What is the SEER2 rating of the TGM GRH32IT12ASA?

The TGM GRH32IT12ASA is rated at up to 21.5 SEER2 and 11.0 EER2 for cooling and up to 8.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.

Is the TGM GRH32IT12ASA good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 8,500 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 TGM GRH32IT12ASA cost to run per year?

At its rated efficiency it costs about $265-$855 a year in electricity in large U.S. cities, depending on climate and local rates - for example $347 in Phoenix and $730 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

Is the TGM GRH32IT12ASA the same as the CLASSIC GRH32IC12ASA?

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 TGM GRH32IT12ASA?

ENERGY STAR lists 1 certified combination for this outdoor unit. The highest-rated one uses GWH32IT12SA.

12,000 BTU mini-split heat pump · Zeno

TGM GRH32IT12ASA

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

Ranks #324 of 394 12,000 BTU mini-splits for cooling efficiency, and costs about $343 a year to run in a mixed climate like Atlanta.

SEER2: 21.5 Cooling efficiency over a season
Below average · beats 39%
HSPF2: 8.5 Heating efficiency over a season
Below average · beats 2%
EER2: 11.0 Cooling efficiency on a 95°F day
Below average · beats 9%
Heat at 5°F: 8,500 BTU/h71% of its 47°F output
Below average · beats 27%

A good fit if…

Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 8,500 BTU/h at 5°F.
You want steady temperatures and quiet running - the compressor varies its speed.

Think twice if…

Cooling cost matters most - its SEER2 is below average for mini-splits.
You mainly need heat - its HSPF2 is below average for mini-splits.

Calculate my running cost

Details

Specifications12,000 BTU, R-32

General
Brand	TGM
Also sold as	CLASSIC
Outdoor unit model	GRH32IT12ASA
Series	Zeno
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	July 9, 2025
Last certified	March 17, 2026
Cooling
SEER2Seasonal efficiency, higher is better	21.5 (range 21.5)
EER2Efficiency at 95°F outdoors	11.0
Cooling capacity	12,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	8.5
Capacity at 47°F	12,000 BTU/h
Capacity at 17°F	9,800 BTU/h
Capacity at 5°F	8,500 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 colder71% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with GWH32IT12SA 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.
GWH32IT12SA · cold climate	21.5	11.0	8.5	8,500	216025766

Same unit, other model numbers1

These model numbers have exactly the same certified ratings and matchups as the TGM GRH32IT12ASA: the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

CLASSIC GRH32IC12ASA

Yearly running cost in 10 large cities$265-$855

Phoenix, AZ$347/yr
Miami, FL$265/yr
Houston, TX$312/yr
Atlanta, GA$343/yr
Los Angeles, CA$340/yr
New York, NY$855/yr
Chicago, IL$701/yr
Denver, CO$588/yr
Seattle, WA$366/yr
Minneapolis, MN$730/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 TGM GRH32IT12ASA?: The TGM GRH32IT12ASA is rated at up to 21.5 SEER2 and 11.0 EER2 for cooling and up to 8.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
Is the TGM GRH32IT12ASA good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 8,500 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 TGM GRH32IT12ASA cost to run per year?: At its rated efficiency it costs about $265-$855 a year in electricity in large U.S. cities, depending on climate and local rates - for example $347 in Phoenix and $730 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
Is the TGM GRH32IT12ASA the same as the CLASSIC GRH32IC12ASA?: 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 TGM GRH32IT12ASA?: ENERGY STAR lists 1 certified combination for this outdoor unit. The highest-rated one uses GWH32IT12SA.
What refrigerant does the TGM GRH32IT12ASA 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 $355/yrYou save $264/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 TGM GRH32IT12ASA

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: $355
Current system, per year: $619
You save per year: $264
Payback: 17.0 years
Net after 10 years: -$1,858

Cooling $196Heating $158Electricity used: 2,216 kWhSaved vs. a minimum-efficiency heat pump: $120

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

Elios ESHBA12C2AN · cold climate21.3 SEER2 · 9.2 HSPF2
GREE GWH12ATCXD-D6DNA1B/O · cold climate21.5 SEER2 · 8.5 HSPF2
MDV MOX230-12HFN10-M1E · cold climate21.3 SEER2 · 9.2 HSPF2
GREE GWH12ATCXD-A6DNA1B/O · cold climate21.5 SEER2 · 8.5 HSPF2
Mainline ML12HP230GEN-O · cold climate21.3 SEER2 · 9.1 HSPF2
Hitachi RAS-1.5PNNBDH1 · cold climate21.5 SEER2 · 9.5 HSPF2
Elios ESHBA12C1AN · cold climate21.3 SEER2 · 8.7 HSPF2
Deye DWLA4-12KR2(US) · cold climate21.5 SEER2 · 10.8 HSPF2

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

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of March 17, 2026. How we use the data.