This weekend I have been gathering data regarding LEED certified buildings made available at the Green Building Information Gateway. In browsing through the web site I ran across a page that described Top Performing Buildings. On that page I read this statement:
“One percent of buildings earned an Energy Star Score of 90+”
I don’t know if this statement is true or not — but I am humored by its implications.
According to the EPA, the building Energy Star score is a ranking of a building’s energy efficiency as compared with similar buildings in the U.S. commercial building stock. It is assumed that the mean or median building score is 50 — simply reflecting the inescapable fact that half U.S. buildings are better than average and half are worse. This is a necessary consequence of the meaning of a cumulative population distribution!
It also follows that 10% of the buildings necessarily have scores below 11 and 10% have scores higher than 90.
Perhaps it is true that only 1% receive scores that are 90 and higher. But if true, the score clearly cannot reflect the meaning given it by the EPA. Perhaps the author of that gbig web page needs to reflect on the meaning his/her/their statement.