144 



The Florists^ Review 



Mabch 16. 1922 



Greenhouse Heating 



DETEBMININa RADIATION. 



How much radiation is there in a 

 length of 2-inch pipe ten feet long and 

 in a 1^-ineh pipe ten feet long? 



I. M. D.— Wis. 



While there is a slight variation in 

 the circumference of black pipe, it is 

 customary to estimate this pipe at .621 

 of a foot for 2-inch and five-tenths 

 of a foot for 1%-inch pipe. This would 

 make the radiating surface of ten feet 

 of pipe 6.21 feet and five feet respec- 

 tively for 2-inch and 1%-inch pipe. 



HEATING LABQE RANGE. 



I have mailed you a sketch showing 

 the plan of our range. There are six 

 houses of the dimensions as given on 

 the sketch. Would you advise using 

 one or two boilers to heat this range? 

 We wish to raise the temperature to 60 

 degrees in weather which is below zero. 



C. H. B.— Neb. 



One 50-horsepower boiler will answer 

 for heating the six houses. The follow- 

 ing arrangement will be suitable for the 

 piping of the houses: Use one 2-inch 

 overhead flow and twelve 1%-inch re- 

 turn pipes for the house 26x70 feet, 

 with three feet of glass in one side wall. 

 For the house 24x70 feet, one flow and 

 seven returns will be sufficient. Use one 

 flow and eight returns for the house 

 21x40 feet. Use one 1%-inch flow and 

 four returns in the house 10x26 feet. 

 For the house 18x70 feet, with three 

 feet of glass in one wall, use one 2-inch 

 flow and nine returns. For the house 

 35x138 feet, with three feet of glass in 

 all sides, use three 2-inch flow pipes and 

 fourteen returns. 



GETTING ADEQUATE HEAT. 



I have purchased some property, upon 

 which there is a greenhouse, the heating 

 of which is not adequate. I should ap- 

 preciate suggestions. The house is 20x 

 112, runs north and south, and has the 

 south end glazed. The north end adjoins 

 the boiler room, garage, etc. The walls 

 are five feet high, with twenty-four 

 inches of glass. The house is twelve 

 feet to the ridge. The boiler, hot water, 

 is west of the center of the house. At 

 present there is a 3-inch flow three feet 

 below the ridge, with a coil of five 1%- 

 ineh pipes from a header on each side 

 wall. I desire a temperature of 55 

 degrees in zero weather. It might be 

 added that the boiler is on a level with 

 the ground and that electricity is avail- 

 able. Would forced circulation be ad- 

 visable! If so, how large a pump would 

 be required? How would centrifugal or 

 valve pumps answer? The house is fairly 

 well protected in all directions. 



H. W.— 0. 



Nothing is said regarding the size 

 of the boiler and it is possible that one 

 reason for the unsatisfactory results 

 is that the boiler is too small for the 

 amount of glass to be heated. From the 

 description of the range there are ob- 

 served two and, probably, three reasons 

 for the inadequate heating of the house. 

 One is the size of the return pipes, as 

 2-inch returns would be preferable in 

 a house of the length stated; second, 

 about four more returns should be used 



Good Judgment in 

 Buying a Boiler 



C. H. Totty 



For many years C. H. Totty 

 has used Kroeschell Boil- 

 ers. He expresses great 

 satisfaction with the service 

 of his boilers and highly 

 commends the efficiency of 

 Kroeschell Boilers in green- 

 house heating. 



Good judgment based on experience is 

 what makes successful business and, 

 naturally, the more capable a man is of 

 using good judgment and the greater 

 his power of utilizing his experience 

 and the experiences of others in exer- 

 cising his judgment, the greater will be 

 the success of his business. 



It is impossible to believe that the 

 judgment of a man that is responsible 

 for the establishment of a large, per- 

 manently successful greenhouse busi- 

 ness is anything but good. It is sensi- 

 ble to let the judgment of the big men 

 in the flower business guide you in 

 making decisions for your own flower 

 business. 



Merit alone is responsible for the favor- 

 able opinion of Kroeschell Boilers that 

 prevails among the largest and most 

 successful growers. They select 

 Kroeschell Boilers for their heating 

 problems and recommend them for all 

 growers, large and small. You can 

 make no mistake by installing a boiler 

 in your greenhouses that has gained 

 the favor of men whose success in the 

 greenhouse business qualifies them as 

 experts in knowledge of greenhouse 

 requirements. 



We Can Ship 

 At Once 



any size boiler you need. We have a 

 complete stock of all sizes and styles. 

 Telegraph or Telephone your order to 

 us at our expense; Long Distance 

 'phone Superior 8680; ask for Green- 

 house Department. 



KROESCHELL BROS. CO., 



444 W. Erie Street 



CHICAGO, ILL. 



