156 



The Florists^ Review 



DiciUBEB 9, 1920 





Economical palntlnir ii buyinit 

 paint with a record of durability. 



DIION-S SILICA GRAPHITE PAINT 



is the moat economical and longest 

 service paint. 



Write for Booldet No. 64-B and Ions 

 service recorda. 



Jtsiph Dixon Crucible Csmviiy 



Jersey City, N. J. Est. 1827 



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. 



PIPING DOWNHILL SYSTEM. 



Please tell me how to pipe my green- 

 house for hot water heat. The crop will 

 be carnations and the temperature 

 needed will be 45 to 55 degrees. The 

 house is 21x31, six feet high to the eaves 

 and twelve feet to the ridge. The 

 foundations are concrete. The house 

 contains 1,200 square feet of glass. It 

 will require about 350 square feet of 

 radiation, will it notf There is a raised 

 bench in the center and a 3-foot bench 

 at each side wall. The house runs north 

 and south and the boiler room is at the 

 north end. 



My understanding is that the highest 

 point of the flow may be either over the 

 boiler or at the opposite end. My in- 

 tention is to use two 2-inch flows, run- 

 ning one along each plate, or one 3-inch 

 flow under the ridge. Connected with 

 the flow, or flows, would be ten 2-inch 

 returns, five of them on each side wall, 

 under the benches. Could I attach 

 two 2-inch flows to a Wilks boiler, 

 24x48? I think this boiler has only one 

 outlet. P. R.— Mo. 



For a Wilks boiler I should advise 

 using a 3-inch flow pipe, running it about 

 two feet below the ridge, with the liigh- 

 est point over the boiler. A slope of one 

 inch in ten feet will be ample. When 

 a boiler with two flow ports is used it 

 is best, for a house of the stated size 

 and width, to run a 2%-inch flow pipe 

 upon each plate or under the purlins. 

 While a radiation of 350 square feet is 

 not too large to be supplied by two 2- 

 ihch flow pipes, the number of returns 

 necessary will make it advisable to use 

 two 2%-inch flows, unless a single 3- 

 inch flow is used. 



From the amount of glass stated, I 

 infer that there must be about thirty 

 inches of glass below the plates. If a 

 minimum temperature of 55 degrees is 

 necessary in the coldest weather, it will 

 be advisable to use 350 square feet of 

 radiation, but if there is no liarm if the 

 temperature drops to 50 degrees in the 

 nights when it drops below zero out- 

 side, 300 square feet of radiation will 

 answer. 



Instead of running the returns along 

 the side walls only, it would be better 

 to drop down two 214-inch pipes from 

 the end of the 3-inch overhead flow 

 pipe, and with each of them feed a coil 



"Ain't it a Grand and Clorioua Fmmling ?'• 



Heat Your Houses with 

 Kroeschell Boilers 



YOLPLX. BE HAPPIER 

 YOU'LL BE RICHER 



TO THK MAN WHO NEEDS A BOILER 



"The customer's interest flrsf-is the basis of the KROESCHELL standard. This 

 principle makes the KROESCHELL Policy the most liberal of all in the Green- 

 house Boiler business. The great variety of boilers that we make places us In a 

 commanding position. It is the KROESCHELL principle to supply only the type 

 of boiler best suited for the conditions. For this reason we always furnish the 

 most efficient boiler unit in every case. 



The KROESCHELL has proven its worth in many of the large establishments in 

 this country. It has frequently been selected by the most careful buyers in 

 competition with all other types of boilers. Its efficiency and capacity are com- 

 pletely beyond any other boiler. 



KROESCHELL BOILERS have no bulky, soot accumu- 

 lating surfaces— you avoid the disagreeable work and 

 trouble indispensable to cleaning boilers with compli- 

 cated and tortuous back and forth passages. 



The superiority of our boilers has resulted in the removal and abolishment of 

 hundreds of cast iron sectional boilers— in every instance KROESCHELL BOILERS 

 give more heat with the same piping with less fuel. 



WHEN YOU BUY-OET A KROESCHELL 



KROESCHELL BROS. CO., 



444 W. Eri« Str««t 

 CHICAGO, ILL. 



