The book Hand book for Heating And Ventilating Engineers was written by author James D James David Hoffman Here you can read free online of Hand book for Heating And Ventilating Engineers book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Hand book for Heating And Ventilating Engineers a good or bad book?
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88 shows a few of the many methods in common use. A very simple conduit is shown at A. This is built up of wood sections fitted end to end, then covered with tarred paper to prevent surface water leaking in and bound with straps. The pipe either is a 186 HEATING AND VENTILATION loose fit to the bore and rests upon the inner surface, or is supported on metal stools, driven into the wood or merely resting upon it. These stools hold the pipe concentric with the inner bore of the log. With much mov...ement of the pipe endwise, from expansion and contraction, these stools should not be used unless they are loose and have a wide surface contact with the wood. A metal lining with the pipe resting directly upon it is considered good. The conduit is laid to a good straight run in a gravel bed and usually over a small tile drain to carry off the surface water, excepting as this drain is not necessary in sections where there is good gravel drainage. The insulation in A. Is only fair. The air space around the pipe, however, is to be commended.
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