Correction: Water Heating

Ren Anderson of the National Renewable Energy Laboratory wins this month’s award for finding a hidden error in the water heating feature article in our October 2002 issue (

Vol. 11, No. 10). He astutely noted that in our text and graphic on page 9, explaining water-heating system efficiency losses, the percentages of heat loss and end-use add up to 109%, rather than 100%. The table was taken from the referenced paper from the ACEEE Summer Study, which also had the error, though the text of the original paper stated the information correctly. The distribution loss should be 9% rather than 18%.

– The Editors