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      1.5-ton central heat pump · MHP17L Series

      MRCOOL MHP17L18P-**A

      Below average cooling and heating efficiency for a 1.5-ton central heat pump, but not rated for cold climates.

      Ranks #97 of 170 1.5 ton central heat pumps for cooling efficiency, and costs about $570 a year to run in a mixed climate like Atlanta.

      SEER2
      16.4 Cooling efficiency over a season
      Below average · beats 38%
      HSPF2
      8.4 Heating efficiency over a season
      Below average · beats 31%
      EER2
      13.5 Cooling efficiency on a 95°F day
      Excellent · beats 95%
      Heat at 5°F
      9,300 BTU/h48% of its 47°F output
      Average · beats 58%

      A good fit if…

      • You want a certified 1.5-ton central heat pump at a typical efficiency level.

      Think twice if…

      • You often see nights below 0°F - it is not cold-climate certified.
      • Cooling cost matters most - its SEER2 is below average for central heat pumps.
      • You mainly need heat - its HSPF2 is below average for central heat pumps.
      • You want the newest refrigerant - it uses R-410A, which is being phased down.

      Calculate my running cost

      Details

      Specifications1.5 ton, R-410A
      General
      BrandMRCOOL
      Outdoor unit modelMHP17L18P-**A
      SeriesMHP17L Series
      TypeCentral heat pump
      Nominal size1.5 ton
      CompressorVariable-speed units run longer at low powerSingle stage
      RefrigerantR-410A
      Connected (smart) capableNo
      On the market sinceAugust 25, 2023
      Last certifiedOctober 27, 2025
      Cooling
      SEER2Seasonal efficiency, higher is better16.4 (range 16.0-16.4)
      EER2Efficiency at 95°F outdoors13.5
      Cooling capacity18,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better8.3-8.4
      Capacity at 47°F18,000 BTU/h
      Capacity at 17°F11,400-11,800 BTU/h
      Capacity at 5°F8,700-9,300 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater2.06-2.10
      ENERGY STAR cold climateNo
      Heating output as it gets colder48% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with MCDP3036BNPB+TDR at the standard test temperatures, in BTU/h:

      Certified matchups4 indoor units

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

      Indoor unitFurnaceSEER2EER2HSPF2Heat @5°FAHRI ref.
      MCDP3036BNPB+TDRMGD96SE045B3XA16.413.58.38,700213265530
      MCDP3036BNPB+TDRMGD96SE070B4XA16.213.58.49,000213265531
      MCDP3036CNPB+TDRMGD96SE090C4XA16.013.58.49,300213265532
      MCDP3036BNPB+TDRMGD80SE070B3A16.013.58.38,700213265529
      Yearly running cost in 10 large cities$515-$1,358

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

      Questions5
      What is the SEER2 rating of the MRCOOL MHP17L18P-**A?
      The MRCOOL MHP17L18P-**A is rated at up to 16.4 SEER2 and 13.5 EER2 for cooling and up to 8.4 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 4 certified matchups SEER2 ranges from 16.0-16.4.
      Is the MRCOOL MHP17L18P-**A 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 1.5-ton model.
      How much does the MRCOOL MHP17L18P-**A cost to run per year?
      At its rated efficiency it costs about $515-$1,358 a year in electricity in large U.S. cities, depending on climate and local rates - for example $633 in Phoenix and $1,133 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 MRCOOL MHP17L18P-**A?
      ENERGY STAR lists 4 certified combinations for this outdoor unit. The highest-rated ones use MCDP3036BNPB+TDR, MCDP3036CNPB+TDR.
      What refrigerant does the MRCOOL MHP17L18P-**A 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 $626/yrYou save $302/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 MRCOOL MHP17L18P-**A
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $626
      Current system, per year
      $928
      You save per year
      $302
      Payback
      23.2 years
      Net after 10 years
      -$3,982

      Cooling $386Heating $240Electricity used: 3,915 kWhSaved vs. a minimum-efficiency heat pump: $86

      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 1.5 ton models

      See all 170 1.5 ton central heat pumps, ranked

      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of October 27, 2025. How we use the data.