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Calculating Heating/Cooling Degree Days


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2008, 2009 Merit Award Winner

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By Grant in Blacksburg, VA on 1/30/2009


I just found a wonderful web-based tool for automatically calculating HDD or CDD from automatically located, local weather station data. Thought I'd share:

degreedays.net

A good explanation of HDD/CDD:

knol.google.com/k/martin-bromley/degree-days

energylens.com/articles/degree-days

 


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By Jon in Ellicott City, MD on 1/30/2009


This weather site has historical information, and will calculate HDD and CDD for a one-week, one-month, or one-year period. It's good to have two sources for these things, just as a sanity check.

Select "history data" at the top of the page, then enter your location.

Weather Underground History


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By Grant in Blacksburg, VA on 2/2/2009


I believe Weather Underground is the actual source of the data used by the web program I linked to.  The web program just provides a more detailed analysis of the Wunderground data and spits it out to you in an Excel spreadsheet taking things like base load into consideration on the "actual" HDD/CDD of a specific building. That is what makes the tool I linked to fairly unique and highly valuable in my opinion.

Regards,

Grant


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