HVAC Rated
    Menu

      2-ton central heat pump · Merit ML16KP2 SERIES

      Lennox ML16KP2-024-230A

      Average cooling efficiency and below average heating efficiency for a 2-ton central heat pump, but not rated for cold climates.

      Ranks #199 of 331 2 ton central heat pumps for cooling efficiency, and costs about $717 a year to run in a mixed climate like Atlanta.

      SEER2
      17.5 Cooling efficiency over a season
      Average · beats 58%
      HSPF2
      8.2 Heating efficiency over a season
      Below average · beats 28%
      EER2
      13.0 Cooling efficiency on a 95°F day
      Very good · beats 89%
      Heat at 5°F
      11,100 BTU/h44% of its 47°F output
      Average · beats 67%

      A good fit if…

      • You want a choice of indoor units - 71 certified pairings.

      Think twice if…

      • You often see nights below 0°F - it is not cold-climate certified.
      • You mainly need heat - its HSPF2 is below average for central heat pumps.

      Calculate my running cost

      Details

      Specifications2 ton, R-454B
      General
      BrandLennox
      Outdoor unit modelML16KP2-024-230A
      SeriesMerit ML16KP2 SERIES
      TypeCentral heat pump
      Nominal size2 ton
      CompressorVariable-speed units run longer at low powerTwo-stage
      RefrigerantR-454B
      Connected (smart) capableNo
      On the market sinceMay 13, 2026
      Last certifiedAugust 20, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better17.5 (range 16.0-17.5)
      EER2Efficiency at 95°F outdoors12.0-13.5
      Cooling capacity22,400-24,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better7.8-8.2
      Capacity at 47°F21,200-23,600 BTU/h
      Capacity at 17°F12,700-14,300 BTU/h
      Capacity at 5°F9,900-11,100 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.94-2.14
      ENERGY STAR cold climateNo
      Heating output as it gets colder44% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with CK40DT-30/36B-**+TDR at the standard test temperatures, in BTU/h:

      Certified matchups71 indoor units

      The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 71 are shown. Ask your installer for the AHRI reference number of the exact system you are quoted.

