974 



The Weekly Florists^ Review* 



August 30, 1906. 



house will be likely to get its share of 

 heat, while if divided at considerable 

 distance from the boiler one house may 

 rob the other. A 2-inch flow pipe in the 

 house will provide sufficient heat for this 

 house if the water is maintained at 180 

 degrees. L. C. C. 



SYSTEM OF FIVE HOUSES. 



We have five houses, built together, 

 partition wall between only the north 

 house and the next one. Each section 

 is 14%xl20 feet, six feet to gutters, ten 

 feet to ridges. The north house wants 

 60 degrees, the others 50 to 55 degrees. 

 On the manifolds at the end of the 

 houses farthest from the boilers we have 

 rearranged the connections so that the 

 hot flow enters them at the end nearest 

 the boiler, instead of passing them and 

 entering at the other end. "We did this 

 because we found the two lower coils 

 were cold when the upper ones were 

 hot. Does this change make any differ- 

 ence ? 



We have 'a 2i^-inch flow and seven 2- 

 inch returns under each gutter, with 

 3-inch main returns, increasing to 4- 

 inch as they enter the boiler at the end 

 of the middle house. Our boiler is over- 

 loaded. We have a chance to buy a 

 boiler rated 1,500 square feet. Can we 

 change the system so as to install this 

 boiler for auxiliary use, with steam, on 

 cold nights? A riser in the middle house 

 has the expansion tank connected at the 

 top, but not the highest point. What 

 changes do we need in the piping if we 

 use the auxiliary boiler? J. W. M. 



No, the slight modification made in 

 the way the flow pipe enters the mani- 

 fold would make no difference in the 

 operation of the plant. If you have the 

 expansion tank connected with the riser 

 in the manner you say, this is bad. 

 Cut it out and make connection with 

 the expansion tank directly to the main 

 return near where it enters the boiler, 

 then elevate the expansion tank, which 

 should be at lesjst fifty gallons capacity, 

 twelve or fifteen feet above the highest 

 pipes in the system. 



Jf you wish to install an auxiliary 

 boiler to be used for steam during se- 

 vere weather, connect it up with the sys- 

 tem in the usual manner, but locate the 

 boiler so that the water line in it will 

 be two and one-half to three feet below 

 the level of the returns in the green- 

 houses. Provide valves in a part of the 

 returns so they may be placed in or out 

 of commission as occasion demands, and 

 place valves on the flow and return pipes 

 of the hot water boiler, also upon the 

 pipe connecting the returns with the ex- 

 pansion tank. 



After cutting out the hot water boiler 

 the water must be drawn out of the sys- 

 tem. Air valves will be required on all 

 coils as well as facilities for draining 

 the pipes when steam is to be used. The 

 water heater will be made more efficient 

 by elevating the expansion tank in the 

 manner suggested. L. C. C. 



THREE END-TO-END HOUSES. 



I have three greenhouses, built one 

 onto the other, and wish to know how 

 to pipe them for hot water heating to 

 the best advantage. They run east and 

 west; the first, to the west, is 10x12, 

 wooden walls, open end into the sec- 

 ond house, which has three benches, 

 brick walls, and is 14x20 feet. The 

 third house is 16x30,. with three benches, 

 and a pond dividing the space with the 



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short center bench. This house has ce- 

 ment block walls, and is partitioned 

 from the second house. All have walls 

 two feet nine inches, and 10% -foot 

 ridges. The boiler-house is at the north- 

 east corner, and is 8x12 feet. 



The coldest weather I have known 

 here was 14 degrees above zero, and 

 our freezing weather is usually for about 

 fifteen days in January. I should like 

 to keep a night temperature of about 

 55 degrees, and want to carry a higher 

 temperature in the east house, which 

 will be shut off by glass partitions and 

 wall from the west section. 



If I could use the first house for 



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ferns, the second for carnations, and 

 the third for palms, etc., it would suit 

 me best. I can put the boiler as low 

 as required and use such pipe as you 

 think best. Please tell me how to rate 

 the boiler and oblige. H. B. B. 



If the ridges of these houses are the 

 same height, so the flow pipe can be 



