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      2-ton central heat pump · CLASSIC PLUS/ACHIEVER PLUS

      Thermal Zone TZPLAD1524AJN

      Below average cooling and heating efficiency for a 2-ton central heat pump, and certified for cold climates.

      Ranks #297 of 331 2 ton central heat pumps for cooling efficiency, and costs about $746 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
      12,600 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 12,600 BTU/h at 5°F.

      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

      Specifications2 ton, R-410A
      General
      BrandThermal Zone
      Outdoor unit modelTZPLAD1524AJN
      SeriesCLASSIC PLUS/ACHIEVER PLUS
      TypeCentral heat pump
      Nominal size2 ton
      CompressorVariable-speed units run longer at low powerTwo-stage
      RefrigerantR-410A
      Connected (smart) capableNo
      On the market sinceFebruary 8, 2023
      Last certifiedJune 3, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better16.0 (range 15.2-16.0)
      EER2Efficiency at 95°F outdoors11.7
      Cooling capacity22,800 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better7.8-8.1
      Capacity at 47°F22,600-22,800 BTU/h
      Capacity at 17°F15,600-15,900 BTU/h
      Capacity at 5°F11,800-12,600 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater2.20-2.30
      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 TZHDLVST2417*NAN at the standard test temperatures, in BTU/h:

      Certified matchups7 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.
      TZHDLVST2417*NAN · cold climate-16.011.78.112,300212508012
      TCFZ2417STANM · cold climateTZ96M42V070B3SA15.211.78.112,500212507995
      TCFZ2417STANM · cold climateTZ95M41V060B3SA15.211.78.112,600212507986
      TCFZ2417STANM · cold climateTZ95M41V040B3SA15.211.78.112,600212507983
      TCFZ2417STANM · cold climateTZ96M42V040B3SA15.211.78.112,600212507990
      TCFZ2417STANM · cold climateTZ96M42V060B3SA15.211.78.112,600212507992
      TZHDLTST2417*NAN-15.211.77.811,800211306306
      Yearly running cost in 10 large cities$669-$1,780

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

      Questions5
      What is the SEER2 rating of the Thermal Zone TZPLAD1524AJN?
      The Thermal Zone TZPLAD1524AJN 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 7 certified matchups SEER2 ranges from 15.2-16.0.
      Is the Thermal Zone TZPLAD1524AJN good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 12,600 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 Thermal Zone TZPLAD1524AJN cost to run per year?
      At its rated efficiency it costs about $669-$1,780 a year in electricity in large U.S. cities, depending on climate and local rates - for example $824 in Phoenix and $1,486 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 Thermal Zone TZPLAD1524AJN?
      ENERGY STAR lists 7 certified combinations for this outdoor unit. The highest-rated ones use TZHDLVST2417*NAN, TCFZ2417STANM, TZHDLTST2417*NAN.
      What refrigerant does the Thermal Zone TZPLAD1524AJN 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 $817/yrYou save $359/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 Thermal Zone TZPLAD1524AJN
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $817
      Current system, per year
      $1,176
      You save per year
      $359
      Payback
      23.7 years
      Net after 10 years
      -$4,912

      Cooling $502Heating $315Electricity used: 5,105 kWhSaved vs. a minimum-efficiency heat pump: $85

      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 June 3, 2026. How we use the data.