What is the SEER2 rating of the TOSOT TW12HP32A2DO?

The TOSOT TW12HP32A2DO is rated at up to 24.5 SEER2 and 13.0 EER2 for cooling and up to 9.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 7 certified matchups SEER2 ranges from 21.0-24.5.

Is the TOSOT TW12HP32A2DO good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 11,000 BTU/h at 5°F with a COP of 1.95, so it is still 2.0 times as efficient as electric resistance heat at that temperature.

How much does the TOSOT TW12HP32A2DO cost to run per year?

At its rated efficiency it costs about $232-$763 a year in electricity in large U.S. cities, depending on climate and local rates - for example $306 in Phoenix and $652 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

Is the TOSOT TW12HP32A2DO the same as the TOSOT TW12HP32A2DOC?

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 TOSOT TW12HP32A2DO?

ENERGY STAR lists 7 certified combinations for this outdoor unit. The highest-rated ones use TW12HCL32A5DI, TW12HP32A2DI, TM12HC32TDI.

12,000 BTU mini-split heat pump · Clivia

TOSOT TW12HP32A2DO

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

Ranks #159 of 394 12,000 BTU mini-splits for cooling efficiency, and costs about $305 a year to run in a mixed climate like Atlanta.

SEER2: 24.5 Cooling efficiency over a season
Very good · beats 79%
HSPF2: 9.5 Heating efficiency over a season
Below average · beats 24%
EER2: 13.0 Cooling efficiency on a 95°F day
Average · beats 62%
Heat at 5°F: 11,000 BTU/h92% of its 47°F output
Below average · beats 34%

A good fit if…

You want low cooling bills - its SEER2 beats 79% of mini-splits.
Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 11,000 BTU/h at 5°F.
You want steady temperatures and quiet running - the compressor varies its speed.

Think twice if…

You mainly need heat - its HSPF2 is below average for mini-splits.

Calculate my running cost

Details

Specifications12,000 BTU, R-32

General
Brand	TOSOT
Outdoor unit model	TW12HP32A2DO
Series	Clivia
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	January 12, 2024
Last certified	July 17, 2026
Cooling
SEER2Seasonal efficiency, higher is better	24.5 (range 21.0-24.5)
EER2Efficiency at 95°F outdoors	12.3-13.0
Cooling capacity	12,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	9.0-9.5
Capacity at 47°F	12,000 BTU/h
Capacity at 17°F	7,500-12,000 BTU/h
Capacity at 5°F	10,000-11,000 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.90-1.95
ENERGY STAR cold climate	Yes

Heating output as it gets colder92% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with TW12HCL32A5DI at the standard test temperatures, in BTU/h:

Certified matchups7 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.
TW12HCL32A5DI · cold climate	24.5	13.0	9.5	11,000	215399271
TW12HP32A2DI · cold climate	24.5	13.0	9.5	11,000	215405712
TM12HC32TDI · cold climate	23.0	13.0	9.5	10,000	217575625
TM12HA32EDI · cold climate	23.0	13.0	9.0	10,000	217575571
TM12HE32KDI · cold climate	23.0	13.0	9.0	10,000	217575604
TM12HD32KDI · cold climate	21.5	12.3	9.5	10,000	217575601
TM12HS32FDI · cold climate	21.0	13.0	9.0	10,500	217575580

Same unit, other model numbers1

These model numbers have exactly the same certified ratings and matchups as the TOSOT TW12HP32A2DO: the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

TOSOT TW12HP32A2DOC

Yearly running cost in 10 large cities$232-$763

Phoenix, AZ$306/yr
Miami, FL$232/yr
Houston, TX$275/yr
Atlanta, GA$305/yr
Los Angeles, CA$303/yr
New York, NY$763/yr
Chicago, IL$626/yr
Denver, CO$525/yr
Seattle, WA$327/yr
Minneapolis, MN$652/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 TOSOT TW12HP32A2DO?: The TOSOT TW12HP32A2DO is rated at up to 24.5 SEER2 and 13.0 EER2 for cooling and up to 9.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 7 certified matchups SEER2 ranges from 21.0-24.5.
Is the TOSOT TW12HP32A2DO good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 11,000 BTU/h at 5°F with a COP of 1.95, so it is still 2.0 times as efficient as electric resistance heat at that temperature.
How much does the TOSOT TW12HP32A2DO cost to run per year?: At its rated efficiency it costs about $232-$763 a year in electricity in large U.S. cities, depending on climate and local rates - for example $306 in Phoenix and $652 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
Is the TOSOT TW12HP32A2DO the same as the TOSOT TW12HP32A2DOC?: 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 TOSOT TW12HP32A2DO?: ENERGY STAR lists 7 certified combinations for this outdoor unit. The highest-rated ones use TW12HCL32A5DI, TW12HP32A2DI, TM12HC32TDI.
What refrigerant does the TOSOT TW12HP32A2DO 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 $314/yrYou save $305/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 TOSOT TW12HP32A2DO

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: $314
Current system, per year: $619
You save per year: $305
Payback: 14.8 years
Net after 10 years: -$1,451

Cooling $172Heating $141Electricity used: 1,962 kWhSaved vs. a minimum-efficiency heat pump: $161

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

Ouellet OCVX-H12A-O · cold climate24.5 SEER2 · 9.5 HSPF2
Kinghome KW12XQ25S1DO · cold climate24.5 SEER2 · 9.5 HSPF2
GREE VIR12HP230V1R32AO · cold climate24.5 SEER2 · 9.5 HSPF2
DuraSTAR DRA1H12S1A · cold climate24.2 SEER2 · 10.7 HSPF2
GREE GWH12AUCXD-D6DNA1B/O · cold climate24.5 SEER2 · 9.5 HSPF2
KARDA 3KARDA12SZO · cold climate24.2 SEER2 · 10.7 HSPF2
GREE GWH12AUCXD-A6DNA1B/O · cold climate24.5 SEER2 · 9.5 HSPF2
Mitsutomo HO-SZ12-AB-Q · cold climate24.2 SEER2 · 10.7 HSPF2

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

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