HVAC Rated
    Menu

      3-ton central heat pump · DAVE LENNOX SIGNATURE SL22KLV SERIES

      Lennox SL22KLV-036-230A

      Excellent cooling and heating efficiency for a 3-ton central heat pump, and certified for cold climates.

      Ranks #17 of 302 3 ton central heat pumps for cooling efficiency, and costs about $830 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
      13.6 Cooling efficiency on a 95°F day
      Excellent · beats 96%
      Heat at 5°F
      34,000 BTU/h85% of its 47°F output
      Excellent · beats 96%

      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 34,000 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

      Specifications3 ton, R-454B
      General
      BrandLennox
      Outdoor unit modelSL22KLV-036-230A
      SeriesDAVE LENNOX SIGNATURE SL22KLV SERIES
      TypeCentral heat pump
      Nominal size3 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 16.5-20.5)
      EER2Efficiency at 95°F outdoors11.2-13.6
      Cooling capacity33,000-35,600 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better8.0-10.5
      Capacity at 47°F30,000-32,800 BTU/h
      Capacity at 17°F26,600-33,800 BTU/h
      Capacity at 5°F24,400-34,000 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.84-2.42
      ENERGY STAR cold climateYes
      Heating output as it gets colder85% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with CK40HT-51/61C-**+TDR at the standard test temperatures, in BTU/h:

      Certified matchups80 indoor units

      The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 80 are shown. Ask your installer for the AHRI reference number of the exact system you are quoted.

