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122 



The Florists^ Review 



DSCKMBKR 18, 1919. 



fireenhoase 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- 

 ers, or the amount of radiation required 

 for a greenhouse, the needed temperatures 

 should be stated in the inquiry, as well 

 as thd 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. 



PIPING FOR HOT WATER. 



We are sending you a sketch of our 

 greenhouses. Please tell us how to pipe 

 our new house, 42x150 feet, for hot 

 water; it has a 7-foot gutter, four feet 

 of glass in the south side and two feet 

 of glass and two feet of ventilators in 

 the north side. The house is of pipe- 

 frame construction. How many flows 

 and returns shall we need on either side 

 and in the middle? 



House No. 4 will be connected with 

 the new house. We intend to run mains 

 through the door leading to No. 4, then 

 drop one and one-half feet to get under 

 the 7-foot gutter; this would allow us 

 a 1-foot drop to every fifty feet of heat- 

 ing pipe on the south side and approxi- 

 mately a 10-inch drop to every fifty feet 

 in the middle and on the north side. Is 

 this sufficient, or would it be better to 

 build a lean-to on the west end of the 

 new house? Running the main through 

 in this way would give two feet more of 

 drop. 



We now have a Kroeschell boiler, 

 size 3, which heats the four old houses. 

 What size of boiler shall we need to heat 

 the entire range, including a lean-to, 

 5x50 feet, on the west end of the new 

 house? The latter is to be used as a 

 cold house. The heat required is 60 

 degrees at 10 below zero. 



P. B.— N. y. 



Although the letter does not state how 

 much heat will be required in the old 

 houses, I infer that an average of 60 

 degrees will answer. The sketch shows 

 that these houses are, respectively, 

 20x100, 18x71, 18x71 and 15x69 feet. 

 In house No. 1 there is two feet of glass 

 in each of the side walls, but the others 

 all have wooden walls. About 5,000 

 square feet of radiation will be required 

 for the range, including the new house, 

 but it would be best to use a boiler 

 rated at about 6,000 square feet of hot 

 water radiation or, better yet, two 

 boilers of about 3,000 square feet each. 

 In mild weather one boiler will furnish 

 the heat needed, while the other can be 

 held in reserve for use in severe 

 weather and in case repairs are needed 

 in the other boiler. 



About one-half of the above radiation 

 will be needed in the new house. Either 

 five 3-inch or six 2V^-inch flow pipes 

 should be used. These should be con- 

 nected with a main at the west end of 

 the house, the main to be carried 

 through the lean-to as suggested. One 

 of the flow pipes may be placed on each 

 of the side wall plates and the others 

 may be supported on purlin posts, or sus- 

 pended from the purlins, in case a truss 

 roof is used. 



For a house of this length it will be 

 advisable to use 2-inch pipes for the re- 



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: KROESCHELL BOILERS: 



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Kroeschell Tubeless Boilers 



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It will pay you to consider the advantages of KROESCHELL 

 BOILERS for Hot Water or Steam no matter how large or 

 small the size of your establishment. 



The superiority of our boilers has resulted in the removal arid 

 abolishment of hundreds of cast iron sectional boilers— in every 

 instance KROESCHELL BOILERS give more heat with the 

 same piping with less fuel. 



KROESCHELL BOILERS have no bulky, soot- accumulating 

 surfaces— you avoid the disagreeable work and trouble indis- 

 pensable to cleaning boilers with complicated and tortuous back 

 and forth fire passages. 



The high safety factor of KROESCHELL BOILERS eliminates 

 the. danger of cracking and break -down risks. 



Successful greenhouse owners everywhere insist upon KROE- 

 SCHELL BOILERS because they are dependable and economical 

 — yon'get better and longer service— you can reduce your heating 

 costs by burning the cheapest grades of soft coal. 



It is a sign of scientific management to own a KROESCHELL 

 —a business management that insures a responsi\e, efficient 

 andlprofitable heating system. 



The supremacy of KROESCHELL BOILERS 



is proven by their country-wide adoption. 



Our Water Tube Steam Boiler 



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MAKE SURE YOU GET A KROESCHELL 



Str««t 



-KROESCHELL BROS. CO., ^^n'Sil^SSMZ 



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