. Florists' review [microform]. Floriculture. 168 The Florists^ Review March 30. 1922 Greenhouse Heating BEABRANOING OLD SYSTEM. I have one greenhouse 30x150 feet, which is behind a hill and partly pro- tected by woods. This house has a 2-foot concrete wall on the north side and four feet of glass on the south side. The west end is three-quarters glass. The ridge pole is twelve feet high. In addition to this house, there is a second house, 16x64 feet, the floor of which is eight feet higher than that of the large house. There is a 6-foot space between the two houses, but the walls of the secon
. Florists' review [microform]. Floriculture. 168 The Florists^ Review March 30. 1922 Greenhouse Heating BEABRANOING OLD SYSTEM. I have one greenhouse 30x150 feet, which is behind a hill and partly pro- tected by woods. This house has a 2-foot concrete wall on the north side and four feet of glass on the south side. The west end is three-quarters glass. The ridge pole is twelve feet high. In addition to this house, there is a second house, 16x64 feet, the floor of which is eight feet higher than that of the large house. There is a 6-foot space between the two houses, but the walls of the second house are the same as those of the big house. The ridge pole of the second house is nine feet high. The boiler with which I expect to heat this range is a Lord & Burnham 5-section boiler, with grates 3x4 feet. This boiler is located in the middle of one end of the big house and has a 4-inch main, branch- ing to each side wall of the house. The floor of this house has a 2i/4-foot pitch and the lower side has four 2-inch flows and four 2-inch returns. The upper side is fitted with three 2-inch flows and three 2-inch returns. Would this boiler give more heat if more flows and returns were added? Would you advise adding more sections to the boiler or yoking another boiler to it, in order to heat the second house! O. C. E.—Md. It is uncertain, from the above ques- tion, whether morfe heat is desired in the present house or if merely some idea of the capacity of the boiler is requested. With the present amount of radiation it will require quite heavy firing to raise the temperature above 45 degrees in zero weather. While it would not be advisable to suggest any change in the piping if 45 degrees is as high a temperature as is desired, it would be better to use one more return if you are to rearrange the piping, using an additional return for 50 degrees. The boiler is amply large to heat an additional house of the pize mentioned, provided, of course, that the size and height o
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