156 



The Florists^ Review 



Febroary 2. 1022 



Greenhouse Heating 



SuBSCKiBKRS 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 tempera- 

 tures should be stated in the inquiry, as 

 well as the amount of glass in the side 

 walls, and the dimensions and general 

 arrangement of the greenhouses. It is 

 often helpful, also, to have a sketch 

 showing the location of the houses. 



HEATING FOR BOSES. 



I am enclosing a sketch showing a 

 contemplated plan for heating two new 

 rose houses. Will you kindly answer 

 the following questions: 



Are the pipe sizes properly graded! 



Is there sufficient radiation to main- 

 tain a temperature of 50 degrees when 

 the outside temperature is 10 degrees 

 below zero? 



Does the general scheme of installa- 

 tion appear practical! 



How much allowance would have to 

 be made for expansion and at what 

 points would the greatest expansion 

 take place! 



The colder end of the houses will 

 be the west end, the north end being 

 sheltered by small woods. The heat is 

 to be steam, at about ten pounds' pres- 

 sure. What horsepower boiler would be 

 required to cover an additional two 

 houses of the same size and for the same 

 purpose! E. L. E. — Wis. 



The two houses are sliown to be 

 33x200 feet, with five feet of glass in 

 the south side of the south house. All 

 other walls are of wood. 



The piping suggested is arranged in 

 two sections, fed at the ends of the 

 houses, so that the coils are something 

 less than 100 feet in length. This 

 would work all right, but it will be 

 rather more expensive to install than to 

 run overhead flow pipes to the west end 

 of each house and connect with coils 

 running the entire length of the houses. 

 As now arranged, there is a 4-inch supply 

 pipe across the east end of the houses, 

 from which the coils on the east half of 

 the houses arc supplied, and two 2%- 

 inch pipes and one 2-incli pipe lead to 

 the west end of the houses to supply 

 the other coils. One of these feed pipes 

 makes a loop at the cast end. Across 

 both of the houses at the center there 

 are two 2-inch pipes, wutli which the 

 returns from the coils are connected. 

 All of these help out with tlie radiation 

 proper, which consists of eight 1-inch 

 pipes in the south house, eight in the east 

 half of the north house and six in the 

 west half, the radiation in tliat part be- 

 ing helped out by the two 2 inch return 

 pipes, which run back to the boiler from 

 the center of tlie house. 



The radiation altogether would be 

 able to maintain perhaps 50 degrees 

 in weather that is 10 degrees below 

 zero, but for 57 degrees it would be ad- 

 visable to put in about three adilitional 

 returns in each liouse, or, what would 

 be about the same thing, substitute lU- 

 inch pipes for 1-ineh pipes in the coils. 



Instead of using the plan suggested, 

 it would be preferable to run either two 

 2%-inch supply pipes or three 2inch in 

 each of the houses and at the farther 





Wrigley Building, Chicago. 



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 orders this winter that will 

 require quick srevice, 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 green- 

 house department. You will get your boiler without delay. 



KROESCHELL BROS. CO. 



444 W. Eri* Strett 



CHICAQO, ILL. 



