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      1.5-ton central heat pump · SEV Series

      Innovair SEV18H2R19

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

      Ranks #87 of 170 1.5 ton central heat pumps for cooling efficiency, and costs about $561 a year to run in a mixed climate like Atlanta.

      SEER2
      16.5 Cooling efficiency over a season
      Average · beats 40%
      HSPF2
      8.6 Heating efficiency over a season
      Average · beats 45%
      EER2
      11.3 Cooling efficiency on a 95°F day
      Below average · beats 29%
      Heat at 5°F
      11,000 BTU/h61% of its 47°F output
      Below average · beats 26%

      A good fit if…

      • You want steady temperatures and quiet running - the compressor varies its speed.

      Think twice if…

      • You often see nights below 0°F - it is not cold-climate certified.
      • 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
      BrandInnovair
      Also sold asAC Pro, Multi MFG
      Outdoor unit modelSEV18H2R19
      SeriesSEV Series
      TypeCentral heat pump
      Nominal size1.5 ton
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-410A
      Connected (smart) capableNo
      On the market sinceSeptember 18, 2024
      Last certifiedApril 22, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better16.5 (range 16.5)
      EER2Efficiency at 95°F outdoors11.3
      Cooling capacity18,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better8.6
      Capacity at 47°F18,000 BTU/h
      Capacity at 17°F11,500 BTU/h
      Capacity at 5°F11,000 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.93
      ENERGY STAR cold climateNo
      Heating output as it gets colder61% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with FEV18H2R19 at the standard test temperatures, in BTU/h:

      Certified matchups1 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.
      FEV18H2R1916.511.38.611,000213804885
      Same unit, other model numbers3

      These model numbers have exactly the same certified ratings and matchups as the Innovair SEV18H2R19: the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

      Yearly running cost in 10 large cities$512-$1,331

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

      Questions6
      What is the SEER2 rating of the Innovair SEV18H2R19?
      The Innovair SEV18H2R19 is rated at up to 16.5 SEER2 and 11.3 EER2 for cooling and up to 8.6 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
      Is the Innovair SEV18H2R19 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 Innovair SEV18H2R19 cost to run per year?
      At its rated efficiency it costs about $512-$1,331 a year in electricity in large U.S. cities, depending on climate and local rates - for example $626 in Phoenix and $1,108 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
      Is the Innovair SEV18H2R19 the same as the AC Pro AOX330-18HFN1-MR0?
      Yes, as far as the certified ratings go. ENERGY STAR lists 4 model numbers with identical efficiency, capacity and matchups, which means the same outdoor unit sold under a different brand or with a minor variant code (voltage, colour or region). The full list is on this page.
      Which indoor units work with the Innovair SEV18H2R19?
      ENERGY STAR lists 1 certified combination for this outdoor unit. The highest-rated one uses FEV18H2R19.
      What refrigerant does the Innovair SEV18H2R19 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 $618/yrYou save $310/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 Innovair SEV18H2R19
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $618
      Current system, per year
      $928
      You save per year
      $310
      Payback
      22.6 years
      Net after 10 years
      -$3,903

      Cooling $384Heating $234Electricity used: 3,865 kWhSaved vs. a minimum-efficiency heat pump: $93

      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 April 22, 2026. How we use the data.