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116 



The Florists^ Review 



Jdlt 1, 1920 



Greeahouse 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 boilers, 

 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. 



USE OVERHEAD FLOWS. 



I built a greenhouse, 19x52 feet, last 

 fall. There is eighteen inches of glass 

 in the side walls. The boiler room is 

 on the north side. I have a Capitol 

 Winchester boiler, which has a 2-foot 

 base and is set two feet below the level 

 of the greenhouse floor. The pipe out 

 of the boiler is 4-inch and there are 

 four flows of 3-inch pipe and eight re- 

 turns of 2-inch pipe. I cannot keep 

 a temperature of 60 degrees when it is 

 zero outside. I can only keep about 40 

 degrees of heat with hard firing. What 

 can I do to help it? N. Mc. — Kan. 



So far as the amount of radiation is 

 concerned, no change is needed, as the 

 amount used should maintain 60 degrees 

 when it is 15 degrees below zero with- 

 out pushing the fire. The location and 

 arrangement of the pipes are not given, 

 but if the flow pipes are at or above the 

 level of the plates and have a slight 

 downhill grade and if the returns are at 

 least one foot above the level of the 

 grate, satisfactory results should be ex- 

 pected. The best results will be ob- 

 tained with overhead flow pipes and 

 with the returns well above the top of 

 the boiler. If it is not possible to 

 lower the boiler, raise the flow pipes 

 to the level of the purlins, and also 

 carry the returns as high as possible, 

 running both with a fall of one inch in 

 fifteen feet. The use of a mercury cir- 

 culator would also be helpful. 



MAINTAINING 60 DEGREES. 



I have four greenhouses, 25x100 feet, 

 built in line. The gutters are seven 

 feet from the ground. If I put three 

 benches, 6x97 feet, in each house, how 

 many 2-inch pipes arc necessary under 

 the benches to maintain a heat of 60 

 and 65 degrees when the temperature 

 is zero outside? What size of main and 

 what size of flows are necessary? I 

 have an International Empress hot 

 water boiler, the capacity of which is 

 supposed to be 7,900 square feet of ra- 

 diation. The pipes at the farther end 

 are about one foot higher than those 

 near the boiler. M. J. — O. 



If there is glass in the side walls, I 

 should suggest that one 2%-inch flow be 

 placed upon each side wall plate, that 

 2-inch returns be connected with these 

 at the farther end of the house and that 

 they run back to the boiler a foot or 

 two below the flow pipe. 



For the coils under the benches, use 

 one 2%-inch flow pipe under the ridge 

 and one under each purlin. Each of the 

 under-bench coils will require two 2- 

 inch returns. 



For the center houses, and for the 



WHEN YOU BUY- GET A KRQESCHELL 

 "THE BOILER OF UNEQUALED FUEL ECONOMY" 



NOT 

 CAST 

 IRON 



NOT 



CAST 



IRON 



Expressions from Men Who Know Boilers 



Get tke Kneichdl Fint 



Several years ago Mr. 



corresponded with us In regard 



to the Kroeschell Hot Water Boiler, but was persuaded to Install 

 two sectional cast Iron boilers which were claimed to be superior 

 to the Kroeschell 



In the meantime we placed a number of Kroeschell Boilers In 



the Immediate vicinity of Mr. and he could not help 



but notice their great efficiency, and last year, while at the con- 

 vention, he placed his order for his first Kroeschell. The fol- 

 lowing letter speaks for Itself: 



"We like the Kroeschell Boiler very much. It gtvea entire 

 satisfaction, and it Is so easy to Are. I will trade yon the two 

 cast iron sectional boilers for another lilie the Kroeschell I have." 



[Signed] Mr. 



-, Ohio. 



No More Cast Iron Boilers 



I have used several different makes 

 of boilers, but none I like as well 

 as yours. 



The Kroeschell is easier to fire, 

 takes less coal and water circulates 

 quicker than any other boiler. 



I have used two different ma''es 

 of sectional boilers — no more cast 

 iron boilers for us. 



[Signed] Mr. . Mich. 



Kroeschell Replaces Cast Iron 



The Kroeschell has replaced three 

 cast iron sectional boilers, and it cer- 

 tainly has given entire satisfaction. 



It only takes a few words to ex- 

 press the good quality of your boilers 

 and they are as follows: "Of all firms 

 handling boilers and advertising 

 them truthfully, the party buying a 

 boiler would have to get 'he Kroe- 

 schell, as you sre certainly advertis- 

 ing nothing but facts." 



[Signed] Mr. . N.Y. 



KROESCHELL BOILERS will put Msh 

 temperatures into your heating lines. 



KROESCHELL BROS. CO., ni.rc/.£^*,VLr* 



