What is the SEER2 rating of the TCL TUM-18HA2/I2I22-21ES?

The TCL TUM-18HA2/I2I22-21ES is rated at up to 22.0 SEER2 and 12.0 EER2 for cooling and up to 9.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.

Is the TCL TUM-18HA2/I2I22-21ES good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 13,800 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 TCL TUM-18HA2/I2I22-21ES cost to run per year?

At its rated efficiency it costs about $368-$1,298 a year in electricity in large U.S. cities, depending on climate and local rates - for example $497 in Phoenix and $1,118 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

Is the TCL TUM-18HA2/I2I22-21ES the same as the COSTWAY FP10794US-WH?

Yes, as far as the certified ratings go. ENERGY STAR lists 3 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.

What refrigerant does the TCL TUM-18HA2/I2I22-21ES use?

It uses R-410A. R-410A is being phased down under the EPA AIM Act, and new systems are moving to R-454B and R-32.

18,000 BTU mini-split heat pump · Elite

TCL TUM-18HA2/I2I22-21ES

Average cooling efficiency and below average heating efficiency for a 18,000 BTU mini-split heat pump, and certified for cold climates.

Ranks #240 of 465 18,000 BTU mini-splits for cooling efficiency, and costs about $512 a year to run in a mixed climate like Atlanta.

SEER2: 22.0 Cooling efficiency over a season
Average · beats 48%
HSPF2: 9.0 Heating efficiency over a season
Below average · beats 10%
EER2: 12.0 Cooling efficiency on a 95°F day
Below average · beats 25%
Heat at 5°F: 13,800 BTU/h70% 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 13,800 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.
You want the newest refrigerant - it uses R-410A, which is being phased down.

Calculate my running cost

Details

Specifications18,000 BTU, R-410A

General
Brand	TCL
Also sold as	COSTWAY, TURBRO
Outdoor unit model	TUM-18HA2/I2I22-21ES
Series	Elite
Type	Mini-split heat pump
Nominal size	18,000 BTU
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-410A
Connected (smart) capable	No
On the market since	December 12, 2021
Last certified	October 17, 2025
Cooling
SEER2Seasonal efficiency, higher is better	22.0 (range 22.0)
EER2Efficiency at 95°F outdoors	12.0
Cooling capacity	17,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	9.0
Capacity at 47°F	19,600 BTU/h
Capacity at 17°F	12,200 BTU/h
Capacity at 5°F	13,800 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 colder70% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its best matchup 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.
- · cold climate	22.0	12.0	9.0	13,800	209424843

Same unit, other model numbers2

These model numbers have exactly the same certified ratings and matchups as the TCL TUM-18HA2/I2I22-21ES: the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

COSTWAY FP10794US-WH
TURBRO GL-M18/O

Yearly running cost in 10 large cities$368-$1,298

Phoenix, AZ$497/yr
Miami, FL$368/yr
Houston, TX$447/yr
Atlanta, GA$512/yr
Los Angeles, CA$512/yr
New York, NY$1,298/yr
Chicago, IL$1,068/yr
Denver, CO$899/yr
Seattle, WA$562/yr
Minneapolis, MN$1,118/yr

At each state's average electricity price and the city's typical heating and cooling hours.

Questions5

What is the SEER2 rating of the TCL TUM-18HA2/I2I22-21ES?: The TCL TUM-18HA2/I2I22-21ES is rated at up to 22.0 SEER2 and 12.0 EER2 for cooling and up to 9.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
Is the TCL TUM-18HA2/I2I22-21ES good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 13,800 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 TCL TUM-18HA2/I2I22-21ES cost to run per year?: At its rated efficiency it costs about $368-$1,298 a year in electricity in large U.S. cities, depending on climate and local rates - for example $497 in Phoenix and $1,118 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
Is the TCL TUM-18HA2/I2I22-21ES the same as the COSTWAY FP10794US-WH?: Yes, as far as the certified ratings go. ENERGY STAR lists 3 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.
What refrigerant does the TCL TUM-18HA2/I2I22-21ES use?: It uses R-410A. R-410A is being phased down under the EPA AIM Act, and new systems are moving to R-454B and 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 $516/yrYou save $403/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 TCL TUM-18HA2/I2I22-21ES

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: $516
Current system, per year: $919
You save per year: $403
Payback: 16.1 years
Net after 10 years: -$2,468

Cooling $272Heating $244Electricity used: 3,224 kWhSaved vs. a minimum-efficiency heat pump: $195

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 18,000 BTU models

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MDV MOX430-18HFN10-M1X · cold climate21.7 SEER2 · 12.4 HSPF2
ACIQ ACIQ-18ZPL-HP230C · cold climate21.7 SEER2 · 12.3 HSPF2
DELLA 048-MS-18K2VR-22S-M-OUT · cold climate22.0 SEER2 · 9.5 HSPF2
AI AIR CONDITIONING AO25-18N2-M1H · cold climate21.7 SEER2 · 12.3 HSPF2
ComfortStar C32-MZ-2 · cold climate22.0 SEER2 · 9.5 HSPF2
CanAir 4C28SCH18H21 · cold climate21.7 SEER2 · 12.3 HSPF2

See all 465 18,000 BTU mini-splits, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of October 17, 2025. How we use the data.