There ya go!
Thanks Bruce.
Eric Hammarberg, Assoc. AIA
Vice President
Thornton Tomasetti
51 Madison Avenue
New York, NY 10010
T 917.661.7800 F 917.661.7801
D 917.661.8160
[log in to unmask]
-----Original Message-----
From: Bruce Marcham [mailto:[log in to unmask]]
Sent: Friday, May 05, 2006 4:09 PM
To: [log in to unmask]
Subject: Re: [BP] more on spirally jell-o
"Turbine roof ventilator" is what my catalog (RE Michel, an HVAC supply
house) calls them "Wind powered for residential and industrial use" [don't
think of using them on a commercial application!]. They are rated for
varying amounts of air flow based on a 4 mph wind, 10" TD (which seems to
mean throat or stack diameter), and a 30' stack.
Here are some of the links I found with a Google of "turbine ventilators":
http://www.edmonds.com.au/html/products/turbine_ventilation_for_homes.htm
http://www.mpvent.com/turbine_vent.html
http://www.lomanco.com/Turbinemain.html
-----Original Message-----
From: B-P Golden Oldies: "Is this the list with all the ivy haters?"
[mailto:[log in to unmask]]On Behalf Of Hammarberg,
Eric
Sent: Friday, May 05, 2006 2:52 PM
To: [log in to unmask]
Subject: Re: [BP] more on spirally jell-o
I think cause they work similar to the old gravity heating systems that
relied "passively" on hot air rising. I know that does not explain the
spinning top and that a rain shield would work jus as well AND the spinning
top draws more air on windy days but that's what I know...
-----Original Message-----
From: [log in to unmask] [mailto:[log in to unmask]]
Sent: Fri May 05 15:46:19 2006
To: [log in to unmask]
Subject: Re: [BP] more on spirally jell-o
In a message dated 5/5/2006 3:35:41 PM Eastern Standard Time,
[log in to unmask] writes:
I have always called them "gravity vents".
Eric, what's so "gravity" about them? And I still can't believe they are
designed to "work" only when the wind blows. This is just what we need
Yukon Guy for - where is he?
yrs Rainbow
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