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The Florists^ Review 



April 8, 1020 



Greenhouse Heating 



SuBSCBiBERS 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- 

 ers, 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. 



FOUR HOUSES, ONE BOILER. 



I should like to know the size of a 

 boiler required to heat the following 

 greenhouses to a temperature of 55 de- 

 grees at 4 degrees below zero: One 

 house, 30x175 feet, with four feet to 

 the gutter and thirteen feet to the ridge; 

 one, 22x100 feet, with twelve feet to 

 ridge and five feet of wall; one, 9x75 

 feet, with seven feet to ridge and five 

 feet of wall; one, 28x130 feet, with four- 

 teen feet to the ridge and seven feet of 

 walls and four feet of glass. The first 

 three houses have no glass in the walls. 



I have a tubular boiler 2%x9 feet. 

 It has a dteam dome and thirty-two 3- 

 inch flues. What size should the fire- 

 box be and how high and what size 

 should the chimney be? I want to use 

 the hot water system. 



What size of flows :ind how many 

 2-inch returns are required to heat these 

 houses? All the houses are connected. 



G. B. & S.— Ore. 



To heat the four houses described to 

 55 degrees when it is 10 degrees below 

 zero, about 4,000 square feet of radia- 

 tion will be required and, if one boiler is 

 to be used, it should have a rating of 

 about 5,000 square feet of hot water 

 radiation, with twelve square feet of 

 grate. 



The boiler described is, as surmised, 

 only about one-half large enough. Such 

 a boiler should have a grate about thirty 

 inches square. It requires a chimney 

 fourteen inches in diameter and thirty 

 feet high. 



For the house 30x175 feet, use five 

 2i>^-inch overhead flow pipes and ten 

 2-inch returns. In the house 22x100 

 feet, three 2%-inch flows and nine 2-iuch 

 returns will suffice. One 2 1^ -inch flow 

 and four 2-inch returns will answer for 

 the house 9x75 feet. The house 28x130 

 feet, with four feet of glass in the side 

 walls, should have five 2%-inch flow 

 pipes and twelve 2-inch returns. 



FOR OVERHEAD HEATING. 



I have a house 18x75 feet, with thirty- 

 six inches of 14xl8-inch glass in the 

 side walls and 16x24-inch glass in the 

 roof. The side wall is of boards and 

 waterproof paper. I am using 3-inch 

 boiler tubes. I have two flows and two 

 returns on each side under the benches. 

 I should like to carry some of the pipes 

 overhead. Can I use the four pipes 

 under the benches for returns? What 

 size of pipe should I use for the flows 

 and what distance should they be from 

 the glass? I have a tubular boiler with 

 a 28-inch grate. The pipes are all run- 

 ning uphill and all the returns are above 

 the top of the boiler. I can keep a tem- 

 perature of 60 degrees at 20 degrees 



KROESCHELL 



GREENHOUSE SPECIALTIES 



NOT 



CAST 



IRON 



Mad« in 20 Sises 



HEATING and COOLING are two branches of engineeruiB on 

 which we specialize for the greenhoute trade. 



Over thirty years have been devoted bv us to the construction 

 and designing of boilers and refrigerating apparatus. 

 During this period we have furnished and installed heating and 

 cooling systems for the most successful greenhouse men in this 

 country. .^ 



Tttbeless Boiler 



KROESCHELL Boilers are making the most wonderful green- 

 house heating record in the world. Florists who have used 

 other makes are constantly giving the KROESCHELL the 

 highest praise. 



KROESCHEU.: 



PIRt^WATFRTUBt 



VATCNTeO ■•!* 



BOILER. 



The High Pressure Kroeschell— a highly efficient unit for steam 

 plants 100 H. P. and over. 



13,468,520 sq. ft. of glass was equipped with KROESCHELL 

 Boilers during the past five years. 



Water Tube Steam Boiler 



When in need of refrigeration investigate the KroeschelJ Sys- 

 tem—its high efficiency and low cost of operation place the 

 Kroeschell System of Refrigeration in the foremost rank for 

 greenhouse use. Our system of Refrigeration and Cooling is 

 easily installed— perfect control of temperature and absolute 

 safety insured— no ammonia used for this system. 



Send for Boiler or Ice Machine Catalogues. 

 State which is wanted. 



BUY DIRECT-FACTORY TO USER PRICES 



KROESCHELL BROS. CO. 44. ^,,. ,-„ ..„.. 



KROESCHELL BROS. ICC MACH. CO. Chicago, ill. 



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