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      12,000 BTU mini-split heat pump · CH series

      C&H CH-ES12-115VO

      Average cooling and heating efficiency for a 12,000 BTU mini-split heat pump, but not rated for cold climates.

      Ranks #270 of 394 12,000 BTU mini-splits for cooling efficiency, and costs about $295 a year to run in a mixed climate like Atlanta.

      SEER2
      22.7 Cooling efficiency over a season
      Average · beats 57%
      HSPF2
      10.4 Heating efficiency over a season
      Average · beats 57%
      EER2
      12.5 Cooling efficiency on a 95°F day
      Average · beats 44%
      Heat at 5°F
      6,700 BTU/h56% of its 47°F output
      Average · beats 61%

      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

      Specifications12,000 BTU, R-410A
      General
      BrandC&H
      Also sold asCooper&Hunter
      Outdoor unit modelCH-ES12-115VO
      SeriesCH series
      TypeMini-split heat pump
      Nominal size12,000 BTU
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-410A
      Connected (smart) capableNo
      On the market sinceJanuary 1, 2022
      Last certifiedMarch 4, 2025
      Cooling
      SEER2Seasonal efficiency, higher is better22.7 (range 22.7)
      EER2Efficiency at 95°F outdoors12.5
      Cooling capacity12,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better10.4
      Capacity at 47°F12,000 BTU/h
      Capacity at 17°F8,900 BTU/h
      Capacity at 5°F6,700 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater2.06
      ENERGY STAR cold climateNo
      Heating output as it gets colder56% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with CH-B12OLVWM-115VI at the standard test temperatures, in BTU/h:

      Certified matchups4 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.
      CH-B12OLVWM-115VI22.712.510.46,700210665986
      CH-12OLVWM-115VI22.712.510.46,700207740531
      CH-12OLVWM-115VI Cooper&Hunter22.712.510.46,700210799578
      CH-B12OLVWM-115VI Cooper&Hunter22.712.510.46,700210799685
      Yearly running cost in 10 large cities$249-$716

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

      Questions5
      What is the SEER2 rating of the C&H CH-ES12-115VO?
      The C&H CH-ES12-115VO is rated at up to 22.7 SEER2 and 12.5 EER2 for cooling and up to 10.4 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
      Is the C&H CH-ES12-115VO 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 12,000 BTU model.
      How much does the C&H CH-ES12-115VO cost to run per year?
      At its rated efficiency it costs about $249-$716 a year in electricity in large U.S. cities, depending on climate and local rates - for example $314 in Phoenix and $604 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 C&H CH-ES12-115VO?
      ENERGY STAR lists 4 certified combinations for this outdoor unit. The highest-rated ones use CH-B12OLVWM-115VI, CH-12OLVWM-115VI, Cooper&Hunter CH-12OLVWM-115VI.
      What refrigerant does the C&H CH-ES12-115VO 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 $315/yrYou save $303/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 C&H CH-ES12-115VO
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $315
      Current system, per year
      $619
      You save per year
      $303
      Payback
      14.8 years
      Net after 10 years
      -$1,466

      Cooling $186Heating $129Electricity used: 1,971 kWhSaved vs. a minimum-efficiency heat pump: $159

      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 March 4, 2025. How we use the data.