An air-source unitary heat pump model is made up of one or more factory-built assemblies that typically contain indoor compressors, conditioning coils, and outside coils, as well as heating components. Air heating with a controlled temperature must be provided by ASHPs, which may also include air cooling, air movement, air cleaning, dehumidification, and humidification.
One or more factory-made assemblies, such as an evaporator or cooling coil(s), compressor(s), and condenser, make up a central air conditioner model (s). Central air conditioners provide cooling as well as other tasks such as air movement, air cleansing, dehumidification, and humidification.
This is the energy efficiency of a heat pump over a single heating season. It compares the total heating output (including additional electric heat) of a heat pump (in Btu) to the total power consumed (in watt-hours) during the usual heating season. The HSPF is calculated using results from tests conducted in accordance with ARI 210/2401.
During the cooling season, this is a measure of equipment energy efficiency. It compares the total cooling capacity of a central air conditioner or heat pump (in Btu) to the total electric energy input (in watt-hours) consumed during the regular cooling season. SEER is based on tests that were conducted in line with the ARI 210/2401 standard.
This is a measurement of the cooling equipment’s immediate energy efficiency. EER is calculated by dividing the steady-state rate of heat energy removal (e.g., cooling capacity) by the steady-state rate of energy input to the equipment in watts. Btuh per watt (Btuh/watt) is the unit of measurement for this ratio. EER is calculated using results from tests conducted in compliance with ARI 210/2401.