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      2-ton central heat pump · ML15KSPV Series

      Lennox ML15KSPV-024-230A

      Average cooling and heating efficiency for a 2-ton central heat pump, and certified for cold climates.

      Ranks #244 of 331 2 ton central heat pumps for cooling efficiency, and costs about $712 a year to run in a mixed climate like Atlanta.

      SEER2
      16.8 Cooling efficiency over a season
      Average · beats 45%
      HSPF2
      8.9 Heating efficiency over a season
      Average · beats 50%
      EER2
      9.0 Cooling efficiency on a 95°F day
      Below average · beats 4%
      Heat at 5°F
      18,900 BTU/h75% of its 47°F output
      Below average · beats 20%

      A good fit if…

      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 18,900 BTU/h at 5°F.
      • You want steady temperatures and quiet running - the compressor varies its speed.
      • You want a choice of indoor units - 110 certified pairings.

      Think twice if…

      • Nothing stands out - its ratings have no weak spot for its class.

      Calculate my running cost

      Details

      Specifications2 ton, R-454B
      General
      BrandLennox
      Outdoor unit modelML15KSPV-024-230A
      SeriesML15KSPV Series
      TypeCentral heat pump
      Nominal size2 ton
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-454B
      Connected (smart) capableNo
      On the market sinceFebruary 6, 2026
      Last certifiedJuly 16, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better16.8 (range 15.2-16.8)
      EER2Efficiency at 95°F outdoors9.0-9.7
      Cooling capacity22,600-24,400 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better8.1-8.9
      Capacity at 47°F23,400-25,000 BTU/h
      Capacity at 17°F17,900-18,900 BTU/h
      Capacity at 5°F17,900-18,900 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.80-1.90
      ENERGY STAR cold climateYes
      Heating output as it gets colder75% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with CBK48MVT-018/024-230- at the standard test temperatures, in BTU/h:

      Certified matchups110 indoor units

      The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 110 are shown. Ask your installer for the AHRI reference number of the exact system you are quoted.

      Indoor unitFurnaceSEER2EER2HSPF2Heat @5°FAHRI ref.
      CBK48MVT-018/024-230- · cold climate-16.89.08.818,800218616030
      CBK47UHET-030-230- · cold climate-16.79.58.918,500218616029
      CK40[C,U]T-36B-**+TDR · cold climateML296UH045XV36B*16.69.68.218,100218617636
      CK40[C,U]T-36B-**+TDR · cold climateSL280UH090V36B*16.69.78.218,000218617624
      CK40[C,U]T-36B-**+TDR · cold climateSL297UH040NV36B*16.69.68.218,100218617586
      CK40[C,U]T-36A-**+TDR · cold climateEL280UH045E36A*16.69.78.218,000218617579
      CK40HT-30A-**+TDR · cold climateEL280UH045E36A*16.59.78.417,900218617597
      CK40[C,U]T-36B-**+TDR · cold climateML296UH070XV36B*16.59.68.218,100218617637
      CK40[C,U]T-36A-**+TDR · cold climateML180UH030V36A*16.59.78.218,000218617621
      CK40HT-30B-**+TDR · cold climateML296UH070XV36B*16.59.68.118,200218617666
      CK40HT-30B-**+TDR · cold climateML180UH070V48B*16.59.78.118,100218617659
      CK40HT-30A-**+TDR · cold climateML180UH030V36A*16.49.78.417,900218617651
      CK40HT-30B-**+TDR · cold climateML296UH045XV36B*16.49.68.218,200218617665
      CK40HT-24B-**+TDR · cold climateSL280UH090V36B*16.49.68.218,100218617648
      CK40HT-24B-**+TDR · cold climateML296UH070XV36B*16.49.58.218,200218617647
      CK40HT-24B-**+TDR · cold climateML296UH045XV36B*16.49.68.218,200218617646
      CK40HT-30B-**+TDR · cold climateSL297UH040NV36B*16.49.58.218,200218617603
      CK40HT-24B-**+TDR · cold climateSL297UH040NV36B*16.49.58.218,200218617593
      CK40[C,U]T-36B-**+TDR · cold climateSLP99UH070XV36B*16.49.78.218,000218617588
      CK40HT-30B-**+TDR · cold climateSL280UH090V36B*16.49.78.118,100218617667
      CBK43UHET-030-DV · cold climate-16.39.28.918,600218616024
      CBK43UHET-024-DV · cold climate-16.39.28.918,600218616023
      CK40HT-30A-**+TDR · cold climateML180UH070V36A*16.39.68.417,900218617653
      CK40[C,U]T-36B-**+TDR · cold climateEL297UH070XV36B*16.39.68.218,100218617631
      CK40[C,U]T-36A-**+TDR · cold climateML180UH070V36A*16.39.68.218,100218617623
      CK40[C,U]T-36A-**+TDR · cold climateEL180UH060NE36A*16.39.48.218,200218617577
      CK40[C,U]T-36A-**+TDR · cold climateEL180UH040NE36A*16.39.48.218,200218617576
      CK40HT-30B-**+TDR · cold climateML180UH090V48B*16.39.48.118,300218617660
      CK40HT-30B-**+TDR · cold climateEL297UH070XV36B*16.39.68.118,100218617657
      CK40[C,U]T-24B-**+TDR · cold climateML180UH070V48B*16.39.58.118,200218617612
      CBK48MVT-030-230- · cold climate-16.29.38.918,500218616031
      CBK45UHET-024-230- · cold climate-16.29.38.718,700218616025
      CBK45UHVT-030-230- · cold climate-16.29.18.518,900218616027
      CBK45UHET-030-230- · cold climate-16.29.48.518,700218616026
      CK40HT-30A-**+TDR · cold climateML180UH045E36A*16.29.48.418,100218617599
      CK40[C,U]T-36B-**+TDR · cold climateEL297UH045XV36B*16.29.58.218,100218617630
      CK40[C,U]T-36B-**+TDR · cold climateML180UH070V36B*16.29.78.218,000218617626
      CK40[C,U]T-36A-**+TDR · cold climateML180UH045V36A*16.29.68.218,100218617622
      CK40[C,U]T-36B-**+TDR · cold climateSL297UH060NV36B*16.29.58.218,100218617587
      CK40HT-30B-**+TDR · cold climateML196UH030XE36B*16.29.38.118,400218617664
      CK40HT-30B-**+TDR · cold climateML193UH070XE36B*16.29.58.118,200218617663
      CK40HT-24B-**+TDR · cold climateEL297UH070XV36B*16.29.68.118,200218617642
      CK40[C,U]T-36B-**+TDR · cold climateML193UH070XE36B*16.29.58.118,200218617635
      CK40HT-30B-**+TDR · cold climateSLP99UH070XV36B*16.29.68.118,100218617604
      CK40HT-24B-**+TDR · cold climateSLP99UH070XV36B*16.29.68.118,200218617595
      CK40HT-30A-**+TDR · cold climateML180UH045XE36A*16.19.78.417,900218617601
      CK40HT-30A-**+TDR · cold climateSL280UH060NV36A*16.19.68.418,000218617596
      CK40[C,U]T-36B-**+TDR · cold climateEL280UH090E36B*16.19.78.218,000218617625
      CK40[C,U]T-24B-**+TDR · cold climateEL280UH090E36B*16.19.28.218,400218617607
      CK40HT-30B-**+TDR · cold climateEL196UH030XE36B*16.19.58.118,200218617654
      CK40HT-24B-**+TDR · cold climateML193UH070XE36B*16.19.48.118,300218617645
      CK40HT-24A-**+TDR · cold climateML180UH030V36A*16.19.58.118,200218617638
      CK40[C,U]T-36B-**+TDR · cold climateML193UH030XE36B*16.19.38.118,300218617633
      CK40[C,U]T-36B-**+TDR · cold climateEL196UH030XE36B*16.19.58.118,100218617627
      CK40[C,U]T-24B-**+TDR · cold climateSL280UH090V36B*16.19.58.118,200218617618
      CK40[C,U]T-24B-**+TDR · cold climateML296UH045XV36B*16.19.48.118,300218617616
      CK40[C,U]T-36A-**+TDR · cold climateSL280UH060NV36A*16.19.68.118,100218617575
      CBK45UHVT-024-230- · cold climate-16.09.08.518,000218082938
      CK40HT-30A-**+TDR · cold climateML180UH045V36A*16.09.68.417,900218617652
      CK40HT-30A-**+TDR · cold climateEL280UH070XE36A*16.09.78.417,900218617650
      Yearly running cost in 10 large cities$654-$1,689

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

      Questions5
      What is the SEER2 rating of the Lennox ML15KSPV-024-230A?
      The Lennox ML15KSPV-024-230A is rated at up to 16.8 SEER2 and 9.0 EER2 for cooling and up to 8.9 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 110 certified matchups SEER2 ranges from 15.2-16.8.
      Is the Lennox ML15KSPV-024-230A good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 18,900 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 Lennox ML15KSPV-024-230A cost to run per year?
      At its rated efficiency it costs about $654-$1,689 a year in electricity in large U.S. cities, depending on climate and local rates - for example $798 in Phoenix and $1,405 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 Lennox ML15KSPV-024-230A?
      ENERGY STAR lists 110 certified combinations for this outdoor unit. The highest-rated ones use CBK48MVT-018/024-230-, CBK47UHET-030-230-, CK40[C,U]T-36B-**+TDR.
      What refrigerant does the Lennox ML15KSPV-024-230A 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 $787/yrYou save $423/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 ML15KSPV-024-230A
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $787
      Current system, per year
      $1,210
      You save per year
      $423
      Payback
      21.3 years
      Net after 10 years
      -$4,774

      Cooling $490Heating $297Electricity used: 4,920 kWhSaved vs. a minimum-efficiency heat pump: $141

      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 July 16, 2026. How we use the data.