What is the SEER2 rating of the Carrier 37MUHAQ30AA3+KSAIC0701230?

The Carrier 37MUHAQ30AA3+KSAIC0701230 is rated at up to 17.0 SEER2 and 10.0 EER2 for cooling and up to 9.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 1214 certified matchups SEER2 ranges from 15.2-17.0.

Is the Carrier 37MUHAQ30AA3+KSAIC0701230 good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 33,400 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 Carrier 37MUHAQ30AA3+KSAIC0701230 cost to run per year?

At its rated efficiency it costs about $828-$2,487 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,059 in Phoenix and $2,107 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 Carrier 37MUHAQ30AA3+KSAIC0701230?

ENERGY STAR lists 1214 certified combinations for this outdoor unit. The highest-rated ones use CAA**3721AM, CAA**4321AM, FT5AN(B,X)C36L.

2.5-ton central heat pump · Crossover Heat Pump

Carrier 37MUHAQ30AA3+KSAIC0701230

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

Ranks #85 of 199 2.5 ton central heat pumps for cooling efficiency, and costs about $1,014 a year to run in a mixed climate like Atlanta.

SEER2: 17.0 Cooling efficiency over a season
Average · beats 49%
HSPF2: 9.0 Heating efficiency over a season
Average · beats 54%
EER2: 10.0 Cooling efficiency on a 95°F day
Below average · beats 10%
Heat at 5°F: 33,400 BTU/h89% of its 47°F output
Below average · beats 39%

A good fit if…

Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 33,400 BTU/h at 5°F.
You want steady temperatures and quiet running - the compressor varies its speed.
You want a choice of indoor units - 1,214 certified pairings.

Think twice if…

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

Calculate my running cost

Details

Specifications2.5 ton, R-454B

General
Brand	Carrier
Also sold as	Bryant, PAYNE HEATING AND COOLING, WeatherMaker
Outdoor unit model	37MUHAQ30AA3+KSAIC0701230
Series	Crossover Heat Pump
Type	Central heat pump
Nominal size	2.5 ton
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-454B
Connected (smart) capable	No
On the market since	May 6, 2025
Last certified	October 7, 2026
Cooling
SEER2Seasonal efficiency, higher is better	17.0 (range 15.2-17.0)
EER2Efficiency at 95°F outdoors	9.5-10.5
Cooling capacity	28,600-31,200 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	8.1-9.0
Capacity at 47°F	35,800-37,400 BTU/h
Capacity at 17°F	20,800-21,600 BTU/h
Capacity at 5°F	32,000-33,400 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.75-2.00
ENERGY STAR cold climate	Yes

Heating output as it gets colder89% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with CAA**3721AM at the standard test temperatures, in BTU/h:

Certified matchups1,214 indoor units

The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 1,214 are shown. Ask your installer for the AHRI reference number of the exact system you are quoted.

