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      6,000 BTU mini-split heat pump · 4PAM Series

      PerfectAire 4PAMSHH06-SZO

      Very good cooling efficiency and excellent heating efficiency for a 6,000 BTU mini-split heat pump, and certified for cold climates.

      Ranks #32 of 42 6,000 BTU mini-splits for cooling efficiency, and costs about $126 a year to run in a mixed climate like Atlanta.

      SEER2
      25.3 Cooling efficiency over a season
      Very good · beats 86%
      HSPF2
      14.6 Heating efficiency over a season
      Excellent · beats 99%
      EER2
      16.0 Cooling efficiency on a 95°F day
      Excellent · beats 96%
      Heat at 5°F
      7,500 BTU/h107% of its 47°F output
      Very good · beats 86%

      A good fit if…

      • You want low cooling bills - its SEER2 beats 86% of mini-splits.
      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 7,500 BTU/h at 5°F.
      • It will heat most of the year - its HSPF2 beats 99% 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

      Specifications6,000 BTU, R-454B
      General
      BrandPerfectAire
      Outdoor unit model4PAMSHH06-SZO
      Series4PAM Series
      TypeMini-split heat pump
      Nominal size6,000 BTU
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-454B
      Connected (smart) capableNo
      On the market sinceApril 8, 2025
      Last certifiedMay 28, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better25.3 (range 25.3)
      EER2Efficiency at 95°F outdoors16.0
      Cooling capacity6,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better14.6
      Capacity at 47°F7,000 BTU/h
      Capacity at 17°F8,000 BTU/h
      Capacity at 5°F7,500 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater2.30
      ENERGY STAR cold climateYes
      Heating output as it gets colder107% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with 4PAMSHH06-UVW 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.
      4PAMSHH06-UVW PERFECTAIRE · cold climate25.316.014.67,500217221802
      Yearly running cost in 10 large cities$112-$302

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

      Questions5
      What is the SEER2 rating of the PerfectAire 4PAMSHH06-SZO?
      The PerfectAire 4PAMSHH06-SZO is rated at up to 25.3 SEER2 and 16.0 EER2 for cooling and up to 14.6 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
      Is the PerfectAire 4PAMSHH06-SZO good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 7,500 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 PerfectAire 4PAMSHH06-SZO cost to run per year?
      At its rated efficiency it costs about $112-$302 a year in electricity in large U.S. cities, depending on climate and local rates - for example $138 in Phoenix and $253 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 PerfectAire 4PAMSHH06-SZO?
      ENERGY STAR lists 1 certified combination for this outdoor unit. The highest-rated one uses PERFECTAIRE 4PAMSHH06-UVW.
      What refrigerant does the PerfectAire 4PAMSHH06-SZO 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 $137/yrYou save $189/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 PerfectAire 4PAMSHH06-SZO
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $137
      Current system, per year
      $326
      You save per year
      $189
      Payback
      13.3 years
      Net after 10 years
      -$614

      Cooling $83Heating $54Electricity used: 857 kWhSaved vs. a minimum-efficiency heat pump: $115

      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 6,000 BTU models

      See all 42 6,000 BTU mini-splits, ranked

      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of May 28, 2026. How we use the data.