ASHRAE Standard 90.1 includes minimum efficiency requirements for equipment, including 3-phase CACs and HPs. HSPF is the heat output (in Btu) over the heating season divided by total energy consumption (in watt-hours).ĪSHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers) Standard 90.1 is a commercial building energy code which all states must meet or exceed. ![]() SEER is the cooling output (in Btu) during a typical cooling season divided by total energy consumption (in watt- hours) during the same period. These standards took effect on June 16, 2008. The Energy Independence and Security Act (EISA) of 2007 required an increase in the cooling efficiency of 3-phase CACs and HPs (<65,000 Btu/hr) to 13 SEER (seasonal energy efficiency ratio) and an increase in the heating efficiency of 3-phase HPs to 7.7 HSPF (heating seasonal performance factor). Commercial 3-phase CACs and HPs can either be "single package" systems, where the evaporator coil and the condensing unit are combined into a single physical unit, or "split systems," where the condensing unit is typically placed outdoors while the evaporator is indoors. ![]() Power supplied to residential buildings is almost always single phase, while most commercial buildings are wired with 3-phase power. ![]() Commercial central air conditioners (CACs) and heat pumps (HPs) (<65,000 Btu/hr) are nearly identical to typical residential CACs and HPs, but are designed to operate on 3-phase electric current rather than single-phase power.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |