170 



The Florists^ Review 



Mabch 18, 1920 



Greenhouse Heating 



FOB OABNATIONS IN CANADA. 



Please tell me the proper number and 

 arrangement of the pipes for a house 

 30x125 feet, with 3-foot concrete foun- 

 dations and thirty-six inches of glass in 

 the sides. I shall use hot water and 

 want to give the house a temperature 

 suitable for carnations. M. B. — Can. 



The inquiry does not state the outside 

 temperature for which the heating sys- 

 tem must be planned, but, with an ordi- 

 nary minimum outdoor temperature of 

 10 to 15 degrees below zero, it will be 

 possible to maintain a temperature of 

 50 to 55 degrees in the house described 

 by using five 2 ^^ -inch flow pipes and 

 fifteen 2-inch returns. One flow should 

 be on each plate and the others on the 

 middle and purlin posts. A coil of three 

 returns should be on each side wall and 

 under each of the three benches, or in 

 the walks if solid beds are used. 



With a well built house, it will be 

 possible to keep up a temperature of at 

 least 50 degrees even though the outside 

 temperature may drop to 15 or 20 de- 

 grees below zero, by giving the fire a 

 little extra attention. 



I should recommend a boiler rated for 

 at least 2,000 square feet of radiation 

 and with eight square feet of grate. 



FOB SXTBZEBO WEATHEB. 



I have a house 25x150 feet, with four 

 feet of glass in the side walls and two 

 feet of cement above the ground level. 

 The east end is of glass. What size of 

 hot water boiler is required to hoat this 

 house in our climate, which sometimes 

 is 25 degrees below zero? I want to 

 maintain a heat of 65 degrees in tlio first 

 fifty feet and 52 degrees in the l)ack of 

 the house. The shed is at the north 

 «nd of the house. Could you tell me the 

 amount and the size of pipe required 

 and the best lavout for heating? 



J. M. G.— Can. 



It is stated that the front of the 

 house is to be heated to 65 degrees and 

 the back to 52 degrees. It is doubtful 

 which end of the house is the front and 

 which is the back, but we will consider 

 the front to be that next to the boiler 

 room. 



To provide the temperature men- 

 tioned under the climatic conditions 

 stated will require a large amount of ra- 

 diation. If 50 and 60 degrees could be 

 taken as a minimum, a considerable re- 

 duction might be made. 



It is advisable to use a hot water 

 boiler rated for 2,800 square feet of ra- 

 diation, which will require a grate 

 about 30x48 inches. The chimney should 

 be fifteen inches in diameter and thirty 

 to thirty-five feet in height. 



For radiation use four 3-ineh flow 

 pipes, placing one on eacli plate and one 

 upon each row of purlin posts, giving 

 them a slight fall. There should be 

 four 2-inch pipes in each of the four 

 coils. This will give 52 degrees. For 

 the additional 13 degrees in the north 

 section, run a 3-inch flow under the 

 ridge as far as the partition and con- 

 nect it with four 2-inch returns under 

 the middle bench and run them back to 

 the north end of the house. 



Of the other returns, j)lace four upon 

 each side wall and the others under the 

 purlins. Fnlt-ss the to[> of the heater 



KROESCHELL 



GREENHOUSE SPECIALTIES 



NOT 

 CAST 

 IRON ; 



Made in 20 Sizes 



HEATING and COOLING are two branchp"! of engineering on 



which we specialize for the ffreeahoate trade. 



Over thirty years have been devoted by 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. 



Tubelefts 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. 



KROESCHELL' 



IRt&cWATFRTUBt 



'ATCNTeo laii 



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 Kroeschell 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. 



Safety 



C02 



Ecoitmy 



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 KROESCHELL BROS. ICE MACH. CO. 



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 CHICAGO, ILL. 



