[TheForge] Something I've forgotten or worse yes I just imagine I once knew.

[CGRAF]

Thanks I have and use that book quite a bit when I am figuring revents 
of existing chimneys.

What I was looking for was something we used to use all the time with 
old natural vent gas furnaces (60 afue).

IT was not real precise, but you could tell in a heartbeat if  a flue 
was adequate when someone wanted to add just "one more appliance"

Mike Graf



On 9/3/2013 12:23 PM, Charles wrote:
>
>
>
> For Gas Vent
>
> http://www.hartandcooley.com/assets/files/c3/hart-cooleytypebgasventall-sizing_guide.pdf
>
>
>
> And of course building codes will give guidance as well.... Here is 2005 ICC
>
> http://www2.iccsafe.org/states/new_york/NY_FuelGas/PDFs/Chapter%205.pdf
>
>
> Charles
>
> ________________________________
>   From: "wmullett at bright.net" <wmullett at bright.net>
>
>
> I think that rule of thumb would be invalid.  Besides chimney area and height, the draw of a chimney is also dependent on exhaust temperature and the temperature of the flue.  A flue that is mostly exterior may cool too quickly to maintain a suitable draft.
> ______________________________________________________________
> TheForge mailing list
> Home: http://mailman.qth.net/mailman/listinfo/theforge
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:TheForge at mailman.qth.net
>
> TheForge mail list group photo site is
> http://www.shutterfly.com
> Login: blacksmithblacksmith at hotmail.com
> Password: anvil
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>