What is the SEER2 rating of the Bryant 37MUHAQ18AA3+KSAIC0701230?

The Bryant 37MUHAQ18AA3+KSAIC0701230 is rated at up to 16.5 SEER2 and 10.5 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 246 certified matchups SEER2 ranges from 15.2-16.5.

Is the Bryant 37MUHAQ18AA3+KSAIC0701230 good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 17,600 BTU/h at 5°F with a COP of 2.04, so it is still 2.0 times as efficient as electric resistance heat at that temperature.

How much does the Bryant 37MUHAQ18AA3+KSAIC0701230 cost to run per year?

At its rated efficiency it costs about $513-$1,375 a year in electricity in large U.S. cities, depending on climate and local rates - for example $633 in Phoenix and $1,149 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 Bryant 37MUHAQ18AA3+KSAIC0701230?

ENERGY STAR lists 246 certified combinations for this outdoor unit. The highest-rated ones use FMA5X18**AL, FMA5X24**AL, FM(C,U)5Z30**AL.

1.5-ton central heat pump · Crossover Heat Pump

Bryant 37MUHAQ18AA3+KSAIC0701230

Average cooling and heating efficiency for a 1.5-ton central heat pump, and certified for cold climates.

Ranks #85 of 170 1.5 ton central heat pumps for cooling efficiency, and costs about $575 a year to run in a mixed climate like Atlanta.

SEER2: 16.5 Cooling efficiency over a season
Average · beats 40%
HSPF2: 9.0 Heating efficiency over a season
Average · beats 54%
EER2: 10.5 Cooling efficiency on a 95°F day
Below average · beats 17%
Heat at 5°F: 17,600 BTU/h85% of its 47°F output
Average · beats 48%

A good fit if…

Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 17,600 BTU/h at 5°F.
You want steady temperatures and quiet running - the compressor varies its speed.
You want a choice of indoor units - 246 certified pairings.

Think twice if…

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

Calculate my running cost

Details

Specifications1.5 ton, R-454B

General
Brand	Bryant
Also sold as	Carrier, PAYNE HEATING AND COOLING, WeatherMaker
Outdoor unit model	37MUHAQ18AA3+KSAIC0701230
Series	Crossover Heat Pump
Type	Central heat pump
Nominal size	1.5 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	16.5 (range 15.2-16.5)
EER2Efficiency at 95°F outdoors	10.0-11.0
Cooling capacity	17,400-18,700 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	8.1-9.0
Capacity at 47°F	18,900-20,200 BTU/h
Capacity at 17°F	14,400-15,300 BTU/h
Capacity at 5°F	16,300-17,600 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.85-2.04
ENERGY STAR cold climate	Yes

Heating output as it gets colder85% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with FMA5X18**AL at the standard test temperatures, in BTU/h:

