Posted by Rick Foltman (63.77.247.10) on October 19, 2009 at 14:45:12:
In Reply to: Re: home energy efficiency ana posted by frank Maple on October 18, 2009 at 14:11:32:
: I think the basis is 70 degrees, but don't recall for sure. However, what that refers to is how the mean temperature of a day compares to the standard. If the temp averages 33 degrees for the day, then that would be 37 heating degree-days. If it averaged 90, then that would be 20 cooling degree-days.
Heating & Cooling Degree basis is 65F. An average temperature above 65F is considered a Cooling Degree Day(CDD) while an average below 65F would be considered a Heating Degree Day(HDD).