no 



Greenhouse Heating 



SuBSCRiBBBS 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. 



SIZE OF HEATER NEEDED. 



Will you please tell me the size 

 of the water heater which I would need 

 in order to heat a greenhouse 25x50 feet 

 in size and containing 2,000 square feet 

 of glass f On one side there is a cement 

 wall four feet high and on the other three 

 sides there are cement walls three feet 

 high. I desire to heat the house to a 

 temperature of 50 degrees when there 

 is an outside temperature of 20 degrees 

 below zero. What size of pipe would 

 be best to use, considering the fact that 

 I plan to make an addition of about 

 fifty feet later ont C. A. P. — Me. 



For the house described it would be 

 advisable to use a hot water heater 

 rated at about 950 square feet of radia- 

 tion and with a grate about twenty- 

 five inches in diameter. However, if it 

 is to be doubled in size within two or 

 three years, it will be advisable to 

 install at this time a heater which will 

 be able to handle the house after it 

 is enlarged. This will mean a heater 

 rated at about 1,700 square feet of 

 radiation. 



For the radiating surface, which will 

 not require any change when the house 

 is enlarged, it would be advisable to 

 use five 2^ -inch flow pipes, placing 

 one under the ridge, one under each side 

 wall plate and the other two on the 

 purlin posts. There should be five coils, 

 each containing three 2-inch return 

 pipes. 



The main supply pipe, with which the 

 flows are connected, should be a 5-inch 

 pipe, or two 4-inch pipes may be used. 

 The main return pipe or pipes should be 

 of the same size. Run the flows and the 

 returns' downhill and connect the expan- 

 sion tank with the highest part of the 

 system. 



ADDITIONAL HOUSES. 



I have three greenhouses, which are 

 each 1414x75 feet in size. They are 

 heated with hot water and have a 4- 

 inch main flow and a 4-inch main re- 

 turn. Each house has two 2-inch flows 

 and four li^-inch returns. I am going 

 to build two more houses adjoining 

 these three. The size of the new houses 

 will be 22x75 feet. I am going to dou- 

 ble the amount of pipe in each house. 

 Will the 4-inch main flow and return 

 carry the additional water? Colo. 



As nearly as we can estimate from 

 the data given, the three houses, 14i^x 

 75 feet, have nearly 800 square feet of 

 radiating surface, including the mains. 

 The new houses, if each one contains 

 twice as much as each of the present 

 houses, will have about 1,050 square 

 feet. This makes a total of 1,850 square 

 feet of radiation in all five of the 



The Rorists' Review 



JUMB 2, 1921 



CHICAGO'S LEADING ; 



PLANT ESTABLISHMENT ! 



THE FAMOUS OECHSLIN PLANT 

 100.000 SQ. FT. OF GLASS-HEATED BY KROESCHELL BOILERS 



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Mr. Oechslin's greenhouses are the show place of Cbicaso. and visitors are 

 always welcome. Go and see this wonderfulrange and when you admire 

 the perfection of the plants and the cleanliness of the place, remember to 

 visit the boiler rooms and note that the name KROESCHELL is found on 

 every one of the boilers. 



H 

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WHIN YOU BUY- 



arr a kroeschcll 



THE KROESCHELL 

 SAVES COAL AMD LABOR 



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OECHSLIN'S FINE PLANTS AT NATIONAL FLOWER SHOW 



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 CHICAQO, ILL. 



KROESCHELL BROS. CO., ****"" •*"" 



