132 



The Florists^ Review 



Dbcembbk 2, 1920 



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. 



PIPINQ THBEE SECTIONS. 



I am enclosing a drawing of a house 

 I wrote you about some time ago. Ex- 

 perts on double glass construction have 

 figured the radiation required at 537 

 square feet. I have a 15-horsepower Tee 

 boiler, rated at 2,000 square feet, which 

 I shall use for heating. I have planned 

 to put coils of eight IMi-inch pipes along 

 both concrete walls at the north end, 

 forming a heart at the northeast and 

 northwest corners and running the full 

 length of the east and west walls, bring- 

 ing the 2-inch returns to the middle of 

 the south end and returning through a 

 4-inch pipe in the center sunken path 

 to the boiler. Are the sizes for return 

 pipes right? 



I thought of using 1%-inch pipe under 

 the benches in section 1. To heat for 

 rooted cuttings, how many will be re- 

 quired! All three sections open into one 

 big room under the gutters. Section 1 

 will contain all the benches and will 

 require a little higher temperature 

 than the other two sections. Planting 

 in sections 2 and 3 will be in ground 

 beds. I do not want to run the pipes 

 so as to obstruct the light. 



How shall I place the rest of the radia- 

 tion required? I am planning to run a 

 4-inch flow from the boiler to a point 

 just inside section 1 and then branch 

 through a tee, using 2-inch pipes down 

 to the coils running along the north wall 

 to the east and west walls. I cannot 

 handily run the flow to the south end and 

 returns along the outside wall, because 

 the gutters are only five feet high, ex- 

 cept on the north side of section 1. 

 The flow would be so low that it would 

 interfere with walking through the 

 house. W. N. L.— 0. 



From the sketch one learns that there 

 are three houses, 11x45 feet, running 

 east and west, with five feet of glass in 

 the south wall of the south house. The 

 two end walls are of concrete and the 

 north wall of the north house is built 

 against the workroom and boiler house, 

 with the boiler opposite the middle of 

 the house. The only entrance in the 

 house is from the boiler room. 



The method of heating to be used is 

 not stated, but from the amount of radia- 

 tion mentioned, I infer it is hot water, 

 provided 60 degrees will answer for sec- 

 tion 1 and 55 degrees for sections 2 and 

 3. 



While a 4-inch main flow pipe will 

 be all right, 3-inch would be better for 

 the branch flow pipes. Run these to the 

 northeast and northwest corners respect- 

 ively of the north house and then take 

 off 2%-inch pipes with which to supply 

 four 1'4-iiich return pipes to run to 

 the middle of the house from the east 

 and west ends. Run the coils under the 

 north propagating bench. 



"Ain't it a Grand and Glorioua Femling?" 



Heat Your Houses with 

 Kroeschell Boilers 



YOU'LL BE HAPPIER 

 YOU'LL BE RICHER 



TO THE MAN WHO NEEDS A BOILER 



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CAN SHIP 

 ANY SIZE 

 AT ONCE 



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asT 



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ORDERS AT 



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The KROESCHELL has proven its worth in many of the large establishments in 

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WHEN YOU BUY - GET A KROESCHELL 



KROESCHELL BROS. CO., 



444 W. Erie Straet 

 CHICAttO, ILL. 



