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      15,000 BTU mini-split heat pump · KUSAL151A

      LG KUSAL151A

      Very good cooling and heating efficiency for a 15,000 BTU mini-split heat pump, and certified for cold climates.

      Ranks #11 of 62 15,000 BTU mini-splits for cooling efficiency, and costs about $384 a year to run in a mixed climate like Atlanta.

      SEER2
      25.0 Cooling efficiency over a season
      Very good · beats 83%
      HSPF2
      11.2 Heating efficiency over a season
      Very good · beats 79%
      EER2
      15.0 Cooling efficiency on a 95°F day
      Excellent · beats 91%
      Heat at 5°F
      18,000 BTU/h100% of its 47°F output
      Below average · beats 27%

      A good fit if…

      • You want low cooling bills - its SEER2 beats 83% of mini-splits.
      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 18,000 BTU/h at 5°F.
      • It will heat most of the year - its HSPF2 beats 79% of mini-splits.
      • 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

      Specifications15,000 BTU, R-32
      General
      BrandLG
      Outdoor unit modelKUSAL151A
      SeriesKUSAL151A
      TypeMini-split heat pump
      Nominal size15,000 BTU
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-32
      Connected (smart) capableNo
      On the market sinceOctober 10, 2024
      Last certifiedMarch 4, 2025
      Cooling
      SEER2Seasonal efficiency, higher is better25.0 (range 25.0)
      EER2Efficiency at 95°F outdoors15.0
      Cooling capacity15,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better11.2
      Capacity at 47°F18,000 BTU/h
      Capacity at 17°F10,900 BTU/h
      Capacity at 5°F18,000 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.90
      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 KNSAL151A 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.
      KNSAL151A · cold climate25.015.011.218,000215828274
      Yearly running cost in 10 large cities$285-$965

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

      Questions5
      What is the SEER2 rating of the LG KUSAL151A?
      The LG KUSAL151A is rated at up to 25.0 SEER2 and 15.0 EER2 for cooling and up to 11.2 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
      Is the LG KUSAL151A 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 1.90, so it is still 1.9 times as efficient as electric resistance heat at that temperature.
      How much does the LG KUSAL151A cost to run per year?
      At its rated efficiency it costs about $285-$965 a year in electricity in large U.S. cities, depending on climate and local rates - for example $380 in Phoenix and $828 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 LG KUSAL151A?
      ENERGY STAR lists 1 certified combination for this outdoor unit. The highest-rated one uses KNSAL151A.
      What refrigerant does the LG KUSAL151A 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 $391/yrYou save $431/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 LG KUSAL151A
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $391
      Current system, per year
      $823
      You save per year
      $431
      Payback
      12.8 years
      Net after 10 years
      -$1,187

      Cooling $211Heating $180Electricity used: 2,445 kWhSaved vs. a minimum-efficiency heat pump: $247

      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 15,000 BTU models

      See all 62 15,000 BTU mini-splits, ranked

      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of March 4, 2025. How we use the data.