What is the SEER2 rating of the TOSOT TUD36-24W2/NHE-D(U)?

The TOSOT TUD36-24W2/NHE-D(U) is rated at up to 18.2 SEER2 and 11.2 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 4 certified matchups SEER2 ranges from 16.0-18.2.

Is the TOSOT TUD36-24W2/NHE-D(U) good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 34,000 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 TUD36-24W2/NHE-D(U) cost to run per year?

At its rated efficiency it costs about $825-$2,159 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,011 in Phoenix and $1,799 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

Is the TOSOT TUD36-24W2/NHE-D(U) the same as the GREE GFU36HP230V1R32AO?

Yes, as far as the certified ratings go. ENERGY STAR lists 4 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 TUD36-24W2/NHE-D(U)?

ENERGY STAR lists 4 certified combinations for this outdoor unit. The highest-rated ones use TUD36AH2/NHG-D(U), TUD24AH2/NHG-D(U), TCAC24F/NHA.

2.5-ton central heat pump · E Series

TOSOT TUD36-24W2/NHE-D(U)

Very good cooling and heating efficiency for a 2.5-ton central heat pump, and certified for cold climates.

Ranks #32 of 199 2.5 ton central heat pumps for cooling efficiency, and costs about $908 a year to run in a mixed climate like Atlanta.

SEER2: 18.2 Cooling efficiency over a season
Very good · beats 73%
HSPF2: 10.0 Heating efficiency over a season
Very good · beats 84%
EER2: 11.2 Cooling efficiency on a 95°F day
Below average · beats 28%
Heat at 5°F: 34,000 BTU/h100% of its 47°F output
Below average · beats 39%

A good fit if…

You want low cooling bills - its SEER2 beats 73% of central heat pumps.
Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 34,000 BTU/h at 5°F.
It will heat most of the year - its HSPF2 beats 84% of central heat pumps.
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

Specifications2.5 ton, R-32

General
Brand	TOSOT
Also sold as	GREE, BOREAL, The Heat Pump
Outdoor unit model	TUD36-24W2/NHE-D(U)
Series	E Series
Type	Central heat pump
Nominal size	2.5 ton
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-32
Connected (smart) capable	No
On the market since	March 17, 2026
Last certified	August 20, 2026
Cooling
SEER2Seasonal efficiency, higher is better	18.2 (range 16.0-18.2)
EER2Efficiency at 95°F outdoors	11.0-12.0
Cooling capacity	23,000-34,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	8.5-10.0
Capacity at 47°F	24,000-35,000 BTU/h
Capacity at 17°F	15,000-32,600 BTU/h
Capacity at 5°F	24,000-34,000 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 TUD36AH2/NHG-D(U) at the standard test temperatures, in BTU/h:

Certified matchups4 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.
TUD36AH2/NHG-D(U) · cold climate	18.2	11.2	10.0	34,000	218330459
TUD24AH2/NHG-D(U) · cold climate	18.0	12.0	10.0	24,000	218330458
TCAC24F/NHA · cold climate	16.0	11.0	8.5	24,000	218330457
TCAC36F/NHA · cold climate	16.0	11.0	8.5	32,000	218330456

Same unit, other model numbers3

These model numbers have exactly the same certified ratings and matchups as the TOSOT TUD36-24W2/NHE-D(U): the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

GREE GFU36HP230V1R32AO
BOREAL ARX36HPJ1R32OA
The Heat Pump THP-GUD36W2/NHE-D(U)

Yearly running cost in 10 large cities$825-$2,159

Phoenix, AZ$1,011/yr
Miami, FL$825/yr
Houston, TX$906/yr
Atlanta, GA$908/yr
Los Angeles, CA$882/yr
New York, NY$2,159/yr
Chicago, IL$1,751/yr
Denver, CO$1,454/yr
Seattle, WA$892/yr
Minneapolis, MN$1,799/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 TUD36-24W2/NHE-D(U)?: The TOSOT TUD36-24W2/NHE-D(U) is rated at up to 18.2 SEER2 and 11.2 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 4 certified matchups SEER2 ranges from 16.0-18.2.
Is the TOSOT TUD36-24W2/NHE-D(U) good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 34,000 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 TUD36-24W2/NHE-D(U) cost to run per year?: At its rated efficiency it costs about $825-$2,159 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,011 in Phoenix and $1,799 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
Is the TOSOT TUD36-24W2/NHE-D(U) the same as the GREE GFU36HP230V1R32AO?: Yes, as far as the certified ratings go. ENERGY STAR lists 4 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 TUD36-24W2/NHE-D(U)?: ENERGY STAR lists 4 certified combinations for this outdoor unit. The highest-rated ones use TUD36AH2/NHG-D(U), TUD24AH2/NHG-D(U), TCAC24F/NHA.
What refrigerant does the TOSOT TUD36-24W2/NHE-D(U) 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 $1,000/yrYou save $683/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 TUD36-24W2/NHE-D(U)

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: $1,000
Current system, per year: $1,683
You save per year: $683
Payback: 17.6 years
Net after 10 years: -$5,170

Cooling $619Heating $381Electricity used: 6,248 kWhSaved vs. a minimum-efficiency heat pump: $296

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 2.5 ton models

GREE GUD36W2/NHE-D(U) · cold climate18.2 SEER2 · 10.0 HSPF2
ACIQ ACIQ-30-HPB · cold climate18.2 SEER2 · 9.7 HSPF2
GREE FXU36HP230V1R32AO · cold climate18.2 SEER2 · 10.0 HSPF2
Innovair SHV30H2R20 · cold climate18.2 SEER2 · 9.7 HSPF2
AireForce UXH24-36MSK3IH · cold climate18.2 SEER2 · 10.0 HSPF2
MDV MOD30U-30HFN1-MR0(X) · cold climate18.2 SEER2 · 9.7 HSPF2
ECOER EODA17H-2436AD · cold climate18.5 SEER2 · 8.8 HSPF2
Multi MFG HHS-30HD-A · cold climate18.2 SEER2 · 9.0 HSPF2

See all 199 2.5 ton central heat pumps, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of August 20, 2026. How we use the data.