Outside Design Temperatures

Brad White_71

Richard-

See the attached in PDF format. USAF data, 18 pages with lots of good stuff. First page is a good summary.

I would use the 99% or 99.6% values for heating and the 1% values for cooling, but you know the area, you be the judge.

Hope this helps.

Brad

Richard_16

Outside design temperatures

I am trying to find the o.d.t. for N. Massapequa/South Farmingdale area. Can anyone direct me to where I can find this information. Thanks.

Unknown

what state?

Canada? Mich? Maine? Texas? Az?

Techman

Design Temps

That would be for Long Island N.Y.

Richard_17

O.D.T.

Sorry - Long Island N.Y.

Eugene Silberstein 3

Check your e-mail

You should have a response e-mail from me on 5/12 @ 8:47 AM with your answer.

The temps were:

15 degrees heating

About 87 degrees cooling

Regards,

The Professor

mark schofield

"http://www.crownboiler.com/educate/heatloss.asp"

keep scrolling down and there is a list of cities and temperatures.

Richard_18

O.D.T.

Thank you - I have read your email, however my town borders Suffolk county not Queens county. I checked the crown boiler website and the best I can find is 10*. There doesn't appear to be much difference between Queens and Nassau county temps. I was trying to get as close as possible to my town. Thanks again.

Richard_19

O.D.T.

Thank you.

ALH_4

Design Temp

What is what is the coldest outdoor temperature at which you want the system to maintain your target indoor temperature?

-Andrew

John Ketterman

You are taking the numbers too seriously. A few degrees should not matter, there is enough slop in the system that if it works at 10F it should work at 5F. Heat calc programs leave a generous safety margin.

Of course, there can be exceptional cold waves where the heating system won't be able to keep up, but if it is 5F colder than what the heating system can handle, it will take a day or so of the cold wave before people can feel that the house is getting cold. And such extreme cold usually doesn't last very long.