Certified matchups246 indoor units

The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 246 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.
FMA5X18**AL · cold climate	-	16.5	10.5	8.5	16,800	218473018
FMA5X24**AL · cold climate	-	16.5	10.5	8.5	16,800	218473017
FMA5X18**AL · cold climate	-	16.5	10.5	8.5	16,800	218475449
FMA5X18**AL · cold climate	-	16.5	10.5	8.5	16,800	218475448
FMA5X24**AL · cold climate	-	16.5	10.5	8.5	16,800	218475447
FMA5X24**AL · cold climate	-	16.5	10.5	8.5	16,800	218475446
FM(C,U)5Z30**AL · cold climate	-	16.0	11.0	9.0	16,800	218473019
FM(C,U)5Z30**AL · cold climate	-	16.0	11.0	9.0	16,800	218475451
FM(C,U)5Z30**AL · cold climate	-	16.0	11.0	9.0	16,800	218475450
FM(C,U)5Z18**AL · cold climate	-	16.0	10.5	9.0	17,100	218814842
FT5ANXB24L · cold climate	-	16.0	11.0	8.5	17,400	218473010
FG5ANXB24L · cold climate	-	16.0	11.0	8.5	17,400	218475461
FG5ANXB24L · cold climate	-	16.0	11.0	8.5	17,400	218475460
PF5TNXB24L · cold climate	-	16.0	11.0	8.5	17,400	218475441
FT5ANXB24L · cold climate	-	16.0	11.0	8.5	17,400	218475372
PF5TNXB24L · cold climate	-	16.0	11.0	8.5	17,400	218475371
FEVB0024**+NAVA53601CK · cold climate	-	16.0	10.5	8.5	16,500	218814845
FJ5AN*A18L · cold climate	-	16.0	10.5	8.5	16,800	218814844
PF5TNXB24L · cold climate	-	16.0	11.0	8.5	17,400	218814829
FM(C,U)5Z18**AL · cold climate	-	15.5	10.5	9.0	17,100	218473021
FM(C,U)5Z24**AL · cold climate	-	15.5	10.5	9.0	17,100	218473020
FM(C,U)5Z18**AL · cold climate	-	15.5	10.5	9.0	17,100	218475455
FM(C,U)5Z18**AL · cold climate	-	15.5	10.5	9.0	17,100	218475454
FM(C,U)5Z24**AL · cold climate	-	15.5	10.5	9.0	17,100	218475453
FM(C,U)5Z24**AL · cold climate	-	15.5	10.5	9.0	17,100	218475452
CAA**1917AM · cold climate	OVLAAB036098	15.5	10.5	8.5	17,400	218473231
CAA**1917AM · cold climate	59SC2E080M17**16	15.5	10.5	8.5	16,600	218473213
CAA**1917AM · cold climate	58S(B,C)B070M17*16	15.5	10.5	8.5	16,400	218473201
CAA**1917AM · cold climate	58S(B,C)B070M14*12	15.5	10.5	8.5	16,500	218473200
CAA**1917AM · cold climate	58S(B,C)B045M14*12	15.5	10.5	8.5	16,400	218473199
CAA**2517AM · cold climate	OVLAAB036098	15.5	10.5	8.5	17,500	218473152
CAA**2517AM · cold climate	59SC2E080M17**16	15.5	10.5	8.5	16,500	218473134
CAA**2517AM · cold climate	58S(B,C)B070M17*16	15.5	10.5	8.5	16,300	218473119
CAA**2517AM · cold climate	58S(B,C)B070M17*12	15.5	10.5	8.5	16,400	218473118
CAA**2517AM · cold climate	58S(B,C)B070M14*12	15.5	10.5	8.5	16,400	218473117
CAA**2517AM · cold climate	58S(B,C)B045M14*12	15.5	10.5	8.5	16,400	218473115
CAA**1917AM · cold climate	OVLAAB036098	15.5	10.5	8.5	17,400	218475840
CAA**1917AM · cold climate	PG92MSAA48080B**	15.5	10.5	8.5	16,600	218475807
CAA**1917AM · cold climate	912SE48080M17***	15.5	10.5	8.5	16,600	218475806
CAA**1917AM · cold climate	PG80MS(A,L)A48070B**	15.5	10.5	8.5	16,400	218475785
CAA**1917AM · cold climate	8(0,1)SB48070M17**	15.5	10.5	8.5	16,400	218475784
CAA**1917AM · cold climate	PG80MS(A,L)A36070A**	15.5	10.5	8.5	16,500	218475783
CAA**1917AM · cold climate	8(0,1)SB36070M14**	15.5	10.5	8.5	16,500	218475782
CAA**1917AM · cold climate	PG80MS(A,L)A36045A**	15.5	10.5	8.5	16,400	218475781
CAA**1917AM · cold climate	8(0,1)SB36045M14**	15.5	10.5	8.5	16,400	218475780
CAA**2517AM · cold climate	OVLAAB036098	15.5	10.5	8.5	17,500	218475697
CAA**2517AM · cold climate	PG92MSAA48080B**	15.5	10.5	8.5	16,500	218475664
CAA**2517AM · cold climate	912SE48080M17***	15.5	10.5	8.5	16,500	218475663
CAA**2517AM · cold climate	PG80MS(A,L)A48070B**	15.5	10.5	8.5	16,300	218475637
CAA**2517AM · cold climate	8(0,1)SB48070M17**	15.5	10.5	8.5	16,300	218475636
CAA**2517AM · cold climate	PG80MS(A,L)A36070B**	15.5	10.5	8.5	16,400	218475635
CAA**2517AM · cold climate	8(0,1)SB36070M17**	15.5	10.5	8.5	16,400	218475634
CAA**2517AM · cold climate	PG80MS(A,L)A36070A**	15.5	10.5	8.5	16,400	218475633
CAA**2517AM · cold climate	8(0,1)SB36070M14**	15.5	10.5	8.5	16,400	218475632
CAA**2517AM · cold climate	PG80MS(A,L)A36045A**	15.5	10.5	8.5	16,400	218475629
CAA**2517AM · cold climate	8(0,1)SB36045M14**	15.5	10.5	8.5	16,400	218475628
CAA**1917AM · cold climate	PG92MSAA48080B**	15.5	10.5	8.5	16,600	218814991
CAA**1917AM · cold climate	PG80MS(A,L)A48070B**	15.5	10.5	8.5	16,400	218814981
CAA**1917AM · cold climate	PG80MS(A,L)A36070A**	15.5	10.5	8.5	16,500	218814980
CAA**1917AM · cold climate	PG80MS(A,L)A36045A**	15.5	10.5	8.5	16,400	218814979

