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Outdoor design temps

Brad White
Brad White Member Posts: 2,399
in THE MAIN WALL
Too tall an order for me. I mean, one or two is fine...


Roland's idea seems a bit more practical.

I ordered my data on CD-ROM for $75 a few years ago, via the NOAA web site. Still a good deal but much more information than you need if you just want temperatures.
"If you do not know the answer, say, "I do not know the answer", and you will be correct!"



-Ernie White, my Dad

Comments

  • tk_3
    tk_3 Member Posts: 36
    Outside design temps

    Where do I get a copy of outdoor design temps for doing heat losses?
  • Dave_4
    Dave_4 Member Posts: 1,404
    Common sense or...

    NOAA weather data.

    Simply ask the homeowner the coldest day he can recall in the past five years. If it seems mild, use that number. If it seems like a once every 100-year exception, add 10F

    There is substantial "fudge" in boiler ratings anyhow. I=B=R numbers are ~ 15% above actual output. I would never size a boiler based on this 15% fudge inclusion - but I would use 5-10% of it, if the next model size up was more than 25,000 BTU's too big!

    Let us know what you decide

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  • Brad White
    Brad White Member Posts: 2,399
    If you let me know your geographic location

    I may be able to post a PDF of USAF data, if not ASHRAE data. Let me know?

    Brad
    "If you do not know the answer, say, "I do not know the answer", and you will be correct!"



    -Ernie White, my Dad
  • tk_3
    tk_3 Member Posts: 36


    I would be interested in the ASHRAE PDF files if possible for the entire country. I know they had a chart which listed states and some cities in each state. This is for some research I am working on. Thanks
  • Roland_4
    Roland_4 Member Posts: 84
    Weather Data

    Try this link. It works by zip code. And it's free.

    http://www.weatherbase.com/
  • Roland_4
    Roland_4 Member Posts: 84
    Weather Data

    http://www.refdesk.com/weath1.html

    Huge data resources.
This discussion has been closed.

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