Ekotrope currently supports HSPF2 for air source heat pumps using the conversion factors specified in ANSI/RESNET 301, reproduced for convenience here. HSPF2 - Heating Seasonal Performance Factor 2 is the new standardized measure of heat pump efficiency under new test conditions specified by AHRI 210/240 (2020), which will be in effect by January 1, 2023.If the system is not rated for HSPF, COP 47F can be used along with this table to determine HSPF. In Version 4.0 or later, Ekotrope models the performance of the heat pump at each hour based on standard performance curves from NREL, including backup heat as necessary to satisfy the required heating load. In Versions prior to 4.0, this is accomplished by de-rating the HSPF based on the climate conditions according to this article. Please note that Ekotrope will include backup resistance heat and reduced performance in cold weather automatically. If you are modeling a Dual Fuel Heat Pump, please reference this guide. HSPF - Heating Seasonal Performance Factor is a standardized measure of heat pump efficiency, based on the total heating output of a heat pump, in Btu, divided by the total electric energy input, in watt-hours, under test conditions specified by the Air Conditioning and Refrigeration Institute (AHRI) Standard 210/240.AFUE - Annual Fuel Utilization Efficiency is a standardized measurement of heating system efficiency based on the ratio between annual energy input and output. This unlabeled field, represented by a dropdown menu, specifies the efficiency measurement of the Heating equipment. The following inputs are available only for equipment that serves that conditioning type The selection here will affect which inputs are available. Available options will vary depending on equipment type. This unlabeled field, represented by a number of checkboxes, specifies the type of conditioning (Heating, Cooling and/or Hot Water) that this equipment can provide. Note: Forced Air Hydronic systems should be modeled using the Forced Air option. The method that this component type uses to distribute air, water or another working fluid. The type of fuel used by this component type. Please reference this article when modeling a Shared Boiler with a Water Loop Heat Pump.Please reference this article when modeling a Chiller or Cooling Tower with a Water Loop Heat Pump.Please reference this article when modeling a Dual Fuel Heat Pump.If the labeled efficiency is not available, RESNET has specified that a default value of 30 EER should be used (ANSI/RESNET 301-2014).
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