What is the SEER2 rating of the Carrier 37MUHAQ36AA3+KSAIC0701230?

The Carrier 37MUHAQ36AA3+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 1145 certified matchups SEER2 ranges from 15.2-17.0.

Is the Carrier 37MUHAQ36AA3+KSAIC0701230 good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 31,600 BTU/h at 5°F with a COP of 1.90, so it is still 1.9 times as efficient as electric resistance heat at that temperature.

How much does the Carrier 37MUHAQ36AA3+KSAIC0701230 cost to run per year?

At its rated efficiency it costs about $985-$2,660 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,217 in Phoenix and $2,225 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 37MUHAQ36AA3+KSAIC0701230?

ENERGY STAR lists 1145 certified combinations for this outdoor unit. The highest-rated ones use FT5AN(B,X)C48L, PF5TNXC48L, FG5ANXC48L.

3-ton central heat pump · Crossover Heat Pump

Carrier 37MUHAQ36AA3+KSAIC0701230

Average cooling and heating efficiency for a 3-ton central heat pump, and certified for cold climates.

Ranks #157 of 302 3 ton central heat pumps for cooling efficiency, and costs about $1,110 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: 31,600 BTU/h79% of its 47°F output
Below average · beats 20%

A good fit if…

Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 31,600 BTU/h at 5°F.
You want steady temperatures and quiet running - the compressor varies its speed.
You want a choice of indoor units - 1,145 certified pairings.

Think twice if…

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

Calculate my running cost

Details

Specifications3 ton, R-454B

General
Brand	Carrier
Also sold as	Bryant, PAYNE HEATING AND COOLING, WeatherMaker
Outdoor unit model	37MUHAQ36AA3+KSAIC0701230
Series	Crossover Heat Pump
Type	Central heat pump
Nominal size	3 ton
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-454B
Connected (smart) capable	No
On the market since	June 27, 2024
Last certified	October 7, 2026
Cooling
SEER2Seasonal efficiency, higher is better	17.0 (range 15.2-17.0)
EER2Efficiency at 95°F outdoors	9.4-10.5
Cooling capacity	34,200-38,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	8.1-9.0
Capacity at 47°F	37,400-40,000 BTU/h
Capacity at 17°F	24,400-26,200 BTU/h
Capacity at 5°F	29,800-31,600 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.75-1.90
ENERGY STAR cold climate	Yes

Heating output as it gets colder79% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with FT5AN(B,X)C48L at the standard test temperatures, in BTU/h:

