128 



The Rorists* Review 



September 29, 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 

 helpful, also, to have a sketch showing 

 the location of the houses. 



THE MEANING OF "GLASS AREA." 



In speaking of a greenhouse having 

 5,000 feet of glass is it meant that 5,000 

 square feet of glass is used on it or does 

 it mean tliat the foundation encompasses 

 5,000 square feet of surface? 



G. E. S.— N. J. 



Particularly in figuring the radiating 

 surface of a greenhouse, the actual 

 amount of exposed glass must be known, 

 as well as the amount of exposed wall, 

 and whether the latter is of wood, con- 

 crete or brick. This will show what is 

 meant usually by "square feet of 

 jjrlass. " 



rOE, TWO GREENHOUSES. 



I am building two houses, one of 

 which is L'0xl25, six feet five inches 

 to the plate and fourteen feet to the 

 ridge. The other house is 28x100, six 

 feet five inches to the plate and I 

 am not certain how high it is to the 

 ridge, as I am moving the house here 

 from Muncie, Ind. My boiler is sec- 

 tional and has a radiation of about 5,000 

 feet. It has a 10-inch outlet for steam 

 and two 4-inch inlets. According to the 

 plan sent, how would you advise me to 

 choose the pipes, flows, returns, etc.? 



B. A. A.— Ind. 



In the longer house use three 2 1^ -inch 

 flow pipes and nine 2-inch returns, plac- 

 ing one flow on each side and the other 

 four feet below the ridge. Three re- 

 turns may be used in each coil or four 

 may be placed along the exposed wall, 

 two in the center and three at the back 

 wall. 



Por the house twenty-eight feet wide, 

 four 2% -inch flow pipes will be desir- 

 able, running tlicni on the wajl plates 

 and purlin posts, with twelve 12 inch re- 

 turn pipes. The sketch also shows a 

 house, L'5xl2o, the construction of which 

 is contemj)lated. For this it would be 

 advisable to use four flows and eleven 

 returns. 



ARRANGEMENT OF PIPES. 



1 am ciuldsing a sketch of a green- 

 house, for the heating of which I should 

 like your advice. It is to be heated 

 with hot water to 55 or 60 degrees when 

 it is 10 degrees below zero outside. The 

 house is L'Uxr)0 feet and fourteen feet to 

 the ridge. There is a 5Vi!-foot side wall, 

 with thirty-two inches of glass. 



As shown in the plan, the house is ex- 

 posed only on the south end and west 

 side. I have nine lengths of li/^-inch 

 pipe and one length of 1 inch pipe, 

 which I should like to use. There will 

 be two raised benches .*ind one side 

 bench on the ground. I desire to have 

 most of the pipes on the side walls and 

 would prefer pipe only under the center 



Wrigley Building, Chieago. 



Kroeschell, To Be Sure 



To the many wonderful things of which Chicago boasts, there 

 has been added recently the Wrigley Building. It is one of 

 the largest office buildings in the city, and one of the most 

 beautiful to be found anywhere. Its design and construction 

 is perfect throughout. 



In such a large building, where there are hundreds of offices, 

 where the health and comfort of thousands of people must be 

 guarded, the heating system plays a part of tremendous im- 

 portance. This was realized by the designers of the Wrigley 

 Building, and the greatest care was taken in making specifi- 

 cations for the heating system. Two 250-horsepower Kroe- 

 schell Boilers were installed for heating the entire building. 



In selecting a boiler for your greenhouses, get the boiler that 

 has proved itself the most efficient in every way for greenhouse 

 heating. Get a Kroeschell and know you have the best. 



No Delay 



We anticipated a rush of last-minute orders this fall that 

 will re(iuire quick service, and we are prepared to ship any 

 size boiler at once. Telegraph or telephone your order at 

 our expense. Long distance phone, Superior 8680. Ask for 

 greenhouse department. You will get your boiler without 

 delay . 



KROESCHELL BROS. CO. 



444 W. Eri« 8tr««t 



CHICAQO, ILL. 



