92 



The Florists' Review 



Fbbbuabt 27. 1919. 



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. 



HAKD COAI. OB FX7EL OIL? 



I have two greenhouses, one of them 

 25x60 and the other 11x40. At present 

 they are heated by a Burnham boiler, 

 No. 624, with hard coal as fuel. From 

 the data you have on hand, can you tell 

 me whether fuel oil would bo more eco- 

 nomical? W. E, J.— N. Y. 



We have no exact data regarding the 

 cost of fuel oil in eastern New York, 

 but would judge that the oil would cost 

 nearly twice as much as the coal. To 

 this should be added the expense of put- 

 ting in a storage tank and the necessary 

 piping, burner and other equipment for 

 using the oil. In a large plant where oil 

 would be purchased by the carload, the 

 price of tho oil would be considerably 

 reduced, but there would then be the 

 cost of a large storage tank, tank 

 wagon, etc. 



On the other hand, some allowance 

 should be made for the saving of labor 

 in firing^ removing ashes, etc., as well 

 as the lessening of the soot, but we 

 doubt whether any change will be de- 

 sirable. 



CAPACITY OF BOIU;^. 



I have a Kewanee fire-box boiler, 

 containing forty-eight flues, each six 

 and one-half feet long and two and 

 three-fourths inches in diameter, inside 

 measurement. The fire-box is forty-six 

 inches square, with grates the same 

 size. The smoke is returned through the 

 top of the boiler. How much glass 

 should this boiler heat when the outside 

 temperature is 15 degrees below zerof 



D. K.— Mich. 



Before giving a definite answer to the 

 question of D. K. there are several mat- 

 ters that should be considered. In the 

 heating of a greenhouse much depends 

 upon the condition of the glazing, as 

 there will be a saving of twenty-five per 

 cent in the amount of heat required in 

 a house with all of the cracks filled with 

 putty and paint, as compared with one 

 where they are open. 



Much will also depend upon the 

 amount of exposure to the prevailing 

 cold winds. Fully ten per cent can be 

 saved by having potting and service 

 rooms, or other buildings, on the north 

 and west (or whatever direction the 

 cold winds come from). Last but not 

 least, the area of glass that can be cared 

 for by a given boiler will depend upon 

 the temperature to be maintained, as 

 twenty-five per cent more can be heated 

 to 50 degrees than can be carried at 

 60 degrees. 



Before determining just how large a 

 boiler will be most economical for a 

 gpven greenhouse range, it is well to 

 know about how many times the ther- 



aDaaoDaaaDaaDaaDDDaaaaaaa dd 



a 



D 

 O 

 D 



a 

 a 



D 



a 

 a 

 a 



D 

 D 



a 



D 



a 



a 

 a 

 a 

 a 



D 



a 



D 



a 

 a 

 a 



D 

 D 

 D 



a 



D 



o 



D 

 D 

 D 



a 



D 



a 

 a 



D 

 D 



n 

 a 



D 



a 

 a 

 a 



D 



a 



D 

 D 

 D 



a 



D 

 D 



a 

 o 



KROESCHELL 



GREENHOUSE SPECIALTIES 



NOT 

 CAST 

 IRON 



NOT 



CAST 



IRON 



Made in 20 Sixes 



HEATING and COOLING are two branches of engineerinK on 



which wr specialize for ihe greenhouse trade. 



Over th'rty years have been devotpd by us to thn construction and 



des'Rning of boilers and refrigerating apoaratus. 



During this period we have furnished and in:jtalled heating and 



cooling systems for the most successful greenhouse men in this 



country. 



Tubeless Boiler 



Steam 



KROESCHELL Boilers are making the most wonderfnlgreenhonse 

 heating record in Ihe world. Florists who have u-ed other makes 

 are constantly giving the KROESCHELL the highest praise. 



KROESCHELL: 



i^iRt icWATERTUBt 



BOILER. 



The Hiff*^ Pressure Kro^schell— a highly efficient unit for steam 

 plants 100 H. P. and over. 



13,468, 20 to. ft. of class was equipped with KROESCHELL Boilers 

 during the past five years. 



Water Tube Steam Boiler 



Whpn in nepd of refrigeration investigate the Kroeschell System- 

 its high pffioiencv and low cost of operation place the Kroes« hell 

 System of Refiigeration in the foremoat rank for greenhouse use. 

 Our system uf K-frigeration and C oling is easily installed— per- 

 fee control of tempera ure and absolute safety insured- no am- 

 monia used for this system. 



Safety 



CO, 



Ecoaomy 



No 



Ammonia 



Used 



iSend for Boiler or Ire Machine Catalogues. 

 State which is wanted. 



BUY DIRECT-FACTORY TO USER PRICES 



KROESCHFIL BROS. CO. 444 W. Erie street, 



KROES.HELL BROS. ICE MAlH. CO. Chicago, ill. 



aaaaa aaoDaaaaaaaDoaaaaaaa 



c 



D 

 D 

 O 

 O 

 O 

 D 

 D 

 O 

 D 

 D 

 D 

 D 

 D 

 D 

 D 

 D 



a 



Q 



a 



D 



a 

 a 

 o 

 a 

 o 

 o 

 a 

 a 

 a 

 a 

 o 



D 



o 

 o 

 o 

 a 



o 

 a 

 o 

 a 



o 

 a 

 a 

 a 

 o 

 a 

 a 



D 



O 



o 

 a 



Q 



a 

 a 



D 



a 



