What is the SEER2 rating of the Carrier 27SCA524A**30?

The Carrier 27SCA524A**30 is rated at up to 16.5 SEER2 and 13.0 EER2 for cooling and up to 8.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 206 certified matchups SEER2 ranges from 15.2-16.5.

Is the Carrier 27SCA524A**30 good for cold climates?

It is not cold-climate certified: none of its matchups meet the ENERGY STAR cold-climate criteria (a COP of at least 1.75 at 5°F among other limits). In places with frequent sub-zero nights, pick a cold-climate 2-ton model.

How much does the Carrier 27SCA524A**30 cost to run per year?

At its rated efficiency it costs about $676-$1,705 a year in electricity in large U.S. cities, depending on climate and local rates - for example $819 in Phoenix and $1,413 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

Is the Carrier 27SCA524A**30 the same as the Carrier 27SPA624A**30?

Yes, as far as the certified ratings go. ENERGY STAR lists both model numbers with identical efficiency, capacity and matchups, which means the same outdoor unit sold under a different brand or with a minor variant code (voltage, colour or region). The full list is on this page.

Which indoor units work with the Carrier 27SCA524A**30?

ENERGY STAR lists 206 certified combinations for this outdoor unit. The highest-rated ones use FMA5X30**AL, CAA**3721AM, CVAVA3117XMA.

2-ton central heat pump · COMFORT 15 SEER2 HP

Carrier 27SCA524A**30

Average cooling efficiency and below average heating efficiency for a 2-ton central heat pump, but not rated for cold climates.

Ranks #256 of 331 2 ton central heat pumps for cooling efficiency, and costs about $723 a year to run in a mixed climate like Atlanta.

SEER2: 16.5 Cooling efficiency over a season
Average · beats 40%
HSPF2: 8.5 Heating efficiency over a season
Below average · beats 38%
EER2: 13.0 Cooling efficiency on a 95°F day
Very good · beats 89%
Heat at 5°F: 11,900 BTU/h49% of its 47°F output
Very good · beats 83%

A good fit if…

You want a choice of indoor units - 206 certified pairings.

Think twice if…

You often see nights below 0°F - it is not cold-climate certified.
You mainly need heat - its HSPF2 is below average for central heat pumps.
Comfort and noise matter - a single-stage compressor runs only full-on or off.

Calculate my running cost

Details

Specifications2 ton, R-454B

General
Brand	Carrier
Outdoor unit model	27SCA524A**30
Series	COMFORT 15 SEER2 HP
Type	Central heat pump
Nominal size	2 ton
CompressorVariable-speed units run longer at low power	Single stage
Refrigerant	R-454B
Connected (smart) capable	No
On the market since	January 1, 2024
Last certified	June 16, 2026
Cooling
SEER2Seasonal efficiency, higher is better	16.5 (range 15.2-16.5)
EER2Efficiency at 95°F outdoors	11.7-13.0
Cooling capacity	22,200-24,400 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	7.8-8.5
Capacity at 47°F	21,600-24,000 BTU/h
Capacity at 17°F	14,200-15,200 BTU/h
Capacity at 5°F	10,800-11,900 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.96-2.26
ENERGY STAR cold climate	No

Heating output as it gets colder49% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with FMA5X30**AL at the standard test temperatures, in BTU/h:

Certified matchups206 indoor units

The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 206 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.
FMA5X30**AL	-	16.5	13.0	8.5	11,600	214424067
CAA**3721AM	59TP7A100V21**20	16.0	12.5	8.0	11,500	215800247
CAA**3721AM	59TP7A100V21**22	16.0	13.0	8.0	11,400	215800275
CVAVA3117XMA	58SPB090V17*16	16.0	12.0	7.8	11,300	214205055
CVAVA3117XMA	58TPB090V17*16	16.0	12.0	7.8	11,300	214205201
CVAMA3217XMA	58SUB060M17*16	16.0	12.5	7.8	11,300	214212731
CVAVA3817XMA	58TPB090V17*16	16.0	12.5	7.8	11,400	214214379
CVAVA3817XMA	58TPB070V17*16	16.0	12.0	7.8	11,400	214214351
CVAVA3721XMA	58S(B,C)B090M21*16	16.0	12.0	7.8	11,200	214213388
CAA**3721AM	58CUA080C21*20	16.0	12.5	7.8	11,300	214210905
CVAMA3217XMA	58SPB090V17*16	16.0	12.0	7.8	11,400	214212642
CAA**3721AM	59SU5B100M21**20	16.0	12.0	7.8	11,500	214211963
CVAVA3817XMA	59SC2E060M17**14	16.0	12.0	7.8	11,400	214214478
CAA**3721AM	59TN6B100C21**22	16.0	12.5	7.8	11,200	214212018
CVAMA3217XMA	58TPB090V17*16	16.0	12.0	7.8	11,400	214212887
CAA**3721AM	59TN6C080C21**20	16.0	12.5	7.8	11,400	214212045
CAA**3721AM	59TN6C100C21**22	16.0	12.5	7.8	11,500	214212072
CVAMA3217XMA	59SC2E080M17**16	16.0	12.0	7.8	11,200	214212991
CAA**2517AM	58SUB040M17*12	16.0	12.5	7.8	11,300	214210523
CAA**2517AM	58SUB060M17*16	16.0	12.0	7.8	11,200	214210555
CVAVA3817XMA	58S(B,C)B070M17*12	16.0	12.5	7.8	11,400	214213968
CAA**3721AM	58TNB090C21*20	16.0	12.5	7.8	11,500	214211425
CVAMA3117XMA	58SUB060M17*16	16.0	12.0	7.8	11,200	214212343
CAA**3721AM	58TPB110V21*22	16.0	12.0	7.8	11,500	214211482
CVAVA3817XMA	58S(B,C)B090M17*14	16.0	12.5	7.8	11,200	214214030
CVAVA3817XMA	58S(B,C)B070M17*16	16.0	12.0	7.8	11,400	214213998
CAA**2517AM	58TNB070C14*12	16.0	12.5	7.8	11,400	214210614
CAA**3721AM	59CU5B100C21**22	16.0	12.5	7.8	11,600	214211537
CAA**3721AM	59MN7B100C21**22	16.0	12.5	7.8	11,200	214211564
CAA**3721AM	59MN7C080C21**20	16.0	12.5	7.8	11,500	214211591
CVAVA3817XMA	58SUB060M17*16	16.0	12.5	7.8	11,200	214214226
CVAVA3117XMA	58SUB060M17*16	16.0	12.5	7.8	11,200	214213267
CVAMA3217XMA	58S(B,C)B090M17*14	16.0	12.0	7.8	11,200	214212535
CVAVA3817XMA	58SPB070V17*16	16.0	12.0	7.8	11,300	214214112
CAA**3721AM	59MN7C100C21**22	16.0	12.5	7.8	11,500	214211618
CVAVA3817XMA	58SPB090V17*16	16.0	12.5	7.8	11,400	214214137
CAA**3721AM	58CUA040C17*12	16.0	12.5	7.8	11,200	214210878
FM(C,U)5Z30**AL	-	16.0	12.5	7.8	11,100	215828927
FM(C,U)5Z36**AL	-	16.0	12.5	7.8	11,100	215828959
FM(C,U)5Z24**AL	-	15.5	12.0	8.0	11,300	215828895
FEVA0036**+NAVA53601CK	-	15.5	12.0	8.0	11,300	217051511
FM(C,U)5S36**AL	-	15.5	12.5	8.0	11,200	218452304
FM(C,U)5S30**AL	-	15.5	12.5	8.0	11,200	218452272
FJ5AN*B36L	-	15.5	12.0	7.8	11,400	214179762
FT5ANXB24L	-	15.5	12.0	7.8	11,200	214179841
CAA**2517AM	59SC6A060M17**16	15.5	12.0	7.8	11,400	214198017
CAA**2517AM	58TNB090C17*16	15.5	12.0	7.8	11,400	214197592
CAA**2517AM	59TN6C080C17**14	15.5	12.0	7.8	11,300	214198366
CAA**2517AM	59TN6C060C17**14	15.5	12.0	7.8	11,400	214198339
CAA**2517AM	58TNB045C17*12	15.5	12.0	7.8	11,500	214197538
CAA**2517AM	58TNB070C17*16	15.5	12.0	7.8	11,400	214197565
CAA**2517AM	59MN7C060C17**14	15.5	12.0	7.8	11,500	214197807
CAA**2517AM	59CU5B060C17**16	15.5	12.0	7.8	11,300	214197726
CAA**2517AM	59MN7C080C17**14	15.5	12.0	7.8	11,500	214197834
CAA**3721AM	OVLAAB048112	15.5	12.0	7.8	11,500	214203241
CAA**3717AM	58S(B,C)B070M17*16	15.5	12.0	7.8	11,300	214199785
CVAMA3217XMA	59SP6B080V17**16	15.5	12.0	7.8	11,300	214204697
CVAVA3117XMA	59SU5B060M17**16	15.5	12.0	7.8	11,300	214205594
CAA**3721AM	58TNB110C21*20	15.5	12.5	7.8	11,600	214201948
CAA**3721AM	59SU5B080M21**20	15.5	12.5	7.8	11,600	214202831