Yearly running cost in 10 large cities$513-$1,375

Phoenix, AZ$633/yr
Miami, FL$513/yr
Houston, TX$567/yr
Atlanta, GA$575/yr
Los Angeles, CA$559/yr
New York, NY$1,375/yr
Chicago, IL$1,116/yr
Denver, CO$928/yr
Seattle, WA$571/yr
Minneapolis, MN$1,149/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 Bryant 37MUHAQ18AA3+KSAIC0701230?: The Bryant 37MUHAQ18AA3+KSAIC0701230 is rated at up to 16.5 SEER2 and 10.5 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 246 certified matchups SEER2 ranges from 15.2-16.5.
Is the Bryant 37MUHAQ18AA3+KSAIC0701230 good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 17,600 BTU/h at 5°F with a COP of 2.04, so it is still 2.0 times as efficient as electric resistance heat at that temperature.
How much does the Bryant 37MUHAQ18AA3+KSAIC0701230 cost to run per year?: At its rated efficiency it costs about $513-$1,375 a year in electricity in large U.S. cities, depending on climate and local rates - for example $633 in Phoenix and $1,149 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 Bryant 37MUHAQ18AA3+KSAIC0701230?: ENERGY STAR lists 246 certified combinations for this outdoor unit. The highest-rated ones use FMA5X18**AL, FMA5X24**AL, FM(C,U)5Z30**AL.
What refrigerant does the Bryant 37MUHAQ18AA3+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 $628/yrYou save $326/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 Bryant 37MUHAQ18AA3+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: $628
Current system, per year: $954
You save per year: $326
Payback: 21.4 years
Net after 10 years: -$3,736

Cooling $384Heating $244Electricity used: 3,924 kWhSaved vs. a minimum-efficiency heat pump: $108

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 1.5 ton models

MRCOOL MVP-18-HP-C-230-2516.6 SEER2 · 10.2 HSPF2
Tempstar D5CUHAH18AAK+KSAIC0701230 · cold climate16.5 SEER2 · 9.0 HSPF2
MRCOOL MHP17018A-**A16.8 SEER2 · 8.1 HSPF2
Innovair SEV18H2R1916.5 SEER2 · 8.6 HSPF2
Century HRG1**8S1R-**A16.8 SEER2 · 8.1 HSPF2
MDV MOX330U-18HFN1-MR016.5 SEER2 · 8.6 HSPF2
Blueridge BHP17L18P-**A16.8 SEER2 · 8.4 HSPF2
Daikin DH6VSA181MA16.5 SEER2 · 8.5 HSPF2

See all 170 1.5 ton central heat pumps, ranked

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