Indoor unit	Furnace	SEER2	EER2	HSPF2	Heat @5°F	AHRI ref.
CAA**3721AM · cold climate	58SUB080M21*20	17.0	10.0	9.0	32,000	218474148
CAA**4321AM · cold climate	58SUB080M21*20	17.0	10.0	9.0	32,000	218474038
CAA**3721AM · cold climate	PG80MSUA60080C**	17.0	10.0	9.0	32,000	218478629
CAA**3721AM · cold climate	83SB60080M21**	17.0	10.0	9.0	32,000	218478627
CAA**4321AM · cold climate	PG80MSUA60080C**	17.0	10.0	9.0	32,000	218478254
CAA**4321AM · cold climate	83SB60080M21**	17.0	10.0	9.0	32,000	218478252
CAA**3721AM · cold climate	PG80MSUA60080C**	17.0	10.0	9.0	32,000	218815658
CAA**4321AM · cold climate	PG80MSUA60080C**	17.0	10.0	9.0	32,000	218815584
FT5AN(B,X)C36L · cold climate	-	17.0	10.0	8.5	32,800	218473012
FT5AN(B,X)C36L · cold climate	-	17.0	10.0	8.5	32,800	218475376
PF5TNXC36L · cold climate	-	17.0	10.0	8.5	32,800	218475375
FG5ANXC36L · cold climate	-	17.0	10.0	8.5	32,800	218477454
FG5ANXC36L · cold climate	-	17.0	10.0	8.5	32,800	218477453
PF5TNXC36L · cold climate	-	17.0	10.0	8.5	32,800	218477406
CAA**3721AM · cold climate	59TP7A100V21**22	16.5	10.0	9.0	32,200	218474184
CAA**3721AM · cold climate	59TP7A100V21**20	16.5	10.0	9.0	32,200	218474183
CAA**3721AM · cold climate	59TP7A080V21**20	16.5	10.0	9.0	32,200	218474182
CAA**3721AM · cold climate	59TP6C100V21**22	16.5	10.0	9.0	32,200	218474179
CAA**3721AM · cold climate	59TP6C100V21**20	16.5	10.0	9.0	32,200	218474178
CAA**3721AM · cold climate	59TP6C080V21**20	16.5	10.0	9.0	32,200	218474177
CAA**3721AM · cold climate	59SU5B100M21**22	16.5	10.0	9.0	32,200	218474173
CAA**3721AM · cold climate	59SU5B100M21**20	16.5	10.0	9.0	32,200	218474172
CAA**3721AM · cold climate	59SP6B100V21**20	16.5	10.0	9.0	32,200	218474168
CAA**3721AM · cold climate	59SP6B080V21**20	16.5	10.0	9.0	32,200	218474167
CAA**3721AM · cold climate	58TPB110V21*22	16.5	10.0	9.0	32,200	218474153
CAA**3721AM · cold climate	58TPB090V17*16	16.5	10.0	9.0	32,200	218474151
CAA**3721AM · cold climate	58TPB070V17*16	16.5	10.0	9.0	32,200	218474150
CAA**3721AM · cold climate	58SUB060M17*16	16.5	10.0	9.0	32,200	218474147
CAA**3721AM · cold climate	58SUB040M17*12	16.5	10.0	9.0	32,200	218474146
CAA**3721AM · cold climate	58SPB110V21*22	16.5	10.0	9.0	32,200	218474145
CAA**3721AM · cold climate	58SPB090V17*16	16.5	10.0	9.0	32,200	218474143
CAA**4321AM · cold climate	59TP7A100V21**22	16.5	10.0	9.0	32,200	218474074
CAA**4321AM · cold climate	59TP7A100V21**20	16.5	10.0	9.0	32,200	218474073
CAA**4321AM · cold climate	59TP7A080V21**20	16.5	10.0	9.0	32,200	218474072
CAA**4321AM · cold climate	59TP6C100V21**22	16.5	10.0	9.0	32,200	218474069
CAA**4321AM · cold climate	59TP6C100V21**20	16.5	10.0	9.0	32,200	218474068
CAA**4321AM · cold climate	59TP6C080V21**20	16.5	10.0	9.0	32,200	218474067
CAA**4321AM · cold climate	59SU5B100M21**22	16.5	10.0	9.0	32,200	218474063
CAA**4321AM · cold climate	59SU5B100M21**20	16.5	10.0	9.0	32,200	218474062
CAA**4321AM · cold climate	59SP6B100V21**20	16.5	10.0	9.0	32,200	218474058
CAA**4321AM · cold climate	59SP6B080V21**20	16.5	10.0	9.0	32,200	218474057
CAA**4321AM · cold climate	58TPB110V21*22	16.5	10.0	9.0	32,200	218474043
CAA**4321AM · cold climate	58TPB090V17*16	16.5	10.0	9.0	32,200	218474041
CAA**4321AM · cold climate	58TPB070V17*16	16.5	10.0	9.0	32,200	218474040
CAA**4321AM · cold climate	58SUB060M17*16	16.5	10.0	9.0	32,200	218474037
CAA**4321AM · cold climate	58SUB040M17*12	16.5	10.0	9.0	32,200	218474036
CAA**4321AM · cold climate	58SPB110V21*22	16.5	10.0	9.0	32,200	218474035
CAA**4321AM · cold climate	58SPB090V17*16	16.5	10.0	9.0	32,200	218474033
FMA5X30**AL · cold climate	-	16.5	10.5	9.0	32,000	218473798
FMA5X36**AL · cold climate	-	16.5	10.5	9.0	32,000	218473797
CAA**3721AM · cold climate	927TA66100V21***	16.5	10.0	9.0	32,200	218478754
CAA**3721AM · cold climate	PG97VTAA60100C**	16.5	10.0	9.0	32,200	218478752
CAA**3721AM · cold climate	927TA60100V21***	16.5	10.0	9.0	32,200	218478750
CAA**3721AM · cold climate	PG97VTAA60080C**	16.5	10.0	9.0	32,200	218478748
CAA**3721AM · cold climate	927TA60080V21***	16.5	10.0	9.0	32,200	218478745
CAA**3721AM · cold climate	926TC66100V21***	16.5	10.0	9.0	32,200	218478737
CAA**3721AM · cold climate	PG96VTAB60100C**	16.5	10.0	9.0	32,200	218478735
CAA**3721AM · cold climate	926TC60100V21***	16.5	10.0	9.0	32,200	218478733
CAA**3721AM · cold climate	GG96VTAB60100C**	16.5	10.0	9.0	32,200	218478731
CAA**3721AM · cold climate	PG96VTAB60080C**	16.5	10.0	9.0	32,200	218478730

