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The energy efficiency ratio (EER) of a particular cooling device is the ratio of output cooling energy (in BTUs) to input electrical energy (in watt-hours) at a given operating point. EER is generally calculated using a 95 °F (35 °C) outside temperature and an inside (actually return-air) temperature of 80 °F (27 °C) and 50% relative humidity.
In the United Kingdom, a Seasonal Energy Efficiency ratio (SEER) for refrigeration and air conditioning products, similar to the ESEER but with different load profile weighting factors, is used for part of the Building Regulations Part L calculations within the Simplified Building Energy Model (SBEM) software, and are used in the production of Energy Performance Certificates (EPC) for new ...
To more accurately describe the performance of air conditioning equipment over a typical cooling season a modified version of the EER, the Seasonal Energy Efficiency Ratio (SEER), or in Europe the ESEER, is used. SEER ratings are based on seasonal temperature averages instead of a constant 35 °C (95 °F) outdoor temperature.
HERS—Home energy rating standard (conservation) HHI—Herfindahl–Hirschman Index (markets) HID—high intensity discharge (electricity) hp—Horsepower (measurement) HRSG—Heat recovery steam generation; HTGR—high temperature gas cooled reactor (nuclear) HVAC—Heating, ventilation, and air conditioning (conservation)
packaged terminal air conditioner An air conditioner and heater combined into a single, electrically powered unit, typically installed through a wall and often found in hotels. Abbreviated PTAC. PAG Polyalkylene glycol is a synthetic oil used in A/C systems to lubricate the compressor.
The rating level of buildings is determined in three parameters; Basic Items: refers to the regulated energy use per square meter, obtained by computer modeling or measurements. Required Items: refers to minimum performance requirements for building envelope and Heating Ventilation and Air-Conditioning (HVAC).