Same unit, other model numbers1

These model numbers have exactly the same certified ratings and matchups as the Carrier 27SCA524A**30: the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

Carrier 27SPA624A**30

Yearly running cost in 10 large cities$676-$1,705

Phoenix, AZ$819/yr
Miami, FL$676/yr
Houston, TX$734/yr
Atlanta, GA$723/yr
Los Angeles, CA$700/yr
New York, NY$1,705/yr
Chicago, IL$1,380/yr
Denver, CO$1,143/yr
Seattle, WA$700/yr
Minneapolis, MN$1,413/yr

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

Questions6

What is the SEER2 rating of the Carrier 27SCA524A**30?: The Carrier 27SCA524A**30 is rated at up to 16.5 SEER2 and 13.0 EER2 for cooling and up to 8.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 206 certified matchups SEER2 ranges from 15.2-16.5.
Is the Carrier 27SCA524A**30 good for cold climates?: It is not cold-climate certified: none of its matchups meet the ENERGY STAR cold-climate criteria (a COP of at least 1.75 at 5°F among other limits). In places with frequent sub-zero nights, pick a cold-climate 2-ton model.
How much does the Carrier 27SCA524A**30 cost to run per year?: At its rated efficiency it costs about $676-$1,705 a year in electricity in large U.S. cities, depending on climate and local rates - for example $819 in Phoenix and $1,413 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
Is the Carrier 27SCA524A**30 the same as the Carrier 27SPA624A**30?: Yes, as far as the certified ratings go. ENERGY STAR lists both model numbers with identical efficiency, capacity and matchups, which means the same outdoor unit sold under a different brand or with a minor variant code (voltage, colour or region). The full list is on this page.
Which indoor units work with the Carrier 27SCA524A**30?: ENERGY STAR lists 206 certified combinations for this outdoor unit. The highest-rated ones use FMA5X30**AL, CAA**3721AM, CVAVA3117XMA.
What refrigerant does the Carrier 27SCA524A**30 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 $806/yrYou save $402/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 27SCA524A**30

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: $806
Current system, per year: $1,208
You save per year: $402
Payback: 22.4 years
Net after 10 years: -$4,980

Cooling $508Heating $298Electricity used: 5,035 kWhSaved vs. a minimum-efficiency heat pump: $118

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 ton models

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Bryant 235SAN024**AA16.5 SEER2 · 8.5 HSPF2
Grandaire W5H5S24*K*AAA16.5 SEER2 · 8.5 HSPF2
Airquest R5H5S24*K*AAA16.5 SEER2 · 8.5 HSPF2
Heil B5H6S24*K*AAA16.5 SEER2 · 8.5 HSPF2
Midea MO1AE-H24B-2A · cold climate16.5 SEER2 · 8.8 HSPF2
Heil H5H6S24*K*AAA16.5 SEER2 · 8.5 HSPF2
MDV MOX330-24HFN10-M3 · cold climate16.5 SEER2 · 8.8 HSPF2

See all 331 2 ton central heat pumps, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of June 16, 2026. How we use the data.