118 



The Florists^ Review 



JcNB 9, 1921 



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 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. 



HEATING WITH EXHAUST STEAM. 



Practical and Profitable. 



There are many advantages in heat- 

 ing greenhouses with exhaust steam, 

 among which are the lessening of the 

 danger of fire, the relief from the labor 

 of firing and the removal of the cinders, 

 and the securing of greater regularity 

 in the hetxting. Where continuous serv- 

 ice can he had from a power plant near 

 by, this method of greenhouse heating 

 is, at reasonable rates, a profitable one. 



A flat rate per thousand square feet 

 of glass or of radiation is sometimes 

 given, but the cost of heating varies so 

 much in different years, and according 

 to the condition of the glazing and the 

 character of the exposure, that no gen- 

 eral estimate can be given on this basis. 

 The method of determining the charge 

 for heating used by most central heat- 

 ing plants is to base it upon the weight 

 of the condensed water which is re- 

 turned from the greenhouse coils, de- 

 termined by a self-registering condensa- 

 tion meter. 



The exact amount cliarjjcd for the 

 service varies with the cost of fuel at 

 the given point, as well as with the 

 amount of steam used. Tlius, where 

 fuel is cheap and where a large amount 

 of steam is required, the charge may 

 be as low as 4(i or 45 cents per thousand 

 pounds of condensation. On the other 

 hand, the charge may be as much as 75 

 or 80 cents per thousand pounds of 

 condensation where the cost of coal is 

 high and the greenhouse space is small. 

 In some sections it may be even more 

 than this. There has been a marked 

 advance in the charges during recent 

 years, owing to the high prices of fuel. 

 Ordinarily, the company owning the 

 heating plant makes the connection, 

 charging nothing for piping to the curb 

 line, and asking the actual cost for 

 labor and material for connecting with 

 the ste&m mains inside the greenhouse. 



If there is a small and. preferably, 



WHEN Y«U BUY-QET A KR0E8CHILL 

 'THE BOILER OF UNEQUALID FUEL ECONOMY" 



Expressions From Men Who Know Boilers 



PLACE YOUR ORDER AT ONCE 



KROESCHELL BROS. CO., 



444 W. Eri* Str««t 

 CHICAGO, ILL. 



