What is the SEER2 rating of the Goodman MSH123G32MCAA?

The Goodman MSH123G32MCAA is rated at up to 25.5 SEER2 and 14.0 EER2 for cooling and up to 11.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.

Is the Goodman MSH123G32MCAA good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 12,100 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 Goodman MSH123G32MCAA cost to run per year?

At its rated efficiency it costs about $222-$646 a year in electricity in large U.S. cities, depending on climate and local rates - for example $281 in Phoenix and $545 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

Is the Goodman MSH123G32MCAA the same as the MDV MOX330-12HFN8-M1X?

Yes, as far as the certified ratings go. ENERGY STAR lists 3 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 Goodman MSH123G32MCAA?

ENERGY STAR lists 1 certified combination for this outdoor unit. The highest-rated one uses GOODMAN MSH123G32AXAA.

12,000 BTU mini-split heat pump · MSH Series

Goodman MSH123G32MCAA

Very good cooling and heating efficiency for a 12,000 BTU mini-split heat pump, and certified for cold climates.

Ranks #45 of 394 12,000 BTU mini-splits for cooling efficiency, and costs about $265 a year to run in a mixed climate like Atlanta.

SEER2: 25.5 Cooling efficiency over a season
Very good · beats 88%
HSPF2: 11.5 Heating efficiency over a season
Very good · beats 84%
EER2: 14.0 Cooling efficiency on a 95°F day
Very good · beats 82%
Heat at 5°F: 12,100 BTU/h101% of its 47°F output
Below average · beats 27%

A good fit if…

You want low cooling bills - its SEER2 beats 88% of mini-splits.
Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 12,100 BTU/h at 5°F.
It will heat most of the year - its HSPF2 beats 84% of mini-splits.
You want steady temperatures and quiet running - the compressor varies its speed.

Think twice if…

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

Calculate my running cost

Details

Specifications12,000 BTU, R-32

General
Brand	Goodman
Also sold as	MDV, Franklin
Outdoor unit model	MSH123G32MCAA
Series	MSH Series
Type	Mini-split heat pump
Nominal size	12,000 BTU
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-32
Connected (smart) capable	No
On the market since	February 9, 2026
Last certified	April 21, 2026
Cooling
SEER2Seasonal efficiency, higher is better	25.5 (range 25.5)
EER2Efficiency at 95°F outdoors	14.0
Cooling capacity	12,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	11.5
Capacity at 47°F	12,000 BTU/h
Capacity at 17°F	10,800 BTU/h
Capacity at 5°F	12,100 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.90
ENERGY STAR cold climate	Yes

Heating output as it gets colder101% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with MSH123G32AXAA at the standard test temperatures, in BTU/h:

Certified matchups1 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.
MSH123G32AXAA GOODMAN · cold climate	25.5	14.0	11.5	12,100	218083245

Same unit, other model numbers2

These model numbers have exactly the same certified ratings and matchups as the Goodman MSH123G32MCAA: the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

MDV MOX330-12HFN8-M1X
Franklin MSH123F32MCAA

Yearly running cost in 10 large cities$222-$646

Phoenix, AZ$281/yr
Miami, FL$222/yr
Houston, TX$252/yr
Atlanta, GA$265/yr
Los Angeles, CA$260/yr
New York, NY$646/yr
Chicago, IL$527/yr
Denver, CO$440/yr
Seattle, WA$272/yr
Minneapolis, MN$545/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 Goodman MSH123G32MCAA?: The Goodman MSH123G32MCAA is rated at up to 25.5 SEER2 and 14.0 EER2 for cooling and up to 11.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
Is the Goodman MSH123G32MCAA good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 12,100 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 Goodman MSH123G32MCAA cost to run per year?: At its rated efficiency it costs about $222-$646 a year in electricity in large U.S. cities, depending on climate and local rates - for example $281 in Phoenix and $545 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
Is the Goodman MSH123G32MCAA the same as the MDV MOX330-12HFN8-M1X?: Yes, as far as the certified ratings go. ENERGY STAR lists 3 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 Goodman MSH123G32MCAA?: ENERGY STAR lists 1 certified combination for this outdoor unit. The highest-rated one uses GOODMAN MSH123G32AXAA.
What refrigerant does the Goodman MSH123G32MCAA use?: It uses R-32.

Running cost and savings

Pre-filled with this model. Pick your city and what you heat with today; everything else is optional.

Heat pump $283/yrYou save $336/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 Goodman MSH123G32MCAA

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: $283
Current system, per year: $619
You save per year: $336
Payback: 13.4 years
Net after 10 years: -$1,138

Cooling $166Heating $117Electricity used: 1,766 kWhSaved vs. a minimum-efficiency heat pump: $192

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 12,000 BTU models

Cooper&Hunter CH-RES12-230VO · cold climate25.5 SEER2 · 11.5 HSPF2
MDV MOX230-12HFN10-M1 · cold climate25.5 SEER2 · 11.5 HSPF2
CanAir 4C25SCH12H21 · cold climate25.5 SEER2 · 11.5 HSPF2
NOVAIR LEA12SZ26-O · cold climate25.5 SEER2 · 11.5 HSPF2
ACIQ ACIQ-12ZS-HP230C · cold climate25.5 SEER2 · 11.5 HSPF2
LG KUSAL121A · cold climate25.5 SEER2 · 11.2 HSPF2
MDV MOX330-12HFN10-M1X · cold climate25.5 SEER2 · 11.6 HSPF2
AC Pro MHPC-H-012BSB · cold climate25.5 SEER2 · 11.0 HSPF2

See all 394 12,000 BTU mini-splits, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of April 21, 2026. How we use the data.