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      Under 1.5-ton central heat pump · ACIQ Series

      ACIQ ACIQ-12-EHPD

      Excellent cooling efficiency and very good heating efficiency for a under 1.5-ton central heat pump, and certified for cold climates.

      Ranks #3 of 9 Under 1.5 ton central heat pumps for cooling efficiency, and costs about $327 a year to run in a mixed climate like Atlanta.

      SEER2
      21.0 Cooling efficiency over a season
      Excellent · beats 97%
      HSPF2
      10.0 Heating efficiency over a season
      Very good · beats 84%
      EER2
      12.5 Cooling efficiency on a 95°F day
      Very good · beats 80%
      Heat at 5°F
      11,200 BTU/h86% of its 47°F output
      Below average · beats 39%

      A good fit if…

      • You want low cooling bills - its SEER2 beats 97% of central heat pumps.
      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 11,200 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…

      • Nothing stands out - its ratings have no weak spot for its class.

      Calculate my running cost

      Details

      SpecificationsUnder 1.5 ton, R-454B
      General
      BrandACIQ
      Also sold as1HVAC
      Outdoor unit modelACIQ-12-EHPD
      SeriesACIQ Series
      TypeCentral heat pump
      Nominal sizeUnder 1.5 ton
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-454B
      Connected (smart) capableNo
      On the market sinceFebruary 10, 2025
      Last certifiedMarch 13, 2025
      Cooling
      SEER2Seasonal efficiency, higher is better21.0 (range 21.0)
      EER2Efficiency at 95°F outdoors12.5
      Cooling capacity12,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better10.0
      Capacity at 47°F13,000 BTU/h
      Capacity at 17°F12,600 BTU/h
      Capacity at 5°F11,200 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater2.00
      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 ACIQ-12-AHD at the standard test temperatures, in BTU/h:

      Certified matchups2 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.
      ACIQ-12-AHD · cold climate21.012.510.011,200217110156
      ACIQ-12-AHD · cold climate21.012.510.011,200217110157
      Yearly running cost in 10 large cities$270-$801

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

      Questions5
      What is the SEER2 rating of the ACIQ ACIQ-12-EHPD?
      The ACIQ ACIQ-12-EHPD is rated at up to 21.0 SEER2 and 12.5 EER2 for cooling and up to 10.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
      Is the ACIQ ACIQ-12-EHPD good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 11,200 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 ACIQ ACIQ-12-EHPD cost to run per year?
      At its rated efficiency it costs about $270-$801 a year in electricity in large U.S. cities, depending on climate and local rates - for example $344 in Phoenix and $678 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 ACIQ ACIQ-12-EHPD?
      ENERGY STAR lists 2 certified combinations for this outdoor unit. The highest-rated one uses ACIQ-12-AHD.
      What refrigerant does the ACIQ ACIQ-12-EHPD 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 $347/yrYou save $288/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 ACIQ ACIQ-12-EHPD
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $347
      Current system, per year
      $635
      You save per year
      $288
      Payback
      15.6 years
      Net after 10 years
      -$1,616

      Cooling $201Heating $146Electricity used: 2,167 kWhSaved vs. a minimum-efficiency heat pump: $143

      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 Under 1.5 ton models

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      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of March 13, 2025. How we use the data.