132 



The Florists^ Review 



Fbbbdabt 9. 1922 



V 



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 tempera- 

 tures should be stated in the inquiry, as 

 well as the amount of glass in the side 

 walls, and the dimensions and general 

 arrangement of the greenhouses. It is 

 often helpful, also, to have a sketch 

 showing the location of the houses. 



INSURING GOOD CIRCULATION. 



I have one liouse 30x90 feet. Will 

 you kindly advise me how many 2-inch 

 returns will be required to take care of 

 two 2Vi-inch flow pipes? How much of 

 a fall should the returns have in the 

 ninety feet to insure good circulation? 

 The feed pipes run down the middle of 

 the house and the returns run along 

 the side walls. There is no glass in the 

 side walls. F. S.— Pa. 



The question reads, "How many 

 2-inch returns will be required to take 

 care of two 2Vi>-incli flow pipes." In 

 working out heating problems, the num- 

 ber of flow pipes required will depend 

 upon the amount of radiation neces- 

 sary. For heating a house 30x90 feet, 

 use four 2-inch returns with each 2%- 

 inch overhead flow pipe, although fairly 

 good results could be secured with one 

 flow for six returns. 



In a house of the size mentioned, 

 about 50 degrees could be secured, when 

 10 below zero, with two 2i/{.-inch flow 

 pipes and twelve 2-incli returns. The 

 results, however, will be much more 

 satisfactory and the amount of labor 

 and fuel necessary will be reduced con- 

 siderably if three flows and twelve re- 

 turns are used. With this rndintion it 

 should be possible to secure 5.1 degrees 

 in zero weather. With four flows and 

 fourteen or fifteen returns, GO to 6.'5 

 degrees would be readily obtniiiod when 

 it is 10 below zero, if there is no glass 

 in the side walls and the house is well 

 built. 



ALTERING HEATING SYSTEM. 



. I have sent a sketch of my green- 

 houses, in which I have a great deal of 

 trouble in maintaining heat. I desire 

 to maintain n temperature of 52 degrees 

 in houses Nos. 1 and 2, and a tempera- 

 ture of ')') degrees in house No. 3, as 

 shown in the sketch. I have no trouble 

 with house No. 3, but .'im unable to carry 

 over 45 degrees in extreme weather. I 

 have a 25-foot chimney and two of the 

 houses, as can be seen, are three feet be- 

 low the surface. In the flow line for the 

 latter two houses there are six ells and 

 two tees, with two high points. Would 

 it be advisable to raise the two flow 

 lines and leave the two returns where 

 they are? If the returns are raised, it 

 will require rebuilding the houses. 

 Would this pay? H. G. H.— Kan. 



It is noted in the above letter: "I 

 have no trouble with house No. 3, but 

 am unable to carry over 45 degrees in 

 extreme weather." This leads one to 

 think that the entire sentence refers to 

 house No. 3, were it not that in another 

 part of the letter the statement is made 

 that "a temperature of 55 degrees is 



Wrigley Building, Chicago. 



Kroeschell, To Be Sure 



To the many wonderful things of which Chicago boasts, there 

 has been added recently the Wrigley Building. It is one of 

 the largest office buildings in the city, and one of the most 

 beautiful to be found anywhere. Its design and construction 

 is perfect thioughout. 



In such a large building, where there are hundreds of offices, 

 where the health and comfort of thousands of people must be 

 guarded, the heating system plays a part of tremendous im- 

 portance. This was realized by the designers of the Wri|fiey 

 Building, and the greatest care was taken in making specifi- 

 cations for the heating system. Two 250-horsepower Kr**- 

 scbell Boilers were installed for heating the entire building. 



In selecting a boiler for your greenhouses, get the boiler that 

 has proved itself the most efficient in every way for greenhouse 

 heating. j^ Get a Kroeschell and know you have the best. 



No Delay 



We anticipated a rush of orders this winter that will 

 require quick service, and we are prepared to ship any size 

 boiler at once. Telegraph or telephone your order at our 

 expense. Long distance phone, Superior 8680. Ask for green- 

 house department. You will get your boiler without delay. 



KROESCHELL BROS. CO. 



444 W. ErI* Str«*t 



CHICAQO, ILL. 



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