What is the SEER2 rating of the TCL H18FMHD3XPC?

The TCL H18FMHD3XPC is rated at up to 27.0 SEER2 and 15.0 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 3 certified matchups SEER2 ranges from 21.5-27.0.

Is the TCL H18FMHD3XPC good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 19,800 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 TCL H18FMHD3XPC cost to run per year?

At its rated efficiency it costs about $335-$1,140 a year in electricity in large U.S. cities, depending on climate and local rates - for example $446 in Phoenix and $978 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

18,000 BTU mini-split heat pump · Apex Multi Match Hyper Heat

TCL H18FMHD3XPC

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

Ranks #10 of 465 18,000 BTU mini-splits for cooling efficiency, and costs about $453 a year to run in a mixed climate like Atlanta.

SEER2: 27.0 Cooling efficiency over a season
Excellent · beats 94%
HSPF2: 10.0 Heating efficiency over a season
Average · beats 43%
EER2: 15.0 Cooling efficiency on a 95°F day
Excellent · beats 91%
Heat at 5°F: 19,800 BTU/h99% of its 47°F output
Average · beats 48%

A good fit if…

You want low cooling bills - its SEER2 beats 94% of mini-splits.
Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 19,800 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

Specifications18,000 BTU, R-454B

General
Brand	TCL
Outdoor unit model	H18FMHD3XPC
Series	Apex Multi Match Hyper Heat
Type	Mini-split heat pump
Nominal size	18,000 BTU
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-454B
Connected (smart) capable	No
On the market since	December 3, 2025
Last certified	August 20, 2026
Cooling
SEER2Seasonal efficiency, higher is better	27.0 (range 21.5-27.0)
EER2Efficiency at 95°F outdoors	13.0-15.0
Cooling capacity	18,000-20,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	9.0-10.0
Capacity at 47°F	18,000-20,000 BTU/h
Capacity at 17°F	21,400-23,000 BTU/h
Capacity at 5°F	18,900-19,800 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 colder99% 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 matchups3 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	27.0	15.0	10.0	19,800	218374501
- · cold climate	24.3	14.0	9.5	19,300	218644506
- · cold climate	21.5	13.0	9.0	18,900	218644501

Yearly running cost in 10 large cities$335-$1,140

Phoenix, AZ$446/yr
Miami, FL$335/yr
Houston, TX$401/yr
Atlanta, GA$453/yr
Los Angeles, CA$451/yr
New York, NY$1,140/yr
Chicago, IL$936/yr
Denver, CO$787/yr
Seattle, WA$491/yr
Minneapolis, MN$978/yr

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

Questions4

What is the SEER2 rating of the TCL H18FMHD3XPC?: The TCL H18FMHD3XPC is rated at up to 27.0 SEER2 and 15.0 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 3 certified matchups SEER2 ranges from 21.5-27.0.
Is the TCL H18FMHD3XPC good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 19,800 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 TCL H18FMHD3XPC cost to run per year?: At its rated efficiency it costs about $335-$1,140 a year in electricity in large U.S. cities, depending on climate and local rates - for example $446 in Phoenix and $978 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
What refrigerant does the TCL H18FMHD3XPC use?: It uses R-454B.

Running cost and savings

Pre-filled with this model. Pick your city and what you heat with today; everything else is optional.

Heat pump $461/yrYou save $519/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 H18FMHD3XPC

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: $461
Current system, per year: $980
You save per year: $519
Payback: 13.5 years
Net after 10 years: -$1,808

Cooling $248Heating $213Electricity used: 2,878 kWhSaved vs. a minimum-efficiency heat pump: $291

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

NOVAIR LEA20MZ-3P-454-O · cold climate27.0 SEER2 · 10.0 HSPF2
NOVAIR LEA20-MZ-LCT- 454-O · cold climate27.0 SEER2 · 10.0 HSPF2
Airquest DLCPRBH18AAK · cold climate26.3 SEER2 · 15.5 HSPF2
DELLA 048-TPH-MODU-1D3 · cold climate27.0 SEER2 · 10.0 HSPF2
Fujitsu AOUH18KUAS1 · cold climate26.3 SEER2 · 11.4 HSPF2
Hitachi PAS-18BUFASDQ1-LAC · cold climate27.0 SEER2 · 11.0 HSPF2
Carrier 38MPRBQ18AA3 · cold climate26.3 SEER2 · 11.0 HSPF2
Goodman MST183G32MHAA · cold climate27.0 SEER2 · 11.0 HSPF2

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

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