Classification of air conditioners
Focal aeration and cooling systems and air-source heat pumps working in the cooling mode have been appraised by regular vitality proficiency proportion (Diviner) since 1992. Soothsayer is the occasional cooling yield in Btu partitioned by the regular vitality contribution to watt-hours for a "normal" U.S. atmosphere. Before 1992, distinct measurements were utilized, yet the execution of numerous more seasoned focal aeration and cooling systems was proportional to Soothsayer appraisals of just 6 or 7. The normal focal aeration and cooling system sold in 1988 had a Soothsayer likeness around 9; by 2002 it had ascended to 11.1.The national productivity standard for focal ventilation systems and air source heat pumps now requires a base Diviner of 13 (since 2006), and to fit the bill for Vitality STAR requires a Diviner of 14.5 or higher. Focal aeration and cooling systems likewise accompany a vitality proficiency proportion (EER) rating, which demonstrates execution at higher temperatures. Vitality STAR-qualified models must meet an EER necessity of 12.
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