144 



The Florists' Review 



Jaboabx IX 1922 



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 de- 

 •ired 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. 



GETTING PEOPEB HEAT. 



I am planning to erect a greenhouse, 

 10x70, in northwestern Wisconsin and I 

 desire to heat it to 60 or 70 degrees in 

 the coldest weather. My idea is to use 

 a Wilks heater. One gable of the house 

 will be exposed and the potting shed, 

 etc., will be at the other end. What 

 size of flow pipe will be necessary and 

 what arrangement and what sizes of 

 returns will be required! The first half 

 of the house will be used for potted 

 plants and the other half for snapdrag- 

 ons and carnations. There will be three 

 feet of glass in the side walls. 



^ D. M.— Minn. 



Nothing is said regarding the lowest 

 winter temperature, but it is presumed 

 that it will be not less than 30 degrees 

 below zero, with a possibility of even 40 

 degrees below. Particularly for the class 

 of plants mentioned, it would seem un- 

 necessary to carry 60 or 70 degrees. 

 This would not only make the cost of 

 installing the heating plant needlessly 

 high, but the fuel consumed would be 

 at least twenty-five per cent more than 

 for a temperature of 50 degrees as a 

 minimum, and this would seem ample. 



For 50 degrees it would be advisable 

 to use two 2y2-inch flow pipes on the 

 plates and eight 2-inch returns under 

 the side benches. For a minimum of 60 

 degrees it would be advisable to use two 

 3-inch flow pipes and ten 2-inch returns. 

 For 65 to 70 degrees the number of the 

 returns should be increased to at least 

 twelve 2-inch pipes. The flow pipes 

 should run downhill and the main re- 

 turns should have the same capacity as 

 the main flow pipes. 



PLACE FOB EXPANSION TANK. 



Some time ago I wrote to you for in- 

 structions concerning a heating problem 

 and you immediately replied, but your 

 instructions were incomplete. Will you 

 kindly tell me whether to run the pipes 

 uphill or downhill and where to place 

 my expansion tankt One plumber tells 

 me to put the tank at the far end of the 

 house and another tells me to put it near 

 the boiler, connecting it with the re- 

 turns. J. H. M.— Md. 



While fairly good results can be ob- 

 tained by having the flow pipes run up- 

 hill and the expansion tank attached 

 either to one of the flows at the 

 farther end of the house or to one of the 

 return pipes near the boiler, it is not 

 advisable to adopt either of these 

 methods. 



In the previous reply to your ques- 

 tions no mention was made of the flows 

 or the place for connecting the expan- 

 sion tank because we have frequently 



What you get 



when you get 



a Kroeschell 



A Steel Plate Boiler. 



A better boiler than a cast iron boiler. 



A boiler that will not craick. 



A boiler that will outlive any other. 



A boiler that burns the lowest grades of coal efficiently. 



A boiler that will give you complete control of temper- 

 atures in your greenhouses. 



A boiler that will save you many tons of coal every season. 



A boiler that is used more for greenhouse heating than 

 any other boiler. 



A boiler at a reasonable, direct-from- factory-to-user price 

 (we have no agents). 



A boiler that has proved itself the best for greenhouse 

 heating by years of satisfactory service in the largest 

 greenhouses. 



A boiler that is most highly praised by expert growers 

 everywhere. 



A boiler that will increase your profits by helping you 

 grow more and better flowers with less expense. 



And— 



You can get any size Kroeschell Boiler at once. Tel- 

 egraph or telephone your order at our expense. Long 

 distance phone Superior, 8680; ask for Greenhouae 

 department. 



KROESCHELL BROS. CO. 



444 W. Eri* Street 



CHICAGO, ILL. 



