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Personal: Residential

Energy Star Most Efficient

Eligibility for Recognition – Central Air Conditioners and Heat Pumps

Scope

Included products: Residential central air conditioners and heat pumps (as defined below) are eligible for Most Efficient recognition in 2011.

Air-Source Heat Pump (ASHP): An air-source unitary heat pump model consists of one or more factory-made assemblies which normally include an indoor conditioning coil(s), compressor(s), and outdoor coil(s), including means to provide a heating function. ASHPs shall provide the function of air heating with controlled temperature, and may include the functions of air-cooling, air-circulation, air-cleaning, dehumidifying or humidifying.

Central Air Conditioner: A central air conditioner model consists of one or more factory-made assemblies which normally include an evaporator or cooling coil(s), compressor(s), and condenser(s). Central air conditioners provide the function of air-cooling, and may include the functions of air-circulation, air-cleaning, dehumidifying or humidifying.

Geothermal Heat Pump: A geothermal heat pump (GHP) uses the thermal energy of the ground or groundwater to provide residential space conditioning and/or domestic water heating. A geothermal heat pump model normally consists of one or more factory-made assemblies that include indoor conditioning and/or domestic water heat exchanger(s), compressors, and a ground-side heat exchanger. A geothermal heat pump model may provide space heating, space cooling, domestic water heating, or a combination of these functions and may also include the functions of liquid circulation, thermal storage, air circulation, air cleaning, dehumidifying or humidifying. A geothermal heat pump system generally consists of one or more geothermal heat pump models, the ground heat exchanger(s), the air and/or hydronic space conditioning distribution system(s), temperature controls, and thermal storage tanks.

Excluded products: The following products are not eligible for Most Efficient recognition in 2011:

  • Units that run on three-phase power.
  • Central Air Conditioning or Air Source Heat Pump Units rated for more than 65,000 Btu/hr of cooling. This limit does not apply to Geothermal Heat Pumps.
Recognition Criteria
  1. Product must be ENERGY STAR qualified consistent with applicable ENERGY STAR Partner Commitments and the requirements set forth in the ENERGY STAR Program Requirements. Product performance must be certified by an EPA-recognized Certification Body.

  2. Products must meet the following cooling and heating performance levels:

    Product type SEER EER HSPF COP
    Split AC 18 12.5    
    Split HP 18 12.5 9.6  
    Packaged AC 16 12    
    Packaged HP 16 12 8  
    Closed Loop Water-to-Air GHP   17.1   3.6
    Open Loop Water-to-Air GHP   21.1   4.1
    Closed Loop Water-to-Water GHP   16.1   3.1
    Open Loop Water-to-Water GHP   20.1   3.5
    DGX   16.0   3.6

  3. Central AC, air source heat pumps and ground source heat pumps must have communications, diagnostic and automated configuration capability as defined below.

    System Controller: A thermostat or other control device with a user interface, which can be located in conditioned space. It is strongly recommended, but not required, that the controller have access to outside temperature data and that it translate all diagnostic and service messages into plain text.

    Communications: Units shall be able to participate in two way communications with at least one system controller model that is available for sale.

    Diagnostics: Units shall be able to transmit any fault codes which indicate a need for technician service to at least one system controller model that is available for sale. With this information, the control device is able to advise homeowners to call their service personnel.

    Automated configuration: Units shall be able to send and receive information at least one system controller model that is available for sale to automatically configure settings appropriate to the controlled equipment, such as airflow for heating and cooling. This may include prompting an installer through configuration of HVAC system settings and desired comfort settings, and a test sequence at turn-on.

Recognition Period

Upon notification from an ENERGY STAR Partner, EPA will add qualifying models to the 2011 Most Efficient product list for televisions from May 5, 2011 through December 31, 2011. The 2011 Most Efficient designation may be used in association with models recognized during this period for as long as the model remains on the market.