Talk:Heating degree day

message: There are more differences between US and UK practice than just the Fahrenheit/Celsius dichotomy. In the US, for heating degree days, the daily temperature deficit is always just the simple difference between mean and base temperatures. In UK practice, different formulae are used when the maximum, mean, or minimum temperature respectively exceed the base temperature (similar considerations apply to cooling degree days).
Another issue is the choice of base temperature. UK conventions for heating are 18.5, 15.5 and 10.0 Celsius, while cooling figures are customarily published to bases of 15.5 and 5.0 Celsius. Other countries have their own conventions.
Incidentally I think there is a mistake in the article regarding temperature conversion. Because degree days are accumulated temperature differences we only need to scale them by 5/9 or 9/5. No need to worry about the 32 F
Vilnis 22:06, 17 January 2007 (UTC)

message: I was looking for clarification of a point that is typically glossed over with a hand-wave. "The HDD is THE difference between THE daily Temp (or THE Average Daily Temp) vs a standard Base-Temp." Okay, What is THE daily Temp? 
We know temperature varies, (at times above and below the Base-Temp). However we usually only get two daily (Max, Min) historical values. Given hourly readings I assume - - - Now, I'm again confused, I can imagine several averaging (integrating) possibilities.
I can't edit this, as I'm still confused about what I was hoping Wikipedia would clarify explicitly.
Thanks, HalFonts (talk) 23:45, 13 June 2009 (UTC)
thread_title:  Average Daily Temp = ??? 

message: Hello fellow Wikipedians,
I have just modified 2 external links on Heating degree day. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
*Added archive https://web.archive.org/web/20080714224406/http://www.eci.ox.ac.uk/research/energy/degreedays.php to http://www.eci.ox.ac.uk/research/energy/degreedays.php
*Added archive https://web.archive.org/web/20140521013922/http://www.cibse.org/knowledge/cibse-tm/tm41-degree-days-theory-and-application to http://www.cibse.org/knowledge/cibse-tm/tm41-degree-days-theory-and-application
When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.
Cheers.—InternetArchiveBot (Report bug) 02:44, 1 November 2017 (UTC)
thread_title:  External links modified 

message: Hello fellow Wikipedians,
I have just modified 2 external links on Heating degree day. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
*Added archive https://archive.is/20130213165433/http://www.rehva.eu/en/515.nzeb-office-building-ymparistotalo-in-helsinki-finland to http://www.rehva.eu/en/515.nzeb-office-building-ymparistotalo-in-helsinki-finland
*Added archive https://web.archive.org/web/20100328000527/http://ipm.illinois.edu/degreedays/calculation.html to http://ipm.illinois.edu/degreedays/calculation.html
When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.
Cheers.—InternetArchiveBot (Report bug) 22:25, 24 January 2018 (UTC)
thread_title:  External links modified (January 2018)