

••:■,■,"■, .-7^*. ■■rr-v^ Trnj- 



122 



The Florists' Review 



Jdni 22. 1922 



GreenhoBse Heating 



SuBSCsiBEBS are invited to write the 

 editor of this department with regard to 

 any details of gfreenhouse heating that are 

 not understood. When information ia de- 

 sired regarding the capacity of boilers, 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. 



ENl^ABOING SYSTEM. 



I have mailed you a sketch of my 

 greenhouse, which is 21x50 feet. There 

 are three feet of cement and thirty 

 inches of glass in the side walls. Ar- 

 rangement of the beds is shown on the 

 sketch. I am going to build a boiler 

 house. Can you give me some idea as to 

 how large the hot water boiler will be 

 required to be in order to heat the above 

 house and an additional house, 21x50 

 feet? The temperature desired is about 

 o5 to 60 degrees. What arrangement 

 should be iisi'd for the pipes? 



J. L.— Mich. 



For heating the two houses described 

 above, it would be advisable to use a 

 boiler rated at 2,000 to 2,200 square 

 foot of radiation. This will require a 

 smoke flue ten inches in diameter and a 

 chimney with an inside diameter of 

 twelve inches. 



It would be preferable to use in each 

 of the houses three 214-inch flow pipes 

 and twelve 2-inch returns. Carry one 

 flow on each side wall plate and the 

 other under the ridge. Four of the re- 

 turns may be on each "wall and the 

 others in the walks between the beds. 



If the flows run downhill, and the 

 highest point in the main flow pipe is 

 connected with the expansion tank, 

 there will be no occasion for using air 

 valves. There should be a gate valve 

 on each of the flow pipes, in order to 

 control the heat. 



TWO BOILERS VS. ONE. 



Will you kindly state the capacity of 

 a boiler that is required to heat the 

 following to 50 degrees, when outside 

 it is 10 degrees below zero: Four green- 

 houses, 28x160, and two, 20x160, with 

 three and one-half feet of glass in the 

 south wall and twenty inches in the 

 north wall? 



The houses run east and west and 

 the boiler room is located at the north- 

 west corner of the range. At present 

 we have a 40-horsepower boiler for one 

 house, 128x160, and another, 20x160. 

 Would it be advisable to buy another 

 40-horsepower boiler, or would it be 

 preferable to buy one new boiler to 

 heat the entire place ? Will you ex- 

 plain what the best plan would be, men- 

 tioning sizes of returns, flow pipes, etc.? 

 A. C— 111. 



Each of the wide houses will require 

 about 650 square feet of radiation and 

 the narrow houses should have 400 

 square feet for 50 degrees, with 100 

 additional feet in the house with three 

 and one half feet of glass in one side 

 wall, and fifty extra feet for the house 

 with twenty inches of glass. 



While it would be possible to heat the 

 .<>ix houses economically with a 60- 



KROESCHELL 



''The Boiler of Unequaled Fuel Economy'' 



For fuel economy there is no bet- 

 ter boiler than the Kroeschell High 

 Pressure Steam Boiler. It burns 

 the lowest grades of coal, requires 

 less, and gives more heat. 



Kroeschell Boilers can be depended 

 on at all times. They insure con- 

 ditions necessary for raising the 

 highest grade stock. The profits 

 of hundreds of growers have been 

 increased by raising better stock 

 with less fuel in houses heated by 

 Kroeschell Boilers. 



Order a Kroeschell Boiler now for 

 delivery during the summer or in 

 the fall. 



EncinaarinK Advics and Quata- 

 tiena chaarfully BHbmittad— 

 Lat ua knaw yaur raquiramanta 



KROESCHELL BROS. CO., 



444 W. Eri« Str««t 



CHICAQOp ILL. 



