What is the SEER2 rating of the TOSOT TWH12AD32AO?

The TOSOT TWH12AD32AO is rated at up to 29.5 SEER2 and 15.2 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 6 certified matchups SEER2 ranges from 20.0-29.5.

Is the TOSOT TWH12AD32AO good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 12,200 BTU/h at 5°F with a COP of 2.00, so it is still 2.0 times as efficient as electric resistance heat at that temperature.

How much does the TOSOT TWH12AD32AO cost to run per year?

At its rated efficiency it costs about $194-$711 a year in electricity in large U.S. cities, depending on climate and local rates - for example $266 in Phoenix and $614 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

Is the TOSOT TWH12AD32AO the same as the TOSOT TW12HAY32A1DOC?

Yes, as far as the certified ratings go. ENERGY STAR lists 6 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 TWH12AD32AO?

ENERGY STAR lists 6 certified combinations for this outdoor unit. The highest-rated ones use TWH12AD32AI, TEH12D32AI, TKH12D32AI.

12,000 BTU mini-split heat pump · Airy

TOSOT TWH12AD32AO

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

Ranks #11 of 394 12,000 BTU mini-splits for cooling efficiency, and costs about $279 a year to run in a mixed climate like Atlanta.

SEER2: 29.5 Cooling efficiency over a season
Excellent · beats 98%
HSPF2: 10.0 Heating efficiency over a season
Average · beats 43%
EER2: 15.2 Cooling efficiency on a 95°F day
Excellent · beats 92%
Heat at 5°F: 12,200 BTU/h100% of its 47°F output
Average · beats 48%

A good fit if…

You want low cooling bills - its SEER2 beats 98% of mini-splits.
Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 12,200 BTU/h at 5°F.
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	TOSOT
Also sold as	GREE, Kinghome, Willis
Outdoor unit model	TWH12AD32AO
Series	Airy
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 1, 2024
Last certified	September 22, 2026
Cooling
SEER2Seasonal efficiency, higher is better	29.5 (range 20.0-29.5)
EER2Efficiency at 95°F outdoors	12.3-15.2
Cooling capacity	12,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	8.5-10.0
Capacity at 47°F	12,000-12,200 BTU/h
Capacity at 17°F	10,300-13,000 BTU/h
Capacity at 5°F	10,000-12,200 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.80-2.00
ENERGY STAR cold climate	Yes

Heating output as it gets colder100% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with TWH12AD32AI at the standard test temperatures, in BTU/h:

Certified matchups6 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.
TWH12AD32AI · cold climate	29.5	15.2	10.0	12,200	217992260
TEH12D32AI · cold climate	23.1	13.0	9.0	10,000	218001449
TKH12D32AI · cold climate	23.0	13.0	8.5	10,000	218001446
TTH12D32AI · cold climate	23.0	13.0	8.5	10,000	218001448
TFH12D32AI · cold climate	21.5	13.0	9.0	10,500	218001445
TLH12D32AI · cold climate	20.0	12.3	8.5	10,000	218001447

Same unit, other model numbers5

These model numbers have exactly the same certified ratings and matchups as the TOSOT TWH12AD32AO: the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

TOSOT TW12HAY32A1DOC
GREE GWH12AVDXE-D6DNA1A/O
GREE GWH12AVDXE-D6DNA1B/O
Kinghome KW12XQ29S1DO
Willis AUHW12KR32-O

Yearly running cost in 10 large cities$194-$711

Phoenix, AZ$266/yr
Miami, FL$194/yr
Houston, TX$239/yr
Atlanta, GA$279/yr
Los Angeles, CA$279/yr
New York, NY$711/yr
Chicago, IL$586/yr
Denver, CO$494/yr
Seattle, WA$309/yr
Minneapolis, MN$614/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 TWH12AD32AO?: The TOSOT TWH12AD32AO is rated at up to 29.5 SEER2 and 15.2 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 6 certified matchups SEER2 ranges from 20.0-29.5.
Is the TOSOT TWH12AD32AO good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 12,200 BTU/h at 5°F with a COP of 2.00, so it is still 2.0 times as efficient as electric resistance heat at that temperature.
How much does the TOSOT TWH12AD32AO cost to run per year?: At its rated efficiency it costs about $194-$711 a year in electricity in large U.S. cities, depending on climate and local rates - for example $266 in Phoenix and $614 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
Is the TOSOT TWH12AD32AO the same as the TOSOT TW12HAY32A1DOC?: Yes, as far as the certified ratings go. ENERGY STAR lists 6 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 TWH12AD32AO?: ENERGY STAR lists 6 certified combinations for this outdoor unit. The highest-rated ones use TWH12AD32AI, TEH12D32AI, TKH12D32AI.
What refrigerant does the TOSOT TWH12AD32AO 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 $278/yrYou save $341/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 TWH12AD32AO

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: $278
Current system, per year: $619
You save per year: $341
Payback: 13.2 years
Net after 10 years: -$1,088

Cooling $143Heating $134Electricity used: 1,735 kWhSaved vs. a minimum-efficiency heat pump: $197

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

Fujitsu AOUG12LZAS1 · cold climate29.4 SEER2 · 12.9 HSPF2
Fujitsu AOUG12LZAH1 · cold climate29.4 SEER2 · 12.7 HSPF2
GREE GS12HP230V1RYO · cold climate29.5 SEER2 · 10.0 HSPF2
Mainline ML12HP230CALH-O · cold climate29.4 SEER2 · 12.7 HSPF2
MDV MOX430-12HFN10-M1H · cold climate29.5 SEER2 · 12.7 HSPF2
Midea MO1SS-H12B-2A · cold climate29.4 SEER2 · 12.7 HSPF2
Carrier 37MPRAQ12AA3 · cold climate29.5 SEER2 · 12.7 HSPF2
Arcoaire D5CPRAH12AAK · cold climate28.0 SEER2 · 12.7 HSPF2

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

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of September 22, 2026. How we use the data.