134 



The Rorists^ Review 



OOTOBIB 13, ld21 



Greenhouse Heating 



SiTBSCBiBERS 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 

 helpful, also, to have a sketch showing 

 the Wcation of the houses. 



BETUBNS AND COILS. 



What is the diflPerence between re- 

 turns and coils? H. F. E. — Ind. 



The term ' ' coils ' ' is applied to two 

 or more pipes connected by means of 

 headers. It is preferable in most cases 

 to run the flow pipes overhead to the 

 farther end of the house and there join 

 them to the return pipes. 



HEATING SINGLE HOUSE. 



From the sketch of my greenhouse 

 sent you, will you advise me as to how 

 I should arrange the pipe to heat to 

 60 degrees with steam? What size of 

 pipe will be needed? H. F. R. — Ind. 



From the sketch it is learned that the 

 house is 17x50, with twenty inches of 

 glass in one side wall. The rest of the 

 4-foot walls is of concrete. There is a 

 raised bench along each side wall and a 

 solid bed in the middle of the house. 



For heating the house it would be ad- 

 visable to use two 2-inch flow pipes, 

 locating them on the purlin posts or at 

 the side wall plates, if desired, with 

 nine 2-inch returns in two coils, placing 

 the larger number of pipes on the side 

 with the glass. 



FOB HIOH-PRESSUBE STEAM. 



We are completing a greenhouse, 20x 

 350 feet, with solid benches for carna- 

 tions. The heating system will consist 

 of a high-pressure steam boiler, cen- 

 trally located. What size of flow and re- 

 turn pipes and how many will be 

 needed? The minimum temperature to 

 be maintained will be 60 degrees in a 

 climate similar to that of Chicago and 

 vicinity. B. F. L. — Can. 



For a house 20x350 feet it would be 

 advisable to use one 3-inch main flow 

 pipe. From the description, it is under- 

 stood that the boiler will be located op- 

 posite the middle of the house. The 

 main flow pipe should be divided at 

 that point and a 2%-inch flow pipe car- 

 ried in each direction to the ends of the 

 house, where they should be connected 

 with the coils. The coils should be 

 located on the sides of the walls. If 

 more convenient, two 2-inch flows may 

 be substituted for each of the 2i^-inch 

 flows. These may be carried either on 

 the side wall plates or on the purlin 

 posts. The pipes for the coils should 

 be 1%-inch, and the number will de- 

 pend upon the amount of glass in the 

 walls and the construction of the house. 

 A well built house without glass in the 

 walls will require three pipes in each 

 coil, but for two and one half or three 

 feet of glass in each end wall an addi- 



Uncle Sam's Greenhouses 



When Uncle Sam builds a greenhouse he is mighty 

 particular about how it is built and what goes into 

 it. He employs the best brains available to develop 

 and maintain the departments of the government 

 where botanical and horticultural research and 

 experiments are conducted. 



Merit alone is responsible for the selection of 

 Kroeschell Boilers for heating the Conservatories of 

 the President, the Plant Introduction Garden of the 

 Department of Agriculture, the U. S. Propagating 

 Gardens and many other government houses all 

 over the country, too numerous to mention in 

 this space. 



Where there are rigid requirements, Kroeschell 

 Boilers are invariably picked to fulfill them, because 

 a highly successful service performed for years has 

 made Kroeschell Boilers stand far above all other 

 boilers. 



Install a Kroeschell Boiler in your greenhouses, 

 and it will not be long before you realize why mil- 

 lions upon millions of feet of glass are heated by 

 Kroeschell Boilers. 



We Can Ship Any 

 Size Boiler At Once 



Telegraph or telephone 

 your order at our expense. 

 Long distance phone, 

 Superior 8680. Ask for 

 greenhouse': departm en t. 



KROESCHELL BROS. CO. 



444 W. Eri* Str««t CHICAOO, ILL. 



