What is the SEER2 rating of the TOSOT TWH36R32DO?

The TOSOT TWH36R32DO is rated at up to 21.0 SEER2 and 12.0 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 TOSOT TWH36R32DO good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 24,600 BTU/h at 5°F with a COP of 1.80, so it is still 1.8 times as efficient as electric resistance heat at that temperature.

How much does the TOSOT TWH36R32DO cost to run per year?

At its rated efficiency it costs about $758-$2,428 a year in electricity in large U.S. cities, depending on climate and local rates - for example $990 in Phoenix and $2,071 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

Is the TOSOT TWH36R32DO the same as the Blueridge BXS2Z36SC0?

Yes, as far as the certified ratings go. ENERGY STAR lists 8 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 TWH36R32DO?

ENERGY STAR lists 1 certified combination for this outdoor unit. The highest-rated one uses TWH36R32DSI.

36,000 BTU mini-split heat pump · Charmo

TOSOT TWH36R32DO

Below average cooling and heating efficiency for a 36,000 BTU mini-split heat pump, and certified for cold climates.

Ranks #132 of 205 36,000 BTU mini-splits for cooling efficiency, and costs about $977 a year to run in a mixed climate like Atlanta.

SEER2: 21.0 Cooling efficiency over a season
Below average · beats 30%
HSPF2: 8.5 Heating efficiency over a season
Below average · beats 2%
EER2: 12.0 Cooling efficiency on a 95°F day
Below average · beats 25%
Heat at 5°F: 24,600 BTU/h72% of its 47°F output
Below average · beats 9%

A good fit if…

Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 24,600 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

Specifications36,000 BTU, R-32

General
Brand	TOSOT
Also sold as	Blueridge, AC Pro, ECO AC, Willis, Ouellet, HOUSE KOBO
Outdoor unit model	TWH36R32DO
Series	Charmo
Type	Mini-split heat pump
Nominal size	36,000 BTU
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-32
Connected (smart) capable	No
On the market since	March 20, 2024
Last certified	January 30, 2026
Cooling
SEER2Seasonal efficiency, higher is better	21.0 (range 21.0)
EER2Efficiency at 95°F outdoors	12.0
Cooling capacity	33,600 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	8.5
Capacity at 47°F	34,000 BTU/h
Capacity at 17°F	27,400 BTU/h
Capacity at 5°F	24,600 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.80
ENERGY STAR cold climate	Yes

Heating output as it gets colder72% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with TWH36R32DSI 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.
TWH36R32DSI · cold climate	21.0	12.0	8.5	24,600	217903159

Same unit, other model numbers7

These model numbers have exactly the same certified ratings and matchups as the TOSOT TWH36R32DO: the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

Blueridge BXS2Z36SC0
AC Pro MHPC-D-036BSC
ECO AC EHS-O36KBB
Willis CHW36KR32-O
Willis PUHW36KR32-O
Ouellet OCHX-H36A-O
HOUSE KOBO KOBOGWH36ATEXH/O

Yearly running cost in 10 large cities$758-$2,428

Phoenix, AZ$990/yr
Miami, FL$758/yr
Houston, TX$890/yr
Atlanta, GA$977/yr
Los Angeles, CA$967/yr
New York, NY$2,428/yr
Chicago, IL$1,989/yr
Denver, CO$1,668/yr
Seattle, WA$1,037/yr
Minneapolis, MN$2,071/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 TWH36R32DO?: The TOSOT TWH36R32DO is rated at up to 21.0 SEER2 and 12.0 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 TOSOT TWH36R32DO good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 24,600 BTU/h at 5°F with a COP of 1.80, so it is still 1.8 times as efficient as electric resistance heat at that temperature.
How much does the TOSOT TWH36R32DO cost to run per year?: At its rated efficiency it costs about $758-$2,428 a year in electricity in large U.S. cities, depending on climate and local rates - for example $990 in Phoenix and $2,071 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
Is the TOSOT TWH36R32DO the same as the Blueridge BXS2Z36SC0?: Yes, as far as the certified ratings go. ENERGY STAR lists 8 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 TWH36R32DO?: ENERGY STAR lists 1 certified combination for this outdoor unit. The highest-rated one uses TWH36R32DSI.
What refrigerant does the TOSOT TWH36R32DO 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 $1,011/yrYou save $728/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 TWH36R32DO

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: $1,011
Current system, per year: $1,739
You save per year: $728
Payback: 17.2 years
Net after 10 years: -$5,222

Cooling $563Heating $448Electricity used: 6,320 kWhSaved vs. a minimum-efficiency heat pump: $324

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 36,000 BTU models

Hitachi PAS-36BLFASDQ1 · cold climate20.5 SEER2 · 11.8 HSPF2
York YPAS36BLFASDQ1 · cold climate20.5 SEER2 · 11.8 HSPF2
DELLA 048-TLP-MODU-1D4 · cold climate20.5 SEER2 · 10.5 HSPF2
GE Appliances 4G36ED2BE · cold climate20.5 SEER2 · 10.0 HSPF2
TGM GRH32IT36AS · cold climate21.0 SEER2 · 8.5 HSPF2
Fujitsu AOU36RLXFZH · cold climate20.5 SEER2 · 9.5 HSPF2
Lennox LISH036202U33221.0 SEER2 · 8.5 HSPF2
KEEN Home KEENUMHP36AA · cold climate20.0 SEER2 · 10.8 HSPF2

See all 205 36,000 BTU mini-splits, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of January 30, 2026. How we use the data.