136 



The Florists' Review 



March 3. 1921 



Greenhouse Hea ting 



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. 



RADIATION OF BOILER. 



Having a cast-iron sectional boiler of 

 nine sections, with a grate surface of 

 20x40 inches and fifteen 2-inch flues, 

 I should like to have you tell me what 

 amount of radiation this boiler has. 

 F. W. P.— N. Y. 



With the limited data given, it is dif- 

 ficult to furnish any definite rating for 

 the boiler, but a first-class boiler with a 

 grate of the size mentioned would be 

 rated for 1,600 square feet of radiation, 

 using a good grade of hard coal. With 

 soft coal it would not be rated luucli 

 above 1,200 square feet, especially as 

 the coal is not always of the best. 

 As we have no knowledge of the actual 

 efficiency of tlie boiler, it would be 

 safer to limit a boiler with a grate 

 20x40 inches to 1,000 square feet of hot 

 water radiation, which would be able to 

 heai about .3,000 square feet of glass to 

