102 



The Florists^ Review 



Mat IB. 1»19. 



GreenhoDsc Heating 



Subscribers are invited to write the 

 Editor of this Department with regard to 

 any details of greenhouse heating that 

 are not understood. When information 

 is desired regarding the capacity of boil- 

 era, or the amount of radiation required 

 for a greenhouse, the needed temperatures 

 should be stated in the inquiry, as well 

 as the amount of glass in the side walls, 

 and the dimensions and general arrange- 

 ment of the greenhouses. It is often help- 

 ful, also, to have a sketch showing the 

 location of the houses. 



NOT ENOUGH RADIATION. 



I am enclosing a sketch that shows 

 the layout of our greenhouses, which 

 are not completed, owing to the death 

 of the former owner. Having had no 

 previous experience in greenhouse work, 

 I shall be pleased to get your advice. 

 There are four houses, each fifty feet 

 long. Nos. 2 and 4 are each eighteen 

 feet wide and Nos, 1 and 3 are each 

 twenty feet wide. The side walls are 

 four feet high, and consist of two feet 

 of glass and two feet of wood. The 

 gables at the exposed end have two feet 

 of wood, except in the case of house 

 No. 2, which has four feet of wood. 



We have a lO-horsepower steam 

 boiler, made by James' Leffel & Co., of 

 Springfield, O., but we are using it for 

 hot water. There are two 3-inch out- 

 lets, one from the steam dome and the 

 other from the top of the rear end of 

 the boiler. These are joined about three 

 feet above the boiler and continue as 

 one 3-inch flow. The overhead pipes 

 and the return pipes in the houses are 

 all 2-inch. The main return is about ten 

 inches below the center of the boiler, 

 which is three feet in diameter. 



We are compelled to force the boiler 

 to keep from freezing when the tem- 

 perature outside drops to 15 degrees 

 above zero, while the return pipe to the 

 boiler is so hot that it is impossible to 

 hold the bare hand on it. We wish to 

 pipe No. 4, which has not been com- 

 pleted, and provide for benches at the 

 side and a bed in the center. Our busi- 

 ness is the production of cut flowers and 

 our crops are carnations, chrysanthe- 

 mums and calla lilies, with sweet peas 

 following the mums. Please tell us how 

 to pipe to maintain the proper tempera- 

 ture when the outside temperature is 10 

 degrees below zero. N. F. C. — O. 



We are not familiar with the boiler 

 mentioned, but it should have a grate 

 about thirty inches square, and even 

 then will require careful attention if 

 it is to heat the four houses to 50 de- 

 grees when the outside temperature is 

 10 degrees below zero. 



The sketch shows two 2-inch overhead 

 flows in each house, with five returns in 

 houses 1 and 3 and four returns in house 

 No. 2. This amount of radiation is al- 

 together too small for the purpose, and 

 accounts for the failure to keep the 

 houses from freezing even in compara- 

 tively mild weather. While the uniting 

 of the two outlets to one 3-inch flow 

 pipe might answer when only three 

 houses are to be heated, even then we 

 would prefer to connect each outlet di- 

 rectly with the main flow pipe and this 

 will certainly be necessary when an ad- 

 ditional house is to be heated. Instead 

 of connecting the outlets, run a 3-inch 



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- CHICAGO'S LEADING - 



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THE FAMOUS OECHSLIN PLANT. 

 100,000 SQ. FT. OF GLASS-HEATED BY KROESCHELL BOILERS. 



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Mr. Oechslin's arreenhouaes are the show place of Chicaso, and visitors are 

 always welcome. Oo and see this wonderful range and when you admire 

 the perfection of the plants and the cleanliness of the place, remember to 

 visit the boiler rooms and note that the name KROESCHELL is found on 

 every one of the boilers. 



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^ WHEN YOU BUY- 



■ GET A MROESCHELL 



THE KROESCHELL 

 SAVES COAL AND LABOR 



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J OECHSLIN'S FINE PLANTS AT NATIONAL FLOWER -HOW. 



I KROESCHELL BROS. CO., **t^cSSS. 



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