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      2-ton central heat pump · DAVE LENNOX SIGNATURE DLSC SL22KLV SERIES

      Lennox SL22KLV-024-230A

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

      Ranks #18 of 331 2 ton central heat pumps for cooling efficiency, and costs about $585 a year to run in a mixed climate like Atlanta.

      SEER2
      20.5 Cooling efficiency over a season
      Excellent · beats 96%
      HSPF2
      10.5 Heating efficiency over a season
      Excellent · beats 96%
      EER2
      13.0 Cooling efficiency on a 95°F day
      Very good · beats 89%
      Heat at 5°F
      24,200 BTU/h102% of its 47°F output
      Very good · beats 88%

      A good fit if…

      • You want low cooling bills - its SEER2 beats 96% of central heat pumps.
      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 24,200 BTU/h at 5°F.
      • It will heat most of the year - its HSPF2 beats 96% of central heat pumps.
      • 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

      Specifications2 ton, R-454B
      General
      BrandLennox
      Outdoor unit modelSL22KLV-024-230A
      SeriesDAVE LENNOX SIGNATURE DLSC SL22KLV SERIES
      TypeCentral heat pump
      Nominal size2 ton
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-454B
      Connected (smart) capableNo
      On the market sinceNovember 14, 2024
      Last certifiedSeptember 30, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better20.5 (range 16.9-20.5)
      EER2Efficiency at 95°F outdoors11.0-13.2
      Cooling capacity21,000-23,200 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better8.2-10.5
      Capacity at 47°F17,900-24,000 BTU/h
      Capacity at 17°F18,600-28,800 BTU/h
      Capacity at 5°F17,700-24,200 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.74-2.30
      ENERGY STAR cold climateYes
      Heating output as it gets colder102% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with CK40HT-42C-**+TDR at the standard test temperatures, in BTU/h:

      Certified matchups107 indoor units

      The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 107 are shown. Ask your installer for the AHRI reference number of the exact system you are quoted.

      Indoor unitFurnaceSEER2EER2HSPF2Heat @5°FAHRI ref.
      CK40HT-42C-**+TDR · cold climateSL280UH080NV48B*20.513.09.622,200216776041
      CK40HT-42C-**+TDR · cold climateEL297UH090XV36C*20.512.89.622,200216776045
      CK40HT-42C-**+TDR · cold climateSLP99UH090XV36C*20.512.89.622,200216776053
      CK40HT-42C-**+TDR · cold climateSL297UH040NV36B*20.512.69.522,400216776042
      CK40HT-42C-**+TDR · cold climateEL297UH045XV36B*20.512.49.522,400216776044
      CK40[C,U]T-48B-**+TDR · cold climateSL280UH090V36B*20.513.08.517,800216968299
      CBK48MVT-042-230- · cold climate-20.013.010.522,800216379010
      CK40HT-42B-**+TDR · cold climateSL280UH090V36B*20.011.79.822,400216776035
      CK40HT-42C-**+TDR · cold climateEL297UH090XV48C*20.012.89.622,200216776046
      CK40HT-42C-**+TDR · cold climateSLP99UH090XV48C*20.012.89.622,200216776052
      CK40HT-42C-**+TDR · cold climateSL297UH060NV36B*20.012.69.522,400216776043
      CK40HT-42C-**+TDR · cold climateSL297UH080NV48C*20.012.69.522,400216776055
      CBK48MVT-036-230- · cold climate-20.013.09.021,400216776014
      CBK48MVT-030-230- · cold climate-20.013.09.021,400216968308
      CK40[C,U]T-48C-**+TDR · cold climateSLP99UH090XV36C*20.013.08.517,800216968289
      CK40[C,U]T-48C-**+TDR · cold climateEL297UH090XV36C*20.013.08.517,800216968293
      CK40[C,U]T-48B-**+TDR · cold climateSL280UH080NV48B*20.013.08.517,800216968298
      CK40[C,U]T-48B-**+TDR · cold climateSL297UH040NV36B*20.012.88.517,900216968302
      CK40[C,U]T-48B-**+TDR · cold climateSL297UH060NV36B*20.012.68.517,900216968303
      CK40[C,U]T-48B-**+TDR · cold climateSLP99UH070XV36B*20.012.88.517,900216968304
      CK40[C,U]T-48B-**+TDR · cold climateEL297UH045XV36B*20.012.68.518,000216968305
      CK40[C,U]T-48B-**+TDR · cold climateEL297UH070XV36B*20.012.88.517,900216968306
      CK40[C,U]T-30A-**+TDR · cold climateSL280UH060NV36A*20.012.68.222,800216776063
      CK40HT-42B-**+TDR · cold climateSL297UH060NV36B*19.511.510.222,400216776109
      CK40HT-42B-**+TDR · cold climateSL297UH040NV36B*19.511.510.222,400216776108
      CK40HT-42B-**+TDR · cold climateEL297UH045XV36B*19.511.510.222,800216776112
      CK40HT-42B-**+TDR · cold climateSL280UH080NV48B*19.511.79.822,400216776034
      CK40HT-42B-**+TDR · cold climateEL297UH070XV36B*19.511.59.822,400216776111
      CK40HT-42B-**+TDR · cold climateSLP99UH070XV36B*19.511.59.822,400216776110
      CK40HT-42C-**+TDR · cold climateSL280UH080NV60C*19.513.09.522,200216776039
      CK40HT-42C-**+TDR · cold climateEL297UH110XV48C*19.512.89.522,200216776048
      CBK48MVT-018/024-230- · cold climate-19.512.69.021,800216776013
      CK40[C,U]T-48C-**+TDR · cold climateSL297UH080NV48C*19.512.88.517,900216968287
      CK40[C,U]T-48C-**+TDR · cold climateSLP99UH090XV48C*19.513.08.517,800216968290
      CK40[C,U]T-48C-**+TDR · cold climateEL297UH090XV48C*19.513.08.517,800216968294
      CK40[C,U]T-48C-**+TDR · cold climateEL297UH110XV48C*19.513.08.517,800216968296
      CK40[C,U]T-48B-**+TDR · cold climateSL280UH090V48B*19.512.88.517,900216968300
      CK40[C,U]T-48B-**+TDR · cold climateSL280UH090XV48B*19.512.88.517,900216968301
      CK40[C,U]T-30B-**+TDR · cold climateSL280UH080NV48B*19.512.48.222,800216776025
      CK40[C,U]T-30B-**+TDR · cold climateSL280UH090V36B*19.512.48.222,800216776026
      CK40[C,U]T-30B-**+TDR · cold climateSL297UH040NV36B*19.512.28.222,800216776029
      CK40[C,U]T-30B-**+TDR · cold climateSLP99UH070XV36B*19.512.28.222,800216776031
      CK40[C,U]T-30B-**+TDR · cold climateEL297UH070XV36B*19.512.28.222,800216776033
      CK40HT-42B-**+TDR · cold climateSL280UH090V48B*19.011.79.822,400216776036
      CK40HT-42B-**+TDR · cold climateSL280UH090XV48B*19.011.79.822,400216776037
      CK40HT-42C-**+TDR · cold climateEL297UH090XV60C*19.012.89.522,200216776047
      CK40HT-42C-**+TDR · cold climateSLP99UH090XV60C*19.012.89.522,200216776051
      CK40[C,U]T-36B-**+TDR · cold climateSL280UH080NV48B*19.012.88.521,800216776015
      CK40[C,U]T-36B-**+TDR · cold climateSL280UH090V36B*19.012.88.521,800216776016
      CK40[C,U]T-36B-**+TDR · cold climateSLP99UH070XV36B*19.012.48.522,000216776021
      CK40[C,U]T-36B-**+TDR · cold climateEL297UH070XV36B*19.012.48.522,000216776023
      CK40[C,U]T-36A-**+TDR · cold climateSL280UH060NV36A*19.012.88.521,800216776060
      CK40[C,U]T-48C-**+TDR · cold climateSL280UH080NV60C*19.013.28.517,700216968281
      CK40[C,U]T-36C-**+TDR · cold climateSLP99UH090XV36C*19.012.88.519,000218073776
      CK40[C,U]T-30B-**+TDR · cold climateSL280UH090V48B*19.012.48.222,800216776027
      CK40[C,U]T-30B-**+TDR · cold climateSL280UH090XV48B*19.012.48.222,800216776028
      CK40[C,U]T-30B-**+TDR · cold climateSL297UH060NV36B*19.012.28.222,800216776030
      CK40[C,U]T-30B-**+TDR · cold climateEL297UH045XV36B*19.012.08.223,000216776032
      CK40[C,U]T-30A-**+TDR · cold climateSL280UH070V36A*19.012.48.222,800216776064
      CK40[C,U]T-30A-**+TDR · cold climateSL280UH070XV36A*19.012.48.222,800216776065
      Yearly running cost in 10 large cities$518-$1,403

      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 SL22KLV-024-230A?
      The Lennox SL22KLV-024-230A is rated at up to 20.5 SEER2 and 13.0 EER2 for cooling and up to 10.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 107 certified matchups SEER2 ranges from 16.9-20.5.
      Is the Lennox SL22KLV-024-230A good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 24,200 BTU/h at 5°F with a COP of 2.30, so it is still 2.3 times as efficient as electric resistance heat at that temperature.
      How much does the Lennox SL22KLV-024-230A cost to run per year?
      At its rated efficiency it costs about $518-$1,403 a year in electricity in large U.S. cities, depending on climate and local rates - for example $641 in Phoenix and $1,174 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 SL22KLV-024-230A?
      ENERGY STAR lists 107 certified combinations for this outdoor unit. The highest-rated ones use CK40HT-42C-**+TDR, CK40[C,U]T-48B-**+TDR, CBK48MVT-042-230-.
      What refrigerant does the Lennox SL22KLV-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 $638/yrYou save $541/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 SL22KLV-024-230A
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $638
      Current system, per year
      $1,178
      You save per year
      $541
      Payback
      15.7 years
      Net after 10 years
      -$3,093

      Cooling $388Heating $250Electricity used: 3,985 kWhSaved vs. a minimum-efficiency heat pump: $268

      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 September 30, 2026. How we use the data.