What is the SEER2 rating of the Bryant 37MGRAQ18CA3?

The Bryant 37MGRAQ18CA3 is rated at up to 25.2 SEER2 and 14.0 EER2 for cooling and up to 10.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 15 certified matchups SEER2 ranges from 20.0-25.2.

Is the Bryant 37MGRAQ18CA3 good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 14,600 BTU/h at 5°F with a COP of 2.30, so it is still 2.3 times as efficient as electric resistance heat at that temperature.

How much does the Bryant 37MGRAQ18CA3 cost to run per year?

At its rated efficiency it costs about $339-$1,142 a year in electricity in large U.S. cities, depending on climate and local rates - for example $451 in Phoenix and $979 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

18,000 BTU mini-split heat pump · 37M Series

Bryant 37MGRAQ18CA3

Very good cooling efficiency and average heating efficiency for a 18,000 BTU mini-split heat pump, and certified for cold climates.

Ranks #24 of 465 18,000 BTU mini-splits for cooling efficiency, and costs about $455 a year to run in a mixed climate like Atlanta.

SEER2: 25.2 Cooling efficiency over a season
Very good · beats 85%
HSPF2: 10.0 Heating efficiency over a season
Average · beats 43%
EER2: 14.0 Cooling efficiency on a 95°F day
Very good · beats 82%
Heat at 5°F: 14,600 BTU/h71% of its 47°F output
Very good · beats 86%

A good fit if…

You want low cooling bills - its SEER2 beats 85% of mini-splits.
Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 14,600 BTU/h at 5°F.
You want steady temperatures and quiet running - the compressor varies its speed.
You want a choice of indoor units - 15 certified pairings.

Think twice if…

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

Calculate my running cost

Details

Specifications18,000 BTU, R-454B

General
Brand	Bryant
Also sold as	Carrier, Payne, WeatherMaker, Midea
Outdoor unit model	37MGRAQ18CA3
Series	37M Series
Type	Mini-split heat pump
Nominal size	18,000 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	25.2 (range 20.0-25.2)
EER2Efficiency at 95°F outdoors	12.0-14.0
Cooling capacity	18,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	9.8-10.0
Capacity at 47°F	19,000 BTU/h
Capacity at 17°F	16,000 BTU/h
Capacity at 5°F	13,500-14,600 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	2.30
ENERGY STAR cold climate	Yes

Heating output as it gets colder71% 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	25.2	14.0	9.8	13,500	215357130
- CARRIER · cold climate	25.2	14.0	9.8	13,500	215357470
- PAYNE · cold climate	25.2	14.0	9.8	13,500	215357715
- Weathermaker · cold climate	25.2	14.0	9.8	13,500	215357757
- MIDEA · cold climate	25.2	14.0	9.8	13,500	215357799
- BRYANT · cold climate	22.6	13.0	9.9	14,000	215357135
- CARRIER · cold climate	22.6	13.0	9.9	14,000	215357475
- PAYNE · cold climate	22.6	13.0	9.9	14,000	215357717
- Weathermaker · cold climate	22.6	13.0	9.9	14,000	215357759
- MIDEA · cold climate	22.6	13.0	9.9	14,000	215357801
- BRYANT · cold climate	20.0	12.0	10.0	14,600	215357133
- CARRIER · cold climate	20.0	12.0	10.0	14,600	215357473
- PAYNE · cold climate	20.0	12.0	10.0	14,600	215357716
- Weathermaker · cold climate	20.0	12.0	10.0	14,600	215357758
- MIDEA · cold climate	20.0	12.0	10.0	14,600	215357800

Yearly running cost in 10 large cities$339-$1,142

Phoenix, AZ$451/yr
Miami, FL$339/yr
Houston, TX$405/yr
Atlanta, GA$455/yr
Los Angeles, CA$453/yr
New York, NY$1,142/yr
Chicago, IL$938/yr
Denver, CO$788/yr
Seattle, WA$491/yr
Minneapolis, MN$979/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 37MGRAQ18CA3?: The Bryant 37MGRAQ18CA3 is rated at up to 25.2 SEER2 and 14.0 EER2 for cooling and up to 10.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 15 certified matchups SEER2 ranges from 20.0-25.2.
Is the Bryant 37MGRAQ18CA3 good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 14,600 BTU/h at 5°F with a COP of 2.30, so it is still 2.3 times as efficient as electric resistance heat at that temperature.
How much does the Bryant 37MGRAQ18CA3 cost to run per year?: At its rated efficiency it costs about $339-$1,142 a year in electricity in large U.S. cities, depending on climate and local rates - for example $451 in Phoenix and $979 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 37MGRAQ18CA3 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 $464/yrYou save $480/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 37MGRAQ18CA3

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: $464
Current system, per year: $944
You save per year: $480
Payback: 14.6 years
Net after 10 years: -$2,197

Cooling $251Heating $213Electricity used: 2,901 kWhSaved vs. a minimum-efficiency heat pump: $263

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 18,000 BTU models

Arcoaire D5CMRAH18CAK · cold climate25.2 SEER2 · 10.0 HSPF2
MDV M3OX430-18HFN10-M1 · cold climate25.2 SEER2 · 10.0 HSPF2
Mitsubishi Electric MUZ-FX18NLHZ · cold climate25.5 SEER2 · 11.1 HSPF2
Bosch BMS500-AAM018-1CSXRD · cold climate25.1 SEER2 · 10.0 HSPF2
TOSHIBA CARRIER RAV-BP181AT2P-UL · cold climate25.5 SEER2 · 11.3 HSPF2
MDV M3OX430-18HFN10-M1-D · cold climate25.1 SEER2 · 10.0 HSPF2
Fujitsu AOUH18KZAH1 · cold climate25.5 SEER2 · 12.5 HSPF2
Sharp AE-X18CHU · cold climate25.0 SEER2 · 11.5 HSPF2

See all 465 18,000 BTU mini-splits, ranked

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