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      24,000 BTU mini-split heat pump · Lennox Real

      Lennox VPC024H5M-3P

      Below average cooling efficiency and average heating efficiency for a 24,000 BTU mini-split heat pump, and certified for cold climates.

      Ranks #399 of 430 24,000 BTU mini-splits for cooling efficiency, and costs about $647 a year to run in a mixed climate like Atlanta.

      SEER2
      18.5 Cooling efficiency over a season
      Below average · beats 6%
      HSPF2
      10.0 Heating efficiency over a season
      Average · beats 43%
      EER2
      11.7 Cooling efficiency on a 95°F day
      Below average · beats 16%
      Heat at 5°F
      20,000 BTU/h77% of its 47°F output
      Below average · beats 9%

      A good fit if…

      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 20,000 BTU/h at 5°F.
      • You want steady temperatures and quiet running - the compressor varies its speed.

      Think twice if…

      • Cooling cost matters most - its SEER2 is below average for mini-splits.

      Calculate my running cost

      Details

      Specifications24,000 BTU, R-454B
      General
      BrandLennox
      Outdoor unit modelVPC024H5M-3P
      SeriesLennox Real
      TypeMini-split heat pump
      Nominal size24,000 BTU
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-454B
      Connected (smart) capableNo
      On the market sinceNovember 20, 2024
      Last certifiedApril 17, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better18.5 (range 17.0-18.5)
      EER2Efficiency at 95°F outdoors11.7
      Cooling capacity22,000-24,400 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better9.0-10.0
      Capacity at 47°F25,000-26,000 BTU/h
      Capacity at 17°F17,700-18,300 BTU/h
      Capacity at 5°F20,000 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.80
      ENERGY STAR cold climateYes
      Heating output as it gets colder77% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its best matchup at the standard test temperatures, in BTU/h:

      Certified matchups6 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.
      - LENNOX · cold climate18.511.710.020,000216369726
      - LENNOX · cold climate18.511.710.020,000217197061
      - LENNOX · cold climate17.811.79.520,000216369732
      - LENNOX · cold climate17.811.79.520,000217197067
      - LENNOX · cold climate17.011.79.020,000216369720
      - LENNOX · cold climate17.011.79.020,000217197055
      Yearly running cost in 10 large cities$560-$1,563

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

      Questions4
      What is the SEER2 rating of the Lennox VPC024H5M-3P?
      The Lennox VPC024H5M-3P is rated at up to 18.5 SEER2 and 11.7 EER2 for cooling and up to 10.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 6 certified matchups SEER2 ranges from 17.0-18.5.
      Is the Lennox VPC024H5M-3P good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 20,000 BTU/h at 5°F with a COP of 1.80, so it is still 1.8 times as efficient as electric resistance heat at that temperature.
      How much does the Lennox VPC024H5M-3P cost to run per year?
      At its rated efficiency it costs about $560-$1,563 a year in electricity in large U.S. cities, depending on climate and local rates - for example $699 in Phoenix and $1,313 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
      What refrigerant does the Lennox VPC024H5M-3P use?
      It uses R-454B.

      Running cost and savings

      Pre-filled with this model. Pick your city and what you heat with today; everything else is optional.

      Heat pump $699/yrYou save $485/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 Lennox VPC024H5M-3P
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $699
      Current system, per year
      $1,183
      You save per year
      $485
      Payback
      17.5 years
      Net after 10 years
      -$3,651

      Cooling $419Heating $280Electricity used: 4,366 kWhSaved vs. a minimum-efficiency heat pump: $216

      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 April 17, 2026. How we use the data.