Certified matchups1,145 indoor units

The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 1,145 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.
FT5AN(B,X)C48L · cold climate	-	17.0	10.0	8.5	29,800	218474606
PF5TNXC48L · cold climate	-	17.0	10.0	8.5	29,800	218480443
PF5TNXC48L · cold climate	-	17.0	10.0	8.5	29,800	218480441
FG5ANXC48L · cold climate	-	17.0	10.0	8.5	29,800	218479371
FG5ANXC48L · cold climate	-	17.0	10.0	8.5	29,800	218479369
FT5AN(B,X)C48L · cold climate	-	17.0	10.0	8.5	29,800	218479368
PF5TNXC48L · cold climate	-	17.0	10.0	8.5	29,800	218815967
CAA**4821AM · cold climate	58SUB080M21*20	16.9	10.0	8.5	30,000	218474431
CAA**4821AM · cold climate	PG80MSUA60080C**	16.9	10.0	8.5	30,000	218479833
CAA**4821AM · cold climate	83SB60080M21**	16.9	10.0	8.5	30,000	218479831
CAA**4821AM · cold climate	PG80MSUA60080C**	16.9	10.0	8.5	30,000	218815858
FMA5X36**AL · cold climate	-	16.5	10.0	9.0	31,600	218474651
FMA5X36**AL · cold climate	-	16.5	10.0	9.0	31,600	218480476
FMA5X36**AL · cold climate	-	16.5	10.0	9.0	31,600	218480474
FMA5X36**AL · cold climate	-	16.5	10.0	9.0	31,600	218815975
FT5AN(B,X)C36L · cold climate	-	16.5	10.0	8.5	31,000	218473013
CAA**4321AM · cold climate	59TP7A100V21**22	16.5	10.0	8.5	30,200	218474485
CAA**4321AM · cold climate	59TP6C100V21**22	16.5	10.0	8.5	30,200	218474480
CAA**4321AM · cold climate	59SU5B100M21**22	16.5	10.0	8.5	30,200	218474474
CAA**4321AM · cold climate	59SU5B080M21**20	16.5	10.0	8.5	30,400	218474472
CAA**4321AM · cold climate	58TPB110V21*22	16.5	10.0	8.5	30,200	218474464
CAA**4321AM · cold climate	58TPB090V21*20	16.5	10.0	8.5	30,400	218474463
CAA**4321AM · cold climate	58SUB100M21*20	16.5	10.0	8.5	30,400	218474460
CAA**4321AM · cold climate	58SUB080M21*20	16.5	10.0	8.5	30,200	218474459
CAA**4321AM · cold climate	58SUB060M17*16	16.5	10.0	8.5	30,200	218474458
CAA**4321AM · cold climate	58SUB040M17*12	16.5	10.0	8.5	30,200	218474457
CAA**4321AM · cold climate	58SPB110V21*22	16.5	10.0	8.5	30,200	218474456
CAA**4321AM · cold climate	58SPB090V21*20	16.5	10.0	8.5	30,400	218474455
CAA**4821AM · cold climate	59TP7A080V21**20	16.5	9.8	8.5	30,200	218474447
CAA**4821AM · cold climate	59TP6C080V21**20	16.5	9.8	8.5	30,200	218474444
CAA**4821AM · cold climate	59SU5B100M21**22	16.5	10.0	8.5	30,000	218474441
CAA**4821AM · cold climate	59SU5B100M21**20	16.5	10.0	8.5	30,200	218474440
CAA**4821AM · cold climate	59SP6B080V21**20	16.5	9.8	8.5	30,200	218474437
CAA**4821AM · cold climate	58TPB110V21*22	16.5	10.0	8.5	30,200	218474434
CAA**4821AM · cold climate	58SUB060M17*16	16.5	10.0	8.5	30,000	218474430
CAA**4821AM · cold climate	58SPB110V21*22	16.5	10.0	8.5	30,200	218474429
CAA**3721AM · cold climate	59TP7A100V21**22	16.5	10.0	8.5	30,200	218474558
CAA**3721AM · cold climate	59TP6C100V21**22	16.5	10.0	8.5	30,200	218474553
CAA**3721AM · cold climate	58SUB080M21*20	16.5	10.0	8.5	30,200	218474532
CAA**3721AM · cold climate	58SUB060M17*16	16.5	10.0	8.5	30,200	218474531
CAA**3721AM · cold climate	58SPB110V21*22	16.5	10.0	8.5	30,200	218474529
CAA**4221AM · cold climate	59SU5B100M21**22	16.5	9.8	8.5	30,800	218474511
CAA**4221AM · cold climate	58SUB080M21*20	16.5	9.5	8.5	30,800	218474496
CAA**4221AM · cold climate	58SPB110V21*22	16.5	9.8	8.5	30,800	218474493
FT5AN(B,X)C36L · cold climate	-	16.5	10.0	8.5	31,000	218475378
PF5TNXC36L · cold climate	-	16.5	10.0	8.5	31,000	218475377
CAA**3721AM · cold climate	927TA66100V21***	16.5	10.0	8.5	30,200	218480284
CAA**3721AM · cold climate	926TC66100V21***	16.5	10.0	8.5	30,200	218480266
CAA**3721AM · cold climate	PG80MSUA60080C**	16.5	10.0	8.5	30,200	218480190
CAA**3721AM · cold climate	83SB60080M21**	16.5	10.0	8.5	30,200	218480188
CAA**3721AM · cold climate	PG80MSUA48060B**	16.5	10.0	8.5	30,200	218480186
CAA**3721AM · cold climate	83SB48060M17**	16.5	10.0	8.5	30,200	218480185
CAA**3721AM · cold climate	82SB66110V21**	16.5	10.0	8.5	30,200	218480178
CAA**4221AM · cold climate	935SB66100M21***	16.5	9.8	8.5	30,800	218480120
CAA**4221AM · cold climate	PG80MSUA60080C**	16.5	9.5	8.5	30,800	218480074
CAA**4221AM · cold climate	83SB60080M21**	16.5	9.5	8.5	30,800	218480072
CAA**4221AM · cold climate	82SB66110V21**	16.5	9.8	8.5	30,800	218480062
CAA**4321AM · cold climate	927TA66100V21***	16.5	10.0	8.5	30,200	218480046
CAA**4321AM · cold climate	926TC66100V21***	16.5	10.0	8.5	30,200	218480028
CAA**4321AM · cold climate	935SB66100M21***	16.5	10.0	8.5	30,200	218480000

Yearly running cost in 10 large cities$985-$2,660

Phoenix, AZ$1,217/yr
Miami, FL$985/yr
Houston, TX$1,091/yr
Atlanta, GA$1,110/yr
Los Angeles, CA$1,082/yr
New York, NY$2,660/yr
Chicago, IL$2,161/yr
Denver, CO$1,798/yr
Seattle, WA$1,106/yr
Minneapolis, MN$2,225/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 37MUHAQ36AA3+KSAIC0701230?: The Carrier 37MUHAQ36AA3+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 1145 certified matchups SEER2 ranges from 15.2-17.0.
Is the Carrier 37MUHAQ36AA3+KSAIC0701230 good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 31,600 BTU/h at 5°F with a COP of 1.90, so it is still 1.9 times as efficient as electric resistance heat at that temperature.
How much does the Carrier 37MUHAQ36AA3+KSAIC0701230 cost to run per year?: At its rated efficiency it costs about $985-$2,660 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,217 in Phoenix and $2,225 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 37MUHAQ36AA3+KSAIC0701230?: ENERGY STAR lists 1145 certified combinations for this outdoor unit. The highest-rated ones use FT5AN(B,X)C48L, PF5TNXC48L, FG5ANXC48L.
What refrigerant does the Carrier 37MUHAQ36AA3+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 $1,210/yrYou save $665/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 37MUHAQ36AA3+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: $1,210
Current system, per year: $1,875
You save per year: $665
Payback: 20.3 years
Net after 10 years: -$6,851

Cooling $737Heating $473Electricity used: 7,563 kWhSaved vs. a minimum-efficiency heat pump: $234

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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Airquest D5CUHAH36AAK+KSAIC0701230 · cold climate17.0 SEER2 · 9.0 HSPF2
Trane 4TXD2036A10NU · cold climate17.0 SEER2 · 9.0 HSPF2
1HVAC SC-2436-HP · cold climate17.0 SEER2 · 9.0 HSPF2
Bryant 248TAN036**AA17.0 SEER2 · 8.5 HSPF2
Trane 5HCL5036A1 · cold climate17.0 SEER2 · 9.4 HSPF2
Bryant PH8TAN536**AA17.0 SEER2 · 8.5 HSPF2

See all 302 3 ton central heat pumps, ranked

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