Yearly running cost in 10 large cities$828-$2,487

Phoenix, AZ$1,059/yr
Miami, FL$828/yr
Houston, TX$950/yr
Atlanta, GA$1,014/yr
Los Angeles, CA$998/yr
New York, NY$2,487/yr
Chicago, IL$2,032/yr
Denver, CO$1,699/yr
Seattle, WA$1,052/yr
Minneapolis, MN$2,107/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 Carrier 37MUHAQ30AA3+KSAIC0701230?: The Carrier 37MUHAQ30AA3+KSAIC0701230 is rated at up to 17.0 SEER2 and 10.0 EER2 for cooling and up to 9.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 1214 certified matchups SEER2 ranges from 15.2-17.0.
Is the Carrier 37MUHAQ30AA3+KSAIC0701230 good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 33,400 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 Carrier 37MUHAQ30AA3+KSAIC0701230 cost to run per year?: At its rated efficiency it costs about $828-$2,487 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,059 in Phoenix and $2,107 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 Carrier 37MUHAQ30AA3+KSAIC0701230?: ENERGY STAR lists 1214 certified combinations for this outdoor unit. The highest-rated ones use CAA**3721AM, CAA**4321AM, FT5AN(B,X)C36L.
What refrigerant does the Carrier 37MUHAQ30AA3+KSAIC0701230 use?: It uses R-454B.

Running cost and savings

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

Heat pump $1,070/yrYou save $575/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 Carrier 37MUHAQ30AA3+KSAIC0701230

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: $1,070
Current system, per year: $1,645
You save per year: $575
Payback: 19.1 years
Net after 10 years: -$5,255

Cooling $617Heating $453Electricity used: 6,688 kWhSaved vs. a minimum-efficiency heat pump: $207

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.

Similar 2.5 ton models

Airquest D5CUHAH30AAK+KSAIC0701230 · cold climate17.0 SEER2 · 9.0 HSPF2
TCL H30TDHXPC · cold climate17.0 SEER2 · 9.5 HSPF2
Heil D5CUHAH30AAK+TIC2025-0016 · cold climate17.0 SEER2 · 8.5 HSPF2
Panasonic CU-M30BAHU17.1 SEER2 · 8.3 HSPF2
Coleman XH630E2S1117.0 SEER2 · 8.1 HSPF2
Thermal Zone TZID30H520ZCS17.1 SEER2 · 8.4 HSPF2
Guardian RH630E2S1117.0 SEER2 · 8.1 HSPF2
NOVAIR LEA30CEN36-O · cold climate17.2 SEER2 · 10.8 HSPF2

See all 199 2.5 ton central heat pumps, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of October 7, 2026. How we use the data.