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      1.5-ton central heat pump · ECU Series

      ECO-AIR ECUO-18H

      Very good cooling efficiency and excellent heating efficiency for a 1.5-ton central heat pump, and certified for cold climates.

      Ranks #29 of 170 1.5 ton central heat pumps for cooling efficiency, and costs about $497 a year to run in a mixed climate like Atlanta.

      SEER2
      19.0 Cooling efficiency over a season
      Very good · beats 85%
      HSPF2
      10.1 Heating efficiency over a season
      Excellent · beats 90%
      EER2
      12.5 Cooling efficiency on a 95°F day
      Very good · beats 80%
      Heat at 5°F
      19,000 BTU/h95% of its 47°F output
      Average · beats 51%

      A good fit if…

      • You want low cooling bills - its SEER2 beats 85% of central heat pumps.
      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 19,000 BTU/h at 5°F.
      • It will heat most of the year - its HSPF2 beats 90% 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

      Specifications1.5 ton, R-454B
      General
      BrandECO-AIR
      Outdoor unit modelECUO-18H
      SeriesECU Series
      TypeCentral heat pump
      Nominal size1.5 ton
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-454B
      Connected (smart) capableNo
      On the market sinceJanuary 10, 2025
      Last certifiedJuly 25, 2025
      Cooling
      SEER2Seasonal efficiency, higher is better19.0 (range 15.8-19.0)
      EER2Efficiency at 95°F outdoors11.6-12.5
      Cooling capacity18,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better9.5-10.1
      Capacity at 47°F18,000-19,000 BTU/h
      Capacity at 17°F14,000-15,200 BTU/h
      Capacity at 5°F18,000-19,000 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.80-2.06
      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 ECMP-18U at the standard test temperatures, in BTU/h:

      Certified matchups6 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.
      ECMP-18U · cold climate-19.012.59.718,000216759893
      ECCB-24U · cold climateMGV96U060B3C16.311.810.118,000217611274
      ECCB-24U · cold climateMGV96U080B3C16.111.710.018,000217611275
      ECCB-24U · cold climate-16.111.79.518,000216759912
      ECCA-24U · cold climate-16.111.79.518,000216759910
      ECCB-24U · cold climateRG19060B12MPS115.811.610.119,000217611316
      Yearly running cost in 10 large cities$445-$1,189

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

      Questions5
      What is the SEER2 rating of the ECO-AIR ECUO-18H?
      The ECO-AIR ECUO-18H is rated at up to 19.0 SEER2 and 12.5 EER2 for cooling and up to 10.1 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 6 certified matchups SEER2 ranges from 15.8-19.0.
      Is the ECO-AIR ECUO-18H good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 19,000 BTU/h at 5°F with a COP of 2.06, so it is still 2.1 times as efficient as electric resistance heat at that temperature.
      How much does the ECO-AIR ECUO-18H cost to run per year?
      At its rated efficiency it costs about $445-$1,189 a year in electricity in large U.S. cities, depending on climate and local rates - for example $549 in Phoenix and $993 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 ECO-AIR ECUO-18H?
      ENERGY STAR lists 6 certified combinations for this outdoor unit. The highest-rated ones use ECMP-18U, ECCB-24U, ECCA-24U.
      What refrigerant does the ECO-AIR ECUO-18H 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 $544/yrYou save $400/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 ECO-AIR ECUO-18H
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $544
      Current system, per year
      $944
      You save per year
      $400
      Payback
      17.5 years
      Net after 10 years
      -$2,997

      Cooling $333Heating $211Electricity used: 3,401 kWhSaved vs. a minimum-efficiency heat pump: $183

      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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      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of July 25, 2025. How we use the data.