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      18,000 BTU mini-split heat pump · GOS18V0RWAHD05

      HAVELLS GOS18V0RWAHD05

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

      Ranks #156 of 465 18,000 BTU mini-splits for cooling efficiency, and costs about $489 a year to run in a mixed climate like Atlanta.

      SEER2
      23.0 Cooling efficiency over a season
      Average · beats 62%
      HSPF2
      9.1 Heating efficiency over a season
      Below average · beats 13%
      EER2
      12.1 Cooling efficiency on a 95°F day
      Below average · beats 31%
      Heat at 5°F
      10,600 BTU/h58% of its 47°F output
      Very good · beats 78%

      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.

      Calculate my running cost

      Details

      Specifications18,000 BTU, R-32
      General
      BrandHAVELLS
      Outdoor unit modelGOS18V0RWAHD05
      SeriesGOS18V0RWAHD05
      TypeMini-split heat pump
      Nominal size18,000 BTU
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-32
      Connected (smart) capableNo
      On the market sinceJanuary 1, 2025
      Last certifiedMay 29, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better23.0 (range 23.0)
      EER2Efficiency at 95°F outdoors12.1
      Cooling capacity18,300 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better9.1
      Capacity at 47°F18,300 BTU/h
      Capacity at 17°F11,500 BTU/h
      Capacity at 5°F10,600 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater2.20
      ENERGY STAR cold climateNo
      Heating output as it gets colder58% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with GOS18V0RWAHD05 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.
      GOS18V0RWAHD0523.012.19.110,600215412990
      Yearly running cost in 10 large cities$377-$1,218

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

      Questions5
      What is the SEER2 rating of the HAVELLS GOS18V0RWAHD05?
      The HAVELLS GOS18V0RWAHD05 is rated at up to 23.0 SEER2 and 12.1 EER2 for cooling and up to 9.1 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
      Is the HAVELLS GOS18V0RWAHD05 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 HAVELLS GOS18V0RWAHD05 cost to run per year?
      At its rated efficiency it costs about $377-$1,218 a year in electricity in large U.S. cities, depending on climate and local rates - for example $494 in Phoenix and $1,040 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
      Which indoor units work with the HAVELLS GOS18V0RWAHD05?
      ENERGY STAR lists 1 certified combination for this outdoor unit. The highest-rated one uses GOS18V0RWAHD05.
      What refrigerant does the HAVELLS GOS18V0RWAHD05 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 $505/yrYou save $438/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 HAVELLS GOS18V0RWAHD05
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $505
      Current system, per year
      $944
      You save per year
      $438
      Payback
      16.0 years
      Net after 10 years
      -$2,617

      Cooling $280Heating $225Electricity used: 3,158 kWhSaved vs. a minimum-efficiency heat pump: $218

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

      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of May 29, 2026. How we use the data.