146 



The Florists^ Review 



FUBBUAHY 3, 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 dimensiojia_ai^ general arrange- 

 ment of the gpfSSnhouses. It is often help- 

 ful, also, to have a sketch showing the 

 location of the houses. 



' BOILEB SIZE ABOUT BIGHT. 



I have on hand a capital "Winchester 

 upright steam boiler, but have con- 

 verted it for hot water. The capacity 

 of the boiler is 1,575 square feet, and 

 the grate measures twenty-nine inches. 

 The flows and returns are 4-inch, but at 

 present are reduced to two and one-half 

 inches for the small greenhouse. I am 

 contemplating erecting a larger house, 

 25x75 feet, and should like to know if 

 the boiler is of sufficient capacity to 

 heat it and how to arrange the pipes to 

 get a temperature of 50 degrees at 10 

 degrees below zero outside. I have 

 some 2%-inch pipe and should like to 

 use 1%-inch pipe as returns. 



The walls will be seven feet high, 

 partly glass and partly wood, and there 

 are three gables exposed. The houses 

 are of standard construction, with 

 raised benches, and I grow a general 

 line of plants. D. J. — la. 



From the sketch we learn that there 

 is one house, 25x75 feet, with the boiler 

 house at the north end, and another 

 house, 25x50 feet, adjoining the larger 

 house on the west. 



Although it will only require about 

 1,250 square feet of radiation to heat 

 these houses, we should not consider 

 a boiler with a rating of 1,575 square 

 feet any too large, since a margin of 

 twenty-five per cent is always desirable. 

 The size of the grate is also about right. 



The number of flow and return ports 

 was not given, but we infer that there 

 are at least two, since it is stated that 

 the flows and returns are *4-inch. We 

 should suggest running a 4-inch main 

 flow to each house, using main returns 

 of the same size. Carry the flow pipe 

 to the smaller house along the wall. In- 

 side each of the houses we should use 

 three 2%-inch flow pipes, placing one on 

 each side wall-plate and the other three 

 feet under the ridge. Each flow should 

 supply a coil of four 1%-inch returns, 

 except that there should be five returns 

 in the coils on the exposed wall of each 

 house. 



PIPING PENNSYLVANIA HOUSE. 



Will you kindly tell me the rating or 

 oap.acity of a hot water boiler, and the 

 size and amount of pipe necessary to 

 heat two greenhouses, one 16x100 and 

 the other 20x100 feet? A cement wall 

 extends eighteen inches above ground, 

 with three feet of glass on each side. 

 The houses are connected, without a 

 dividing wall. Also inform me regard- 

 ing a house 15x50 feet, with a 4-foot 

 cement wall extending to the eave 

 plates. It is separated from the other 

 houses by twelve feet of space and 

 runs parallel with the other two houses. 

 All are protected by sheds on the north. 



WHEN YOU BUY-arr A KROKSCHELL 

 "THE BOILER OF UNEQUALED FUEL ECONOMY" 



R^ROf' GRE^^ H0U5E 



BOILER 



.o. 



^iL^ft HOT V^P^ 



KROESCHELL BOILERS will give record 

 breaking service this Winter. 



TELEORAPH 



ORDERS at: 



OUR EXPENSE 



Neither in tlie Eastlor West, ner the North or South has any other 

 make of boiler ever equaled the performance of the Kroeschell— 

 installed for 3,974.608 square feet of class in 1916-1917. Every 

 customer immensely satisfied. The hich efficiency and low cost of 

 operation make the Kroeschell the best of all boilers for Florists' use. 



KROESCHELL BOILERS have satis 

 factorily and permanently solved the 

 eflFective burning of screenings. They 

 will burn the worst grades of coal, 

 even the dirtiest culm or sawdust and 

 wood refuse. 



Greenhouse owners like the KROES- 

 CHELL because of its extreme sim- 

 plicity and freedom from trouble. As 

 a fuel saver, it pays its own way. The 

 KROESCHELL- will increase your 

 heating plant efficiency 20 to 40%. 



The KROKSCHELL has proven its worth in many of the large establish- 

 ments in tliis country. It has frequently been selected by the most care- 

 ful buyers in competition with all other types of boilers. Its efficiency 

 and capacity are completely beyond any other boiler. 



NOTE 



We are still offering a limited number of trial 

 packages of Z-I-N-C-O, the wonderful soot de- 

 stroyer. Have you ordered your supply? The 

 quantity is limited. The price is $3.00. If you 

 have soot trouble order a trial package at once. 



KROESCHELL BROS. CO., 



444 W. Erie Street 

 CHICAGO, ILL. 