      Indoor unitFurnaceSEER2EER2HSPF2Heat @5°FAHRI ref.
      CK40DT-30/36B-**+TDREL297DF045XV36B*17.513.07.810,200218457543
      CK40DT-24B-**+TDREL297DF045XV36B*17.013.08.110,900218457587
      CBK48MVT-018/024-230--17.013.08.110,800218457522
      CK40DT-24B-**+TDRSLP99DF070XV36B*17.013.08.010,800218457589
      CK40DT-24B-**+TDREL297DF070XV48B*17.012.58.011,100218457588
      CK40DT-24B-**+TDRML193DF070XE36B*17.012.58.011,000218457586
      CK40DT-24B-**+TDRSL280DF090V48B*17.012.58.011,100218457583
      CK40DT-24B-**+TDRML196DF045XE36B*17.012.58.011,000218457580
      CK40DT-24B-**+TDRML193DF045XE36B*17.012.58.011,000218457579
      CK40HT-24B-**+TDREL297UH070XV36B*17.013.07.810,300218457574
      CK40HT-24B-**+TDREL297UH045XV36B*17.013.07.810,400218457573
      CK40HT-24B-**+TDRSL297UH040NV36B*17.013.07.810,500218457570
      CK40HT-24B-**+TDRSL280UH090V48B*17.013.07.810,300218457569
      CK40HT-24B-**+TDRML296UH045XV36B*17.013.07.810,400218457568
      CK40HT-24B-**+TDRML193UH045XE36B*17.012.57.810,600218457567
      CK40HT-24B-**+TDRML180UH070E36B*17.013.07.810,300218457566
      CK40HT-24B-**+TDRML180UH045E36A*17.013.07.810,200218457565
      CK40HT-24B-**+TDREL280UH070E36A*17.013.07.810,500218457564
      CK40HT-24B-**+TDREL280UH045E36A*17.013.07.810,200218457563
      CK40HT-24B-**+TDRSLP99UH070XV36B*17.013.07.810,400218457561
      CK40HT-24B-**+TDRSL297UH060NV36B*17.013.07.810,400218457560
      CK40HT-24B-**+TDRSL280UH090V36B*17.013.57.810,300218457559
      CK40HT-24B-**+TDRML193UH070XE36B*17.013.07.810,500218457556
      CK40HT-24B-**+TDRML180UH090V48B*17.013.07.810,500218457555
      CK40HT-24B-**+TDRML180UH070XE36B*17.013.07.810,300218457554
      CK40HT-24B-**+TDRML180UH070V36B*17.013.57.810,300218457553
      CK40HT-24B-**+TDREL280UH090E36B*17.013.07.810,500218457552
      CK40DT-30/36C-**+TDRSLP99DF090XV36C*17.013.07.810,000218457547
      CK40DT-30/36B-**+TDRSL280DF070V36A*17.013.07.810,200218457546
      CK40DT-30/36B-**+TDREL297DF070XV48B*17.012.57.810,400218457545
      CK40DT-30/36B-**+TDRSLP99DF070XV36B*17.013.07.810,100218457544
      CK40DT-30/36B-**+TDRSL280DF090V48B*17.012.57.810,400218457542
      CK40DT-30/36B-**+TDRSL280DF060NV36B*17.013.07.810,200218457541
      CK40DT-30/36B-**+TDRML196DF045XE36B*17.013.07.810,300218457539
      CK40DT-30/36B-**+TDRML193DF070XE36B*17.013.07.810,300218457538
      CK40DT-30/36B-**+TDRML193DF045XE36B*17.013.07.810,300218457537
      CK40DT-30/36B-**+TDRML180DF070E36B*17.013.07.810,200218457536
      CK40HT-24B-**+TDRML297UH045XV36B*17.013.07.810,500218690663
      CBK48MVT-030-230--16.512.58.210,700218457575
      CBK47UHET-030-230--16.512.58.210,700218457548
      CBK48MVT-036-230--16.512.58.110,500218457576
      CBK47UHET-018-230--16.512.58.110,700218457523
      CK40DT-24B-**+TDREL297DF070XE48B*16.512.58.011,000218457585
      CK40DT-24B-**+TDRML180DF070E36B*16.513.08.010,800218457584
      CK40DT-24B-**+TDRSL280DF060NV36B*16.513.08.010,900218457582
      CK40DT-24B-**+TDRML196DF070XE48B*16.512.58.011,100218457581
      CBK47UHET-024-230--16.512.88.011,000218457518
      CK40DT-24B-**+TDRML296DF045XV36B*16.512.57.810,900218457578
      CK40HT-24B-**+TDREL297UH045XE36B*16.512.57.810,600218457572
      CK40HT-24B-**+TDREL297UH070XE36B*16.512.57.810,600218457571
      CK40HT-24B-**+TDREL196UH070XE36B*16.513.07.810,500218457562
      CK40HT-24B-**+TDRML196UH070XE36B*16.513.07.810,500218457558
      CK40HT-24B-**+TDRML196UH045XE36B*16.513.07.810,500218457557
      CK40HT-24B-**+TDREL196UH045XE36B*16.512.57.810,600218457551
      CK40HT-24B-**+TDREL195UH060NE36B*16.512.57.810,500218457550
      CK40HT-24B-**+TDREL195UH040NE36B*16.512.57.810,500218457549
      CK40DT-30/36B-**+TDRML196DF070XE48B*16.512.57.810,400218457540
      CK40DT-30/36B-**+TDREL297DF070XE48B*16.512.57.810,400218457535
      CBK47UHET-036-230--16.012.08.111,000218457577
      CK40HT-30A-**+TDREL180UH040NE36A*16.012.07.810,200218457590
      Yearly running cost in 10 large cities$644-$1,713

      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 ML16KP2-024-230A?
      The Lennox ML16KP2-024-230A is rated at up to 17.5 SEER2 and 13.0 EER2 for cooling and up to 8.2 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 71 certified matchups SEER2 ranges from 16.0-17.5.
      Is the Lennox ML16KP2-024-230A good for cold climates?
      It is not cold-climate certified: none of its matchups meet the ENERGY STAR cold-climate criteria (a COP of at least 1.75 at 5°F among other limits). In places with frequent sub-zero nights, pick a cold-climate 2-ton model.
      How much does the Lennox ML16KP2-024-230A cost to run per year?
      At its rated efficiency it costs about $644-$1,713 a year in electricity in large U.S. cities, depending on climate and local rates - for example $793 in Phoenix and $1,430 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 ML16KP2-024-230A?
      ENERGY STAR lists 71 certified combinations for this outdoor unit. The highest-rated ones use CK40DT-30/36B-**+TDR, CK40DT-24B-**+TDR, CBK48MVT-018/024-230-.
      What refrigerant does the Lennox ML16KP2-024-230A 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 $786/yrYou save $422/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 ML16KP2-024-230A
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $786
      Current system, per year
      $1,208
      You save per year
      $422
      Payback
      21.3 years
      Net after 10 years
      -$4,779

      Cooling $483Heating $303Electricity used: 4,912 kWhSaved vs. a minimum-efficiency heat pump: $136

      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 August 20, 2026. How we use the data.