36MSK3IH cost to run per year?: At its rated efficiency it costs about $825-$2,159 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,011 in Phoenix and $1,799 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
Which indoor units work with the AireForce UXH24-36MSK3IH?: ENERGY STAR lists 20 certified combinations for this outdoor unit. The highest-rated ones use UMD36MSK3IH, UMD24MSK3IH, UE36X5AB.
What refrigerant does the AireForce UXH24-36MSK3IH use?: It uses R-32.

Running cost and savings

Pre-filled with this model. Pick your city and what you heat with today; everything else is optional.

Heat pump $1,000/yrYou save $683/yrSee details ↓

1. Where you live

StateCityElectricity ¢ per kWh

Adjust heating and cooling hours

Filled in from your city's climate. Change them if you run the system much more or less than usual.

Cooling hours full-load hours per yearHeating hours full-load hours per year

2. The heat pump AireForce UXH24-36MSK3IH

Find a model (fills in the ratings below)

SEER2 cooling efficiencyHSPF2 heating efficiencyCooling capacity BTU/hHeating capacity BTU/h

3. What it replaces

Current heatingFurnace efficiency (AFUE %)Gas price, $/thermCurrent coolingOld AC rating SEER2 (10 ≈ 15+ years old)

4. Price replace the example with your quote

Installed price, $Rebates and incentives, $ utility, state

Heat pump, per year: $1,000
Current system, per year: $1,683
You save per year: $683
Payback: 17.6 years
Net after 10 years: -$5,170

Cooling $619Heating $381Electricity used: 6,248 kWhSaved vs. a minimum-efficiency heat pump: $296

Estimates use the unit's rated SEER2 and HSPF2, full-load hours derived from NOAA 1991-2020 degree days, average residential electricity prices from the U.S. EIA (12 months to July 2026) and fuel prices from EIA (2025 for natural gas, week of 2026-10-05 for propane and heating oil). Very cold days that need backup heat are not modelled. Federal minimum for comparison: 14.3 SEER2 / 7.5 HSPF2.

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Trane 5HCL5036B1 · cold climate18.5 SEER2 · 10.0 HSPF2
GREE GUD36W2/NHE-D(U) · cold climate18.2 SEER2 · 10.0 HSPF2
GREE GUD36W2/NXF-D(U) · cold climate18.5 SEER2 · 10.0 HSPF2
TOSOT TUD36-24W2/NHE-D(U) · cold climate18.2 SEER2 · 10.0 HSPF2
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ACIQ ACIQ-30-HPB · cold climate18.2 SEER2 · 9.7 HSPF2

See all 199 2.5 ton central heat pumps, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of August 19, 2026. How we use the data.