What is the SEER2 rating of the Bryant 37MGHAQ55FA3?

The Bryant 37MGHAQ55FA3 is rated at up to 22.3 SEER2 and 12.0 EER2 for cooling and up to 10.7 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 15 certified matchups SEER2 ranges from 20.2-22.3.

Is the Bryant 37MGHAQ55FA3 good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 48,000 BTU/h at 5°F with a COP of 2.10, so it is still 2.1 times as efficient as electric resistance heat at that temperature.

How much does the Bryant 37MGHAQ55FA3 cost to run per year?

At its rated efficiency it costs about $1,100-$3,186 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,390 in Phoenix and $2,688 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

48,000 BTU mini-split heat pump · 37M Series

Bryant 37MGHAQ55FA3

Average cooling and heating efficiency for a 48,000 BTU mini-split heat pump, and certified for cold climates.

Ranks #41 of 146 48,000 BTU mini-splits for cooling efficiency, and costs about $1,309 a year to run in a mixed climate like Atlanta.

SEER2: 22.3 Cooling efficiency over a season
Average · beats 53%
HSPF2: 10.7 Heating efficiency over a season
Average · beats 68%
EER2: 12.0 Cooling efficiency on a 95°F day
Below average · beats 25%
Heat at 5°F: 48,000 BTU/h85% of its 47°F output
Average · beats 67%

A good fit if…

Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 48,000 BTU/h at 5°F.
You want steady temperatures and quiet running - the compressor varies its speed.
You want a choice of indoor units - 15 certified pairings.

Think twice if…

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

Calculate my running cost

Details

Specifications48,000 BTU, R-454B

General
Brand	Bryant
Also sold as	Carrier, Payne, WeatherMaker, Midea
Outdoor unit model	37MGHAQ55FA3
Series	37M Series
Type	Mini-split heat pump
Nominal size	48,000 BTU
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-454B
Connected (smart) capable	No
On the market since	November 15, 2018
Last certified	May 6, 2026
Cooling
SEER2Seasonal efficiency, higher is better	22.3 (range 20.2-22.3)
EER2Efficiency at 95°F outdoors	11.7-12.0
Cooling capacity	51,000-53,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	10.5-10.7
Capacity at 47°F	55,000 BTU/h
Capacity at 17°F	47,000-50,000 BTU/h
Capacity at 5°F	47,000-48,000 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	2.00-2.10
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 best matchup at the standard test temperatures, in BTU/h:

Certified matchups15 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.
- BRYANT · cold climate	22.3	12.0	10.5	47,000	215357124
- CARRIER · cold climate	22.3	12.0	10.5	47,000	215357464
- PAYNE · cold climate	22.3	12.0	10.5	47,000	215357712
- Weathermaker · cold climate	22.3	12.0	10.5	47,000	215357754
- MIDEA · cold climate	22.3	12.0	10.5	47,000	215357796
- BRYANT · cold climate	21.3	11.9	10.6	47,500	215357128
- CARRIER · cold climate	21.3	11.9	10.6	47,500	215357468
- PAYNE · cold climate	21.3	11.9	10.6	47,500	215357714
- Weathermaker · cold climate	21.3	11.9	10.6	47,500	215357756
- MIDEA · cold climate	21.3	11.9	10.6	47,500	215357798
- BRYANT · cold climate	20.2	11.7	10.7	48,000	215357126
- CARRIER · cold climate	20.2	11.7	10.7	48,000	215357466
- PAYNE · cold climate	20.2	11.7	10.7	48,000	215357713
- Weathermaker · cold climate	20.2	11.7	10.7	48,000	215357755
- MIDEA · cold climate	20.2	11.7	10.7	48,000	215357797

Yearly running cost in 10 large cities$1,100-$3,186

Phoenix, AZ$1,390/yr
Miami, FL$1,100/yr
Houston, TX$1,247/yr
Atlanta, GA$1,309/yr
Los Angeles, CA$1,284/yr
New York, NY$3,186/yr
Chicago, IL$2,598/yr
Denver, CO$2,169/yr
Seattle, WA$1,340/yr
Minneapolis, MN$2,688/yr

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

Questions4

What is the SEER2 rating of the Bryant 37MGHAQ55FA3?: The Bryant 37MGHAQ55FA3 is rated at up to 22.3 SEER2 and 12.0 EER2 for cooling and up to 10.7 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 15 certified matchups SEER2 ranges from 20.2-22.3.
Is the Bryant 37MGHAQ55FA3 good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 48,000 BTU/h at 5°F with a COP of 2.10, so it is still 2.1 times as efficient as electric resistance heat at that temperature.
How much does the Bryant 37MGHAQ55FA3 cost to run per year?: At its rated efficiency it costs about $1,100-$3,186 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,390 in Phoenix and $2,688 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
What refrigerant does the Bryant 37MGHAQ55FA3 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 $1,397/yrYou save $1,334/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 37MGHAQ55FA3

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: $1,397
Current system, per year: $2,730
You save per year: $1,334
Payback: 14.6 years
Net after 10 years: -$6,162

Cooling $821Heating $576Electricity used: 8,728 kWhSaved vs. a minimum-efficiency heat pump: $705

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 48,000 BTU models

Arcoaire D5CMHAH55FAK · cold climate22.3 SEER2 · 10.7 HSPF2
MDV M6OE31-53HFN10-M1X · cold climate22.3 SEER2 · 10.7 HSPF2
TOSHIBA CARRIER MCY-MAP0487HS-UL22.6 SEER2 · 10.3 HSPF2
Comfort-Aire A-VHP556A-1 · cold climate22.2 SEER2 · 10.7 HSPF2
Fujitsu AOUK048MSAN7 · cold climate23.0 SEER2 · 9.8 HSPF2
MDV M6OE31-53HFN10-M1X-D · cold climate22.2 SEER2 · 10.7 HSPF2
Mitsubishi Electric PUMY-L48NKMU · cold climate23.0 SEER2 · 10.4 HSPF2
Midea MO6HX-H60B-2A · cold climate22.2 SEER2 · 10.7 HSPF2

See all 146 48,000 BTU mini-splits, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of May 6, 2026. How we use the data.