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      18,000 BTU mini-split heat pump · T-Pro

      TCL TSC-18HA2/I3TI21

      Average cooling efficiency and below average heating efficiency for a 18,000 BTU mini-split heat pump, but not rated for cold climates.

      Ranks #239 of 465 18,000 BTU mini-splits for cooling efficiency, and costs about $492 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
      13.0 Cooling efficiency on a 95°F day
      Average · beats 62%
      Heat at 5°F
      11,900 BTU/h66% of its 47°F output
      Below average · beats 9%

      A good fit if…

      • You want steady temperatures and quiet running - the compressor varies its speed.

      Think twice if…

      • You often see nights below 0°F - it is not cold-climate certified.
      • 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
      BrandTCL
      Also sold asComfortStar, KANIONco, Pioneer, DELLA, ApooDr, AIR-CON, ROVSUN, TURBRO, Live cool, ACEKOOL, FUJIECO, Clima Smart
      Outdoor unit modelTSC-18HA2/I3TI21
      SeriesT-Pro
      TypeMini-split heat pump
      Nominal size18,000 BTU
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-410A
      Connected (smart) capableNo
      On the market sinceJanuary 1, 2022
      Last certifiedMay 6, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better22.0 (range 22.0)
      EER2Efficiency at 95°F outdoors13.0
      Cooling capacity18,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better9.0
      Capacity at 47°F18,000 BTU/h
      Capacity at 17°F10,000 BTU/h
      Capacity at 5°F11,900 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.80
      ENERGY STAR cold climateNo
      Heating output as it gets colder66% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with TSC-18HA2/I3TI21-I 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 unitSEER2EER2HSPF2Heat @5°FAHRI ref.
      TSC-18HA2/I3TI21-I22.013.09.011,900207688891
      Same unit, other model numbers13

      These model numbers have exactly the same certified ratings and matchups as the TCL TSC-18HA2/I3TI21: the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

      Yearly running cost in 10 large cities$387-$1,218

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

      Questions6
      What is the SEER2 rating of the TCL TSC-18HA2/I3TI21?
      The TCL TSC-18HA2/I3TI21 is rated at up to 22.0 SEER2 and 13.0 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 TSC-18HA2/I3TI21 good for cold climates?
      It is not cold-climate certified: none of its matchups meet the ENERGY STAR cold-climate criteria (a COP of at least 1.75 at 5°F among other limits). In places with frequent sub-zero nights, pick a cold-climate 18,000 BTU model.
      How much does the TCL TSC-18HA2/I3TI21 cost to run per year?
      At its rated efficiency it costs about $387-$1,218 a year in electricity in large U.S. cities, depending on climate and local rates - for example $503 in Phoenix and $1,037 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
      Is the TCL TSC-18HA2/I3TI21 the same as the ComfortStar CHT18CD-23(O)?
      Yes, as far as the certified ratings go. ENERGY STAR lists 14 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 TCL TSC-18HA2/I3TI21?
      ENERGY STAR lists 1 certified combination for this outdoor unit. The highest-rated one uses TSC-18HA2/I3TI21-I.
      What refrigerant does the TCL TSC-18HA2/I3TI21 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 $512/yrYou save $416/yrSee details ↓
      1. Where you live
      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.

      2. The heat pump TCL TSC-18HA2/I3TI21
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $512
      Current system, per year
      $928
      You save per year
      $416
      Payback
      16.8 years
      Net after 10 years
      -$2,839

      Cooling $288Heating $224Electricity used: 3,200 kWhSaved vs. a minimum-efficiency heat pump: $200

      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.

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      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of May 6, 2026. How we use the data.