Posted by Harry Sands (24.96.149.2) on October 19, 2009 at 16:39:13:
In Reply to: Re: home energy efficiency ana posted by Rick Foltman on October 19, 2009 at 14:45:12:
: : 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).
Thanks to frank Maple and Rick Foltman. I have found out that the local (or regional) Weather Bureau web sites post statistical weather data by month/year including HDD - Heating Degree Days and CDD - Cooling Degree Days. This seems to be the easy way to get the numbers needed for an energy efficiency analys recently discussed in Jim Dulley's column