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Nesgroup address: alt.building.construction - Date & Time for the message: Sat, 21 May 2005 08:28:52 -0400
/ Author of the message: "BP" |
Title of the message: |
Re: Quick Attic Ventilation Question
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Text of the message: |
Complicated fluid dynamics. At a layman's level, yes, they behave more like exhaust than intake in greater than 50% of the cases. But, the way gable vents work is that air blowing towards one vent creates positive air pressure and the air moving away from the other vent creates negative pressure so one vent is intake and the other is exhaust. Maybe on a perfectly calm day they would both exhaust. Now a ridge vent work similarly. Air blowing over the top of the vent creates a negative pressure area on one side of the vent that sucks the air out of the attic. The replacement air is supposed to come from the soffit vents, thus creating the cold air flow along the rafters that is the design effect. But with the addition of gable vents this make up air will more likely come from the gable vents as intake, not from the more distant soffit vents. That is why it is recommended to do one or the other but not both when it comes to attic venting. |
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Estaplace.com is one the Ceglia Giovanni projects, started on 20 July 2005, and online since 20 August as a real estate platform for listings, mainly operating on the Italian and American/English market in the Internet, Estaplace would like to become the point of referiment for home sellers and home buyers, a site where private owners or real estate agencies can have the possibility to show their offers to the world. Estaplace.com is only one of the Giovanni Ceglia's sites. Everyday Giovanni Ceglia works to improve new Internet tools and services for online marketing and business. Estaplace.com will become the biggest portal for real estate business and investments online.