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      12,000 BTU mini-split heat pump · Deluxe Z

      Panasonic CS-Z12AKUAW/CU-XZ12AKUAC

      Very good cooling and heating efficiency for a 12,000 BTU mini-split heat pump, and certified for cold climates.

      Ranks #101 of 394 12,000 BTU mini-splits for cooling efficiency, and costs about $260 a year to run in a mixed climate like Atlanta.

      SEER2
      25.0 Cooling efficiency over a season
      Very good · beats 83%
      HSPF2
      11.7 Heating efficiency over a season
      Very good · beats 87%
      EER2
      14.4 Cooling efficiency on a 95°F day
      Very good · beats 86%
      Heat at 5°F
      13,700 BTU/h114% of its 47°F output
      Very good · beats 71%

      A good fit if…

      • You want low cooling bills - its SEER2 beats 83% of mini-splits.
      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 13,700 BTU/h at 5°F.
      • It will heat most of the year - its HSPF2 beats 87% of mini-splits.
      • 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

      Specifications12,000 BTU, R-32
      General
      BrandPanasonic
      Outdoor unit modelCS-Z12AKUAW/CU-XZ12AKUAC
      SeriesDeluxe Z
      TypeMini-split heat pump
      Nominal size12,000 BTU
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-32
      Connected (smart) capableNo
      On the market sinceMay 28, 2024
      Last certifiedMay 23, 2024
      Cooling
      SEER2Seasonal efficiency, higher is better25.0 (range 25.0)
      EER2Efficiency at 95°F outdoors14.4
      Cooling capacity11,500 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better11.7
      Capacity at 47°F12,000 BTU/h
      Capacity at 17°F- BTU/h
      Capacity at 5°F13,700 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater2.11
      ENERGY STAR cold climateYes
      Heating output as it gets colder114% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with CS-Z12AKUAW 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.
      CS-Z12AKUAW · cold climate25.014.411.713,700214837753
      Same unit, other model numbers1

      These model numbers have exactly the same certified ratings and matchups as the Panasonic CS-Z12AKUAW/CU-XZ12AKUAC: 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$217-$634

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

      Questions6
      What is the SEER2 rating of the Panasonic CS-Z12AKUAW/CU-XZ12AKUAC?
      The Panasonic CS-Z12AKUAW/CU-XZ12AKUAC is rated at up to 25.0 SEER2 and 14.4 EER2 for cooling and up to 11.7 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
      Is the Panasonic CS-Z12AKUAW/CU-XZ12AKUAC good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 13,700 BTU/h at 5°F with a COP of 2.11, so it is still 2.1 times as efficient as electric resistance heat at that temperature.
      How much does the Panasonic CS-Z12AKUAW/CU-XZ12AKUAC cost to run per year?
      At its rated efficiency it costs about $217-$634 a year in electricity in large U.S. cities, depending on climate and local rates - for example $275 in Phoenix and $536 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
      Is the Panasonic CS-Z12AKUAW/CU-XZ12AKUAC the same as the Panasonic CS-XZ12AKUAW/CU-XZ12AKUAC?
      Yes, as far as the certified ratings go. ENERGY STAR lists both 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 Panasonic CS-Z12AKUAW/CU-XZ12AKUAC?
      ENERGY STAR lists 1 certified combination for this outdoor unit. The highest-rated one uses CS-Z12AKUAW.
      What refrigerant does the Panasonic CS-Z12AKUAW/CU-XZ12AKUAC use?
      It uses 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 $277/yrYou save $324/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 Panasonic CS-Z12AKUAW/CU-XZ12AKUAC
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $277
      Current system, per year
      $601
      You save per year
      $324
      Payback
      13.9 years
      Net after 10 years
      -$1,256

      Cooling $162Heating $115Electricity used: 1,730 kWhSaved vs. a minimum-efficiency heat pump: $185

      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 May 23, 2024. How we use the data.