HVAC Rated
    Menu

      1.5-ton central heat pump · E Series

      Kinghome KU18UXO

      Average cooling and heating efficiency for a 1.5-ton central heat pump, and certified for cold climates.

      Ranks #65 of 170 1.5 ton central heat pumps for cooling efficiency, and costs about $527 a year to run in a mixed climate like Atlanta.

      SEER2
      18.0 Cooling efficiency over a season
      Average · beats 66%
      HSPF2
      9.0 Heating efficiency over a season
      Average · beats 54%
      EER2
      12.5 Cooling efficiency on a 95°F day
      Very good · beats 80%
      Heat at 5°F
      18,000 BTU/h100% of its 47°F output
      Below average · beats 39%

      A good fit if…

      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 18,000 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

      Specifications1.5 ton, R-32
      General
      BrandKinghome
      Outdoor unit modelKU18UXO
      SeriesE Series
      TypeCentral heat pump
      Nominal size1.5 ton
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-32
      Connected (smart) capableNo
      On the market sinceFebruary 28, 2025
      Last certifiedJuly 16, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better18.0 (range 18.0)
      EER2Efficiency at 95°F outdoors12.5
      Cooling capacity18,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better9.0
      Capacity at 47°F18,000 BTU/h
      Capacity at 17°F14,500 BTU/h
      Capacity at 5°F18,000 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater2.00
      ENERGY STAR cold climateYes
      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 KD18UXI 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.
      KD18UXI · cold climate18.012.59.018,000218473000
      Yearly running cost in 10 large cities$470-$1,262

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

      Questions5
      What is the SEER2 rating of the Kinghome KU18UXO?
      The Kinghome KU18UXO is rated at up to 18.0 SEER2 and 12.5 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 Kinghome KU18UXO good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 18,000 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 Kinghome KU18UXO cost to run per year?
      At its rated efficiency it costs about $470-$1,262 a year in electricity in large U.S. cities, depending on climate and local rates - for example $580 in Phoenix and $1,055 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 Kinghome KU18UXO?
      ENERGY STAR lists 1 certified combination for this outdoor unit. The highest-rated one uses KD18UXI.
      What refrigerant does the Kinghome KU18UXO 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 $576/yrYou save $352/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 Kinghome KU18UXO
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $576
      Current system, per year
      $928
      You save per year
      $352
      Payback
      19.9 years
      Net after 10 years
      -$3,479

      Cooling $352Heating $224Electricity used: 3,600 kWhSaved vs. a minimum-efficiency heat pump: $136

      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 1.5 ton models

      See all 170 1.5 ton central heat pumps, ranked

      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of July 16, 2026. How we use the data.