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      2-ton central heat pump · DAVE LENNOX SIGNATURE SL25XPV SERIES

      Lennox SL25XPV-024-230A

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

      Ranks #3 of 331 2 ton central heat pumps for cooling efficiency, and costs about $591 a year to run in a mixed climate like Atlanta.

      SEER2
      22.8 Cooling efficiency over a season
      Excellent · beats 99%
      HSPF2
      9.2 Heating efficiency over a season
      Average · beats 61%
      EER2
      14.4 Cooling efficiency on a 95°F day
      Excellent · beats 100%
      Heat at 5°F
      21,200 BTU/h95% of its 47°F output
      Below average · beats 15%

      A good fit if…

      • You want low cooling bills - its SEER2 beats 99% of central heat pumps.
      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 21,200 BTU/h at 5°F.
      • You want steady temperatures and quiet running - the compressor varies its speed.

      Think twice if…

      • You want the newest refrigerant - it uses R-410A, which is being phased down.

      Calculate my running cost

      Details

      Specifications2 ton, R-410A
      General
      BrandLennox
      Outdoor unit modelSL25XPV-024-230A
      SeriesDAVE LENNOX SIGNATURE SL25XPV SERIES
      TypeCentral heat pump
      Nominal size2 ton
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-410A
      Connected (smart) capableNo
      On the market sinceOctober 12, 2021
      Last certifiedJune 29, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better22.8 (range 22.8)
      EER2Efficiency at 95°F outdoors14.4
      Cooling capacity22,200 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better9.2
      Capacity at 47°F22,200 BTU/h
      Capacity at 17°F25,200 BTU/h
      Capacity at 5°F21,200 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.88
      ENERGY STAR cold climateYes
      Heating output as it gets colder95% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with CBA38MV-030-230*+TDR 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.
      CBA38MV-030-230*+TDR · cold climate22.814.49.221,200207436166
      Yearly running cost in 10 large cities$461-$1,467

      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 SL25XPV-024-230A?
      The Lennox SL25XPV-024-230A is rated at up to 22.8 SEER2 and 14.4 EER2 for cooling and up to 9.2 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
      Is the Lennox SL25XPV-024-230A good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 21,200 BTU/h at 5°F with a COP of 1.88, so it is still 1.9 times as efficient as electric resistance heat at that temperature.
      How much does the Lennox SL25XPV-024-230A cost to run per year?
      At its rated efficiency it costs about $461-$1,467 a year in electricity in large U.S. cities, depending on climate and local rates - for example $601 in Phoenix and $1,250 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 SL25XPV-024-230A?
      ENERGY STAR lists 1 certified combination for this outdoor unit. The highest-rated one uses CBA38MV-030-230*+TDR.
      What refrigerant does the Lennox SL25XPV-024-230A use?
      It uses R-410A. R-410A is being phased down under the EPA AIM Act, and new systems are moving to R-454B and 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 $613/yrYou save $532/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 SL25XPV-024-230A
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $613
      Current system, per year
      $1,145
      You save per year
      $532
      Payback
      16.0 years
      Net after 10 years
      -$3,183

      Cooling $343Heating $270Electricity used: 3,831 kWhSaved vs. a minimum-efficiency heat pump: $265

      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 2 ton models

      See all 331 2 ton central heat pumps, ranked

      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of June 29, 2026. How we use the data.