HVAC Rated
    Menu

      1.5-ton central heat pump · CLASSIC PLUS

      Rheem RP15AZ18AJ2N

      Below average cooling and heating efficiency for a 1.5-ton central heat pump, and certified for cold climates.

      Ranks #112 of 170 1.5 ton central heat pumps for cooling efficiency, and costs about $559 a year to run in a mixed climate like Atlanta.

      SEER2
      16.0 Cooling efficiency over a season
      Below average · beats 26%
      HSPF2
      8.1 Heating efficiency over a season
      Below average · beats 20%
      EER2
      11.7 Cooling efficiency on a 95°F day
      Average · beats 43%
      Heat at 5°F
      12,300 BTU/h54% of its 47°F output
      Very good · beats 88%

      A good fit if…

      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 12,300 BTU/h at 5°F.
      • You want a choice of indoor units - 36 certified pairings.

      Think twice if…

      • 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
      BrandRheem
      Also sold asRuud
      Outdoor unit modelRP15AZ18AJ2N
      SeriesCLASSIC PLUS
      TypeCentral heat pump
      Nominal size1.5 ton
      CompressorVariable-speed units run longer at low powerTwo-stage
      RefrigerantR-410A
      Connected (smart) capableNo
      On the market sinceFebruary 24, 2023
      Last certifiedJuly 7, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better16.0 (range 15.2-16.0)
      EER2Efficiency at 95°F outdoors11.7
      Cooling capacity17,100-22,800 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better7.8-8.1
      Capacity at 47°F17,100-22,600 BTU/h
      Capacity at 17°F11,000-15,600 BTU/h
      Capacity at 5°F8,100-12,300 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.90-2.30
      ENERGY STAR cold climateYes
      Heating output as it gets colder54% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with RH2VZ2417STANN at the standard test temperatures, in BTU/h:

      Certified matchups36 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.
      RH2VZ2417STANN · cold climate-16.011.78.19,200212381129
      RH2VZ2417STANN · cold climate-16.011.78.19,200212381128
      RH3VZ2417STACN-16.011.77.88,100214664591
      RH3VZ2417STACN-16.011.77.88,100214664587
      RCFZ2417STANMR96VA0702317M15.211.78.1-212387110
      RCFZ2417STANM · cold climateR962V0703A17M4S15.211.78.19,300212387099
      RCFZ2417STANM · cold climateR962V0703A17M4S15.211.78.19,300212387100
      RCFZ2417STANM · cold climateR951V0603A17UHU15.211.78.19,500212941548
      RCFZ2417STANM · cold climateR951V0603A17UHU15.211.78.19,500212941528
      RH2TZ2417STANN-15.211.77.88,200211627502
      RH2TZ2417STANN-15.211.77.89,200211627515
      RCFZ2417STANMR97VA070M317K15.211.77.8-212387293
      RCFZ2417STANMU98MV0703A17UPS15.211.77.89,100212387294
      RCFZ2417STANMR951V0403A17UHU15.211.77.89,500212387193
      RCFZ2417STANMR951V0403A17M4S15.211.77.89,300212387190
      RCFZ2417STANMR951V0603A17M4S15.211.77.89,400212387173
      RCFZ2417STANMR951V0403A17UHU15.211.77.89,500212387188
      RCFZ2417STANMR951V0403A17M4S15.211.77.89,300212387174
      RCFZ2417STANMR951V0603A17M4S15.211.77.89,400212387172
      RCFZ2417STANMR98MV0603A17UPS15.211.77.88,800212387292
      RCFZ2417STANMR951V0703A17M4S15.211.77.89,400212941552
      RCFZ2417STANMR951V0703A17M4S15.211.77.89,400212941549
      RCFZ2417STANMU97MV0703A17DHS15.211.77.89,000212387317
      RCFZ2417STANMR97MV0603A17DHS15.211.77.89,000212387307
      RCFZ2417STANMU97MV0603A17DHS15.211.77.89,000212387310
      RCFZ2417STANMR98MV0703A17UPS15.211.77.89,100212387289
      RCFZ2417STANMU98MV0603A17UPS15.211.77.88,800212387309
      RCFZ2417STANMR97MV0703A17DHS15.211.77.89,000212387303
      RCFZ2417STANMR962V0603A17M4S15.211.77.89,400212387244
      RCFZ2417STANMR962V0603A17M4S15.211.77.89,400212387245
      RCFZ2417STANMR962V0403A17M4S15.211.77.89,300212387239
      RCFZ2417STANMR962V0403A17M4S15.211.77.89,300212387237
      RF2TZ2421STANS-15.211.77.88,400213082125
      RF2TZ2421STANS-15.211.77.88,400213082128
      WH2TZ2417STANN-15.211.77.812,300215712291
      WH2TZ2417STANN-15.211.77.812,300215759186
      Yearly running cost in 10 large cities$502-$1,335

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

      Questions5
      What is the SEER2 rating of the Rheem RP15AZ18AJ2N?
      The Rheem RP15AZ18AJ2N is rated at up to 16.0 SEER2 and 11.7 EER2 for cooling and up to 8.1 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 36 certified matchups SEER2 ranges from 15.2-16.0.
      Is the Rheem RP15AZ18AJ2N good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 12,300 BTU/h at 5°F with a COP of 2.30, so it is still 2.3 times as efficient as electric resistance heat at that temperature.
      How much does the Rheem RP15AZ18AJ2N cost to run per year?
      At its rated efficiency it costs about $502-$1,335 a year in electricity in large U.S. cities, depending on climate and local rates - for example $618 in Phoenix and $1,115 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 Rheem RP15AZ18AJ2N?
      ENERGY STAR lists 36 certified combinations for this outdoor unit. The highest-rated ones use RH2VZ2417STANN, RH3VZ2417STACN, RCFZ2417STANM.
      What refrigerant does the Rheem RP15AZ18AJ2N 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 $613/yrYou save $269/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 Rheem RP15AZ18AJ2N
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $613
      Current system, per year
      $882
      You save per year
      $269
      Payback
      24.2 years
      Net after 10 years
      -$3,809

      Cooling $376Heating $236Electricity used: 3,829 kWhSaved vs. a minimum-efficiency heat pump: $64

      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 July 7, 2026. How we use the data.