Greenhouse construction : a complete manual on the building, heating, ventilating and arrangement of greenhouses, and the construction of hotbeds, frames and plant pits . ll from the heater, and the returns can come backnnderneatli. The arrangement of the pipes in a narroweven span house to be heated to forty-five degrees isshown in Fig. 59. OVERHEAD PIPING. In carnation and other cool houses where the amountof pipe is so small that it can be carried upon the plateand purlins, and particularly in short-span to the south*houses, the overhead piping will perhaps be feed ipe can be
Greenhouse construction : a complete manual on the building, heating, ventilating and arrangement of greenhouses, and the construction of hotbeds, frames and plant pits . ll from the heater, and the returns can come backnnderneatli. The arrangement of the pipes in a narroweven span house to be heated to forty-five degrees isshown in Fig. 59. OVERHEAD PIPING. In carnation and other cool houses where the amountof pipe is so small that it can be carried upon the plateand purlins, and particularly in short-span to the south*houses, the overhead piping will perhaps be feed ipe can be carried upon tlie ridge posts PIPING THE HOUSES. 109 (Fig. 60), aud the returns arranged as shown in thesketch, or the flows, as several small pipes, may be above,and the returns, as one or two large ones, below. COMBINED OVERHEAD AND DNDER-BENCH PIPING. For most commercial establishments the abovearrangement will be preferable to having all the pipesabove, or all under the benches. One method is illus-trated in Fig. 61, iu which the main is carried near theridge, and the returns in vertical coils upon the benchlegs. In the north-side propagating house, all of the. TIG. 61. COMBINED OVERHEAD AND UNDER-BENCHPIPING. pipes are under the bench. For an even-span house onehundred feet long and twenty feet wide to be carried atsixty-five degrees, the arrangement illustrated in Fig. 62will give good results. With a good fall, one and one-half inch pipes in thecoil can be used for a long run, but it will generally bebetter to make two coils on a side, each fifty feet the middle of the house, feed pipes (one and one-halfinch) can be taken off to feed the first coils, and the maincan be extended as a two-inch pipe to the end of thehouse, where branch pipes can be connected with theother coils. Fig. 63 illustrates a method of piping a 110 GREENHOUSE CONSTRUCTION, forcing house one Imndred and fifty feet long and twentyfeet wide that is to be kejjt at sixty-five degrees. Thecoils, a
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Keywords: ., bookcentury1800, bookdecade1890, bookidgreenhouseco, bookyear1894
