106 



The Florists' Revkw 



Mat 22, 1019. 



Greenhouse 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 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. 



IS THE BOILER BIG ENOUGH? 



"We are enclosing a diagram of a 

 boiler made by the Ames Iron Works, 

 Oswego, N. Y. Please inform us 

 whether this boiler will heat 10,800 

 square feet of glass to a temperature of 

 55 degrees in zero weather. 



B. F. C— Ida. 



The sketch shows the boiler to be of 

 locomotive type, with twenty-four tubes 

 that have an inside diameter of two and 

 one-half inches and are five feet seven 

 inches in length. The shell of the boiler 

 is thirty-two inches in diameter and the 

 firepot is three feet in length. The width 

 of the firepot is not given, but we infer 

 that it is thirty-two inches, the same 

 as the diameter of the boiler. Just 

 what are the dimensions of the grate is 

 not stated, but they are probably four 

 to six inches each way less than those 

 of the firepot. 



To heat 10,800 square feet of glass to 

 55 degrees in zero weather, we would 

 use 3,000 square feet of radiation. Al- 

 though we have had no experience with 

 the boiler under consideration, we would 

 not think it likely to be economical of 

 fuel for the stated amount of radiation, 

 even if the grate is of the full size of 

 the firepot and if hard coal is used. For 

 use with a good grade of soft coal we 

 would prefer a boiler with a grate twen- 

 ty-five per cent larger than for hard 

 coal, since, while hard coal represents 

 about 12,000 British thermal units, the 

 average soft coal used in the western 

 states has less than 9,000 B. T. U. 



It is not economical to force the draft, 

 especially in a firepot boiler. Although 

 it may be possible to maintain the tem- 

 perature desired with a boiler of the 

 size mentioned, we would expect greater 

 economy in the fuel and labor, if soft 

 coal is used, with a boiler having about 

 ten square feet of grate area. 



WILL INSTALL LASGEB BOILEB. 



I intend to make some changes in the 

 heating system of my greenhouse. The 

 house is 35x100 and is three-quarter- 

 span, with four feet of glass on the 

 north and south sides. The height to 

 the ridge is fifteen feet. At present I 

 have a hot water boiler, but it is not of 

 the needed capacity and I shall put in 

 a larger one. "Will you please give me 

 information regarding the proper size 

 of boiler if steam heat is used and also 

 if hot water is used! I am enclosing a 

 sketch of the house. Two 3-inch flow 

 pipes from the boiler are connected with 

 a 4-inch header, from which three 3- 

 inch flow pipes run the length of the 

 hduse and are connected with a 4-inch 

 header at the farther end of the house. 

 Two 3-inch pipes from the latter header 

 connect with the return coils, one on 



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B WHEN YOU BUY- OCT A KROESCHCUL ■ 



a "THE BOILER OF UNEQUALED FUEL ECONOMY" Q 



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Expressions From Hen Who Know Boilers 



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Get the Kroeschell Pint 



Several yeai-a ago Mr. corresponded with us Id 



Kroeschell Hot Water Boiler, but was persuaded to iDstall 



cast Iron boilers which were claimed to be superior to the Kroeschell. 

 In the meantime we placed a number of Kroeschell Boilers 

 immediate vicinity of Mr. . and he.coaid not help 



regard to the 

 two sectional 



in the 

 but notice 



their (Treat efficiency, and last year, while at the convention, he placed his 

 order for his first Kroeschell. The folluwlng letter speaks for Itself: 



"Wft like the Kroeschell Boiler very mach. It Kivea entire sat- 

 iafaction, aud it is so easy to fire. I will trade yon the two cagt 

 iron sectional boilers for another Mice the Kroesoliell I have." 



[Siened] Mr. .Ohio. 



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No More Cast Iron Boilers 



I have used several different makes 

 of boilers but none. I like as well as 

 yours. 



The Kroeschell is easier to fire, takes 

 lees coal and water circulates quicker 

 than any other Imller. 



I have used two different makes of sec- 

 tional boilers— no more cast iron 

 boilers for as. 



[SlRned] Mr. . Mich. 



Kroeschell Replaces Cast Inn 



The Kroeschell has replaced three cast 

 Iron sectional boilers, and It certainly 

 has given entire satisfaction. 



It'oniT taken a few words to express the 

 Kood quality of your boilers and they are 

 as follows: "Of all firms handling boilers 

 and advertising them truthfully, the party 

 buying a boiler would have to get the 

 Kroeschell, as you are certainly advertis- 

 ing nothing but facts." 



[Signed] Mr. , N. Y. 



KROESCHELL BOILERS will put higti 

 temperatures into your heatins lines. 



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KROESCHELL BROS. CO., ^^t^cl^lfS: 



Street 



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