Defining Energy Use

摘要

In the table on trends in the story on sustainable buildings, "Energy Performance Data Largely Lacking," residential energy consumption should be calculated in millions of Btu per household per year, and not kBtu (thousands of Btu) per household per year (ENR 11/12 p. 10). It is more definitive to look at the year of construction and then the energy consumption in Btu per sq ft per year.