Building Code and Building Construction - Questions and Answers Or when you want to know how construction is supposed to be done. |
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Hearthman wrote:Actually, the answer is right under our noses. IFGC 503.5.4 Chimney terminations ....."and is at least 2 feet (610 mm) higher than any portion of a building within a horizontal distance of 10 feet (3048 mm)."
We tend to think of this rule pertaining just to adjacent gable walls and such but it includes roof turbines because they are a "portion of a building". By locating 2 feet above this feature of the building, you get the flue gas outlet into clear, undisturbed wind and above this opening.
Though turbines normally exhaust, all it takes is a wind eddy to recirculate air. By maintaining this separation, you should reasonably prevent recirculation of flue gases.
Now, if you want, you could cite an ASHRAE Standard, 62.1, Ch. 5 that deals with such separations from 'hazardous exhausts' at a min. 15ft for normally bad stuff and 30 ft. separation for extra bad stuff. Based upon personal experience, I find the 2/10 rule sufficient.
Marc M wrote:From the 2006 IRC. (underlining and bold are mine)
- - M1501.1 Outdoor discharge. The air removed by every mechanical exhaust system shall be discharged to the outdoors. Air shall not be exhausted into an attic, soffit, ridge vent or crawl space.
This looks good jerry.
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