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      3-ton central heat pump · MHAH Series

      EMI MHSD136DACFC

      Below average cooling efficiency and very good heating efficiency for a 3-ton central heat pump, and certified for cold climates.

      Ranks #224 of 302 3 ton central heat pumps for cooling efficiency, and costs about $1,075 a year to run in a mixed climate like Atlanta.

      SEER2
      16.0 Cooling efficiency over a season
      Below average · beats 26%
      HSPF2
      10.0 Heating efficiency over a season
      Very good · beats 84%
      EER2
      10.0 Cooling efficiency on a 95°F day
      Below average · beats 10%
      Heat at 5°F
      34,400 BTU/h86% of its 47°F output
      Below average · beats 39%

      A good fit if…

      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 34,400 BTU/h at 5°F.
      • It will heat most of the year - its HSPF2 beats 84% of central heat pumps.
      • You want steady temperatures and quiet running - the compressor varies its speed.

      Think twice if…

      • Cooling cost matters most - its SEER2 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

      Specifications3 ton, R-410A
      General
      BrandEMI
      Also sold asCONFORTO
      Outdoor unit modelMHSD136DACFC
      SeriesMHAH Series
      TypeCentral heat pump
      Nominal size3 ton
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-410A
      Connected (smart) capableNo
      On the market sinceOctober 18, 2024
      Last certifiedSeptember 1, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better16.0 (range 15.2-16.0)
      EER2Efficiency at 95°F outdoors10.0
      Cooling capacity35,000-36,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better9.5-10.0
      Capacity at 47°F39,000-40,000 BTU/h
      Capacity at 17°F30,400-33,000 BTU/h
      Capacity at 5°F32,000-34,400 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.97-2.00
      ENERGY STAR cold climateYes
      Heating output as it gets colder86% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with MHAH136DACFC at the standard test temperatures, in BTU/h:

      Certified matchups6 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.
      MHAH136DACFC · cold climate16.010.09.534,400216372810
      MHAH136DACFC · cold climate16.010.09.534,400216683751
      MHCO37DACFC · cold climate15.210.010.032,000218631475
      MHCO37DACFC · cold climate15.210.010.032,000218631469
      MHCO36DACFC · cold climate15.210.010.032,000218722003
      MHCO36DACFC · cold climate15.210.010.032,000218722002
      Yearly running cost in 10 large cities$1,024-$2,518

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

      Questions5
      What is the SEER2 rating of the EMI MHSD136DACFC?
      The EMI MHSD136DACFC is rated at up to 16.0 SEER2 and 10.0 EER2 for cooling and up to 10.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 6 certified matchups SEER2 ranges from 15.2-16.0.
      Is the EMI MHSD136DACFC good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 34,400 BTU/h at 5°F with a COP of 2.00, so it is still 2.0 times as efficient as electric resistance heat at that temperature.
      How much does the EMI MHSD136DACFC cost to run per year?
      At its rated efficiency it costs about $1,024-$2,518 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,232 in Phoenix and $2,080 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 EMI MHSD136DACFC?
      ENERGY STAR lists 6 certified combinations for this outdoor unit. The highest-rated ones use MHAH136DACFC, MHCO37DACFC, MHCO36DACFC.
      What refrigerant does the EMI MHSD136DACFC 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 $1,207/yrYou save $663/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 EMI MHSD136DACFC
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $1,207
      Current system, per year
      $1,870
      You save per year
      $663
      Payback
      19.6 years
      Net after 10 years
      -$6,367

      Cooling $770Heating $437Electricity used: 7,543 kWhSaved vs. a minimum-efficiency heat pump: $237

      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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      See all 302 3 ton central heat pumps, ranked

      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of September 1, 2026. How we use the data.