HVAC Rated
    Menu

      24,000 BTU mini-split heat pump · KUSAF241F

      LG KUSAF241F

      Below average cooling and heating efficiency for a 24,000 BTU mini-split heat pump, but not rated for cold climates.

      Ranks #416 of 430 24,000 BTU mini-splits for cooling efficiency, and costs about $687 a year to run in a mixed climate like Atlanta.

      SEER2
      18.0 Cooling efficiency over a season
      Below average · beats 4%
      HSPF2
      8.0 Heating efficiency over a season
      Below average · beats 0%
      EER2
      11.0 Cooling efficiency on a 95°F day
      Below average · beats 9%
      Heat at 5°F
      15,500 BTU/h70% of its 47°F output
      Below average · beats 36%

      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.
      • Cooling cost matters most - its SEER2 is below average for mini-splits.
      • You mainly need heat - its HSPF2 is below average for mini-splits.

      Calculate my running cost

      Details

      Specifications24,000 BTU, R-32
      General
      BrandLG
      Outdoor unit modelKUSAF241F
      SeriesKUSAF241F
      TypeMini-split heat pump
      Nominal size24,000 BTU
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-32
      Connected (smart) capableNo
      On the market sinceFebruary 6, 2026
      Last certifiedMarch 27, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better18.0 (range 18.0)
      EER2Efficiency at 95°F outdoors11.0
      Cooling capacity21,200 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better8.0
      Capacity at 47°F22,000 BTU/h
      Capacity at 17°F14,400 BTU/h
      Capacity at 5°F15,500 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.96
      ENERGY STAR cold climateNo
      Heating output as it gets colder70% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with KNSAF241F 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.
      KNSAF241F18.011.08.015,500218070883
      Yearly running cost in 10 large cities$557-$1,688

      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 KUSAF241F?
      The LG KUSAF241F is rated at up to 18.0 SEER2 and 11.0 EER2 for cooling and up to 8.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
      Is the LG KUSAF241F 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 24,000 BTU model.
      How much does the LG KUSAF241F cost to run per year?
      At its rated efficiency it costs about $557-$1,688 a year in electricity in large U.S. cities, depending on climate and local rates - for example $714 in Phoenix and $1,431 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 KUSAF241F?
      ENERGY STAR lists 1 certified combination for this outdoor unit. The highest-rated one uses KNSAF241F.
      What refrigerant does the LG KUSAF241F 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 $723/yrYou save $384/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 KUSAF241F
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $723
      Current system, per year
      $1,106
      You save per year
      $384
      Payback
      20.9 years
      Net after 10 years
      -$4,164

      Cooling $415Heating $308Electricity used: 4,516 kWhSaved vs. a minimum-efficiency heat pump: $128

      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 24,000 BTU models

      See all 430 24,000 BTU mini-splits, ranked

      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of March 27, 2026. How we use the data.