92 



TheWcekly Florists' Review. 



April 4, 1912. 



rangements quite clearly except in one 

 particular — the relative elevation of 

 the boiler and the returns — and that 

 is where the trouble most likely lies. 

 The diagram shows a 2l^-inch main 

 which runs with a slight upward pitch 

 to the farther end of the house, where 

 it branches and supplies two coils of- 

 five l^^.-inch pipes running along the 

 end and sides of the house back to the 

 boiler. The boiler has a 20-inch grate 

 and is evidently able to heat the house 

 readily, and there is no reason appar- 

 ent for the trouble mentioned unless 

 the returns are below the top of the 

 heater. 



It would be better, however, if the 

 flow were given a slight fall and the 

 expansion tank were connected with 

 the highest part of the flow, instead 

 of with the return, as seems to be the 

 case from the diagram. If the returns 

 are much below the top of the heater, 

 this would not do away entirely with 

 the difficulty, although it would lessen 

 it to some extent. Aside from raising 

 the boiler end of the flow pipe so that 

 it will have a slight fall, it will be 

 necessary to lower the boiler so that it 

 will be as low as, or lower than, the 

 lower part of the returns. 



Instead of lowering the boiler, the 

 same eflfect could be obtained by plac- 

 ing a mercury generator on the expan- 

 sion pipe. 



STEAM FOR THREE HOUSES. 



Kindly give me a few hints about 

 the heating system that I am going to 

 install. I have three connected houses, 

 each 27x200. The boiler pit is eight 

 feet deep and is at the center of the 

 houses, on the north side. 1 shall use 

 two No. 36, 8-section Ideal steam boil- 

 ers. My heating engineer advises me 

 to place the main supply pipe in the 

 same way as the return, in a trench 

 in the ground. Would this method 

 give me perfect circulation in the sys- 

 tem? I should not like to have a steam 

 trap attached to it. What would you 

 advise? I am located near Brooklyn, 

 N. Y. C. T. 



While the data furnished are not 

 sufficient!}' definite to warrant any- 

 thing but general suggestions, no good 

 reason is apparent for not following 

 the advice of the engineer. The main 

 supply pipe may be carried in a trench 

 directly across the three houses. From 

 this two or more supply pipes for each 

 of the houses may be taken off and 

 connected with the coils. Most of 

 these should be upon the walls, but, if 

 benches are used, it is generally ad- 

 visable to have at least two 1^/4 -inch 

 pipes under each of them. The coils 

 can be carried to the farther end of 

 each of the houses, with a slope of 

 about one inch in ten feet, and can 

 there be connected with the returns. 

 One return can be used for each house, 

 or all of the coils in the three houses 

 mav be connected to a common return. 



Sault Ste. Marie, Mich. — Alderman 

 W. E. F. Weber, proprietor of the Soo 

 Greenhouses, is planning to make ex- 

 tensive improvements as soon as the 

 weather will permit this spring. He 

 will build a large addition to his pres- 

 ent plant, extending the greenhouses 

 west to the street, thus giving him 

 5,000 feet of glass in addition to the 

 8,000 feet that he now has in commis- 

 sion. 



Greenhouse 

 Heating Systems 



and 



tf« 



RETURN TRAPS 



work well together 



It costs no more to have 

 free and clear steam lines 

 and an efficient heating sys- 

 tem than to have sluggish 

 lines and an inefficient heat- 

 ing system. 



It's useless to expect good 

 results when trying to put 

 steam through coils that are 

 half full of condensation. 



"Detroit" Return Traps 

 not only keep lines clear of 

 water but automatically re- 

 turn it directly to the boiler 

 at practically the same 

 temperature at which it is 

 condensed. 



Once installed, "Detroit" 

 Return Traps are always 

 on the job. 



steam Trap Bulletin No. 326-WF just 

 off the press. Yours for the askintf. 



Detroit, Michigan 



U. S. A. 



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This trap is constructed 

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Carried in stock by Job- 

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 the U. S. 



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Mention The Review when you write. 



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