      Indoor unitFurnaceSEER2EER2HSPF2Heat @5°FAHRI ref.
      CK40HT-51/61C-**+TDR · cold climateSL280UH090V60C*20.513.68.526,400217476482
      CK40HT-51/61C-**+TDR · cold climateSL280UH090XV60C*20.513.68.526,400217476483
      CBK48MVT-060-230- · cold climate-20.013.010.533,200216776011
      CBK48MVT-042-230- · cold climate-20.012.88.534,000216776067
      CK40HT-51/61C-**+TDR · cold climateSL280UH080NV60C*20.013.48.526,600217476481
      CK40HT-51/61C-**+TDR · cold climateSL280UH100NV60C*20.013.48.526,600217476484
      CK40HT-51/61C-**+TDR · cold climateSL280UH110V60C*20.013.48.526,600217476485
      CK40HT-51/61C-**+TDR · cold climateSL280UH110XV60C*20.013.48.526,600217476486
      CK40HT-51/61C-**+TDR · cold climateSL297UH080NV48C*20.013.28.526,600217476487
      CK40HT-51/61C-**+TDR · cold climateSLP99UH090XV48C*20.013.28.526,600217476489
      CK40HT-51/61C-**+TDR · cold climateSLP99UH110XV60C*20.013.48.526,600217476491
      CK40HT-51/61C-**+TDR · cold climateEL297UH090XV48C*20.013.28.526,600217476493
      CK40HT-51/61C-**+TDR · cold climateEL297UH110XV48C*20.013.48.526,600217476495
      CK40HT-51/61C-**+TDR · cold climateEL297UH110XV60C*20.013.48.526,600217476496
      CK40[C,U]T-49C-**+TDR · cold climateSL280UH080NV60C*19.513.29.031,200216776068
      CK40HT-51/61C-**+TDR · cold climateSL297UH080NV60C*19.513.28.526,800217476488
      CK40HT-51/61C-**+TDR · cold climateSLP99UH090XV60C*19.513.48.526,600217476490
      CK40HT-51/61C-**+TDR · cold climateSL280UH080NV48B*19.513.28.526,800217476492
      CK40HT-51/61C-**+TDR · cold climateEL297UH090XV60C*19.513.48.526,600217476494
      CK40HT-42B-**+TDR · cold climateSL280UH080NV48B*19.513.08.231,200216776083
      CK40[C,U]T-60C-**+TDR · cold climateSL280UH090V60C*19.012.810.026,400217476507
      CK40[C,U]T-60C-**+TDR · cold climateSL280UH090XV60C*19.012.810.026,400217476508
      CK40[C,U]T-60C-**+TDR · cold climateEL297UH110XV48C*19.012.69.826,600217476519
      CK40[C,U]T-49C-**+TDR · cold climateSL280UH090V60C*19.013.09.031,400216776069
      CK40[C,U]T-49C-**+TDR · cold climateSL280UH090XV60C*19.013.09.031,400216776070
      CK40[C,U]T-49C-**+TDR · cold climateSL280UH100NV60C*19.013.29.031,200216776071
      CK40[C,U]T-49C-**+TDR · cold climateSL297UH080NV48C*19.012.89.031,600216776074
      CK40[C,U]T-49C-**+TDR · cold climateSLP99UH090XV48C*19.012.89.031,600216776076
      CK40[C,U]T-49C-**+TDR · cold climateSLP99UH090XV60C*19.012.89.031,600216776077
      CK40[C,U]T-49C-**+TDR · cold climateEL297UH090XV48C*19.012.89.031,600216776079
      CK40[C,U]T-49C-**+TDR · cold climateEL297UH090XV60C*19.012.89.031,600216776080
      CK40[C,U]T-49C-**+TDR · cold climateEL297UH110XV48C*19.012.89.031,600216776081
      CK40HT-42B-**+TDR · cold climateSLP99UH070XV36B*19.012.48.127,800217476480
      CK40[C,U]T-60C-**+TDR · cold climateSL280UH080NV60C*18.512.69.826,600217476506
      CK40[C,U]T-60C-**+TDR · cold climateSL280UH100NV60C*18.512.89.826,600217476509
      CK40[C,U]T-60C-**+TDR · cold climateSL280UH110V60C*18.512.89.826,600217476510
      CK40[C,U]T-60C-**+TDR · cold climateSL280UH110XV60C*18.512.89.826,600217476511
      CK40[C,U]T-60C-**+TDR · cold climateSL297UH080NV48C*18.512.69.826,600217476512
      CK40[C,U]T-60C-**+TDR · cold climateSLP99UH090XV48C*18.512.69.826,600217476514
      CK40[C,U]T-60C-**+TDR · cold climateSLP99UH090XV60C*18.512.69.826,600217476515
      CK40[C,U]T-60C-**+TDR · cold climateSLP99UH110XV60C*18.512.89.826,600217476516
      CK40[C,U]T-60C-**+TDR · cold climateEL297UH090XV60C*18.512.69.826,600217476518
      CK40[C,U]T-60C-**+TDR · cold climateEL297UH090XV48C*18.512.69.826,600217476517
      CK40[C,U]T-60C-**+TDR · cold climateEL297UH110XV60C*18.512.89.826,600217476520
      CK40[C,U]T-60D-**+TDR · cold climateSL280UH135V60D*18.511.79.424,400217476459
      CK40[C,U]T-60D-**+TDR · cold climateSLP99UH135XV60D*18.511.79.424,400217476462
      CK40[C,U]T-60D-**+TDR · cold climateEL297UH110XV60C*18.511.79.424,400217476463
      CK40[C,U]T-60D-**+TDR · cold climateEL297UH135XV60D*18.511.79.424,400217476464
      CK40[C,U]T-49C-**+TDR · cold climateSL280UH110XV60C*18.512.89.031,600216776073
      CK40[C,U]T-49C-**+TDR · cold climateSL280UH110V60C*18.512.89.031,600216776072
      CK40[C,U]T-49C-**+TDR · cold climateSLP99UH110XV60C*18.512.89.031,600216776078
      CK40[C,U]T-49C-**+TDR · cold climateEL297UH110XV60C*18.512.89.031,600216776082
      CK40[C,U]T-60D-**+TDR · cold climateSL297UH080NV48C*18.511.59.024,600217476460
      CK40CT-49C-**+DF KIT · cold climateSL280DF110V60C*18.511.79.031,600218808449
      CK40[C,U]T-49C-**+TDR · cold climateSL297UH080NV60C*18.512.68.527,600216776075
      CBK48MVT-048-230- · cold climate-18.512.88.230,400216776066
      CK40HT-42B-**+TDR · cold climateSL280UH090V48B*18.512.68.231,400216776084
      CK40HT-42B-**+TDR · cold climateSL280UH090XV48B*18.512.68.231,400216776085
      CK40[C,U]T-60C-**+TDR · cold climateSL297UH080NV60C*18.012.69.826,800217476513
      CK40[C,U]T-60D-**+TDR · cold climateSL297UH080NV60C*18.011.29.024,600217476461
      Yearly running cost in 10 large cities$789-$1,938

      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-036-230A?
      The Lennox SL22KLV-036-230A is rated at up to 20.5 SEER2 and 13.6 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 80 certified matchups SEER2 ranges from 16.5-20.5.
      Is the Lennox SL22KLV-036-230A good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 34,000 BTU/h at 5°F with a COP of 2.42, so it is still 2.4 times as efficient as electric resistance heat at that temperature.
      How much does the Lennox SL22KLV-036-230A cost to run per year?
      At its rated efficiency it costs about $789-$1,938 a year in electricity in large U.S. cities, depending on climate and local rates - for example $958 in Phoenix and $1,598 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-036-230A?
      ENERGY STAR lists 80 certified combinations for this outdoor unit. The highest-rated ones use CK40HT-51/61C-**+TDR, CBK48MVT-060-230-, CBK48MVT-042-230-.
      What refrigerant does the Lennox SL22KLV-036-230A 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 $936/yrYou save $810/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-036-230A
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $936
      Current system, per year
      $1,746
      You save per year
      $810
      Payback
      16.1 years
      Net after 10 years
      -$4,901

      Cooling $601Heating $335Electricity used: 5,849 kWhSaved vs. a minimum-efficiency heat pump: $395

      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 3 ton models

      See all 302 3 ton central heat pumps, ranked

      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of September 30, 2026. How we use the data.