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134 



The Florists' Review 



Mabch 11. 1820 



CrecBhoBse H eating 



TUIKTY-YEAB-OLD BOILEIl. 



Oould you tell me how large an estab- 

 lishment could be heated with a hori- 

 zontal tubular boiler, about 30 years 

 old, but in good condition! It has stood 

 a pressure of 125 pounds and is sixteen 

 feet long and fifty-eight inches in diam- 

 eter; has forty-eight 4-inch flues and 

 grates 4%x5 feet. It is about 75-horse- 

 power. I want to build the houses sepa- 

 rate, with four feet of glass in the north 

 and south walls, and full glass gables, 

 each house to be 35x100 feet. I should 

 like to have heat of 55 degrees when 

 it is 20 degrees below zero. How many 

 houses of this size could this boiler take 

 care of? L. B. W.— Wyo. 



As nearly as can be estimated from 

 the data furnished, a house similar to 

 those described will contain about 5,200 

 square feet of glass or its equivalent 

 and a 75-horsepower boiler will supply 

 radiation for 28,000 square feet of glass 

 to be heated to 55 degrees, when it is 

 20 degrees below zero, in addition to 

 the usual proportion of mains. 



From this it will be seen that about 

 five houses can be heated with a 75- 

 horsepower boiler under the conditiona 

 mentioned. 



While a boiler that is 30 yean old 

 should be looked upon with suspicion, 

 if it is in good condition it may give 

 service for a number of years and can 

 be used with safety for low-pressure 

 heating. 



TOO FEW FLOW PIPES. 



I am sending you a blue print of my 

 greenhouses, which shows three houses 

 20x50 feet, with concrete walls three 

 feet high and thirty-two inches of glass. 

 Each house has a 2i^-inch overhead flow 

 pipe and eight l^^-inch returns upon 

 each side wall, the return coils starting 

 on either side of the door at the end of 

 the house, thus making them nearly 

 sixty feet long. There is about 480 

 square feet of radiation in each of the 

 houses, in addition to some fifty square 

 feet of radiation supplied by the mains. 



The heat is hot water and is poor. I 

 should like a heat ot 60 degrees in zero 

 weather, but cannot get more than 30 

 degreos at night. The plumber put a 

 "booster'' on, which he said would end 

 all the trouble, but I believe it is worse. 

 The pipes have a good fall, as the boiler 

 is three feet down in a pit. The only 

 discrepancy in the blue print is that in- 

 stead of two No. 6 boilers shown in the 

 print, I have a new Burnham boiler. 

 No. 36-5, with a firebox 36x36. The ex- 

 pansion tank is just above the highest 

 point and I am thinking of building a 

 cupola above the roof to raise the tank. 

 Of the eight pipes on the side walls, the 

 bottom two are always cold, but the top 

 two get hot and the 2i^-inch flow is 

 always hot. P. C. L. — Can. 



It appears that there are two factors 

 which prevent the securing of satisfac- 

 tory results from the heating system. 

 The first is that there is altogether too 

 much radiation attached to each of the 

 214-inch flow pipes, since each flow not 

 only supplies over 530 square feet of 

 radiation within each of the houses, but 

 there is also thirty or more feet of radia- 

 tion in the mains outside of the green- 



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□ STEAM UNITS OF SUPERIOR FEATURES 



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No Tubes 

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IMasonryl 

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Plants 



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Horse Power 



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Krocachell Water Tube Steam Boiler 



:KR0ESCHELL High Pressure Unit 



100 to 350 HORSE POWER 



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KROESCHELL: 



MRticWATERTUBt 



'ATKHTCO ■•» 



BOILER. 



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Our BABY Steam Boiler 



KROESCHELL TobeleM Steam Boiler 



■ KROESCHELL BROS. CO., *^Hrc/5^-.S![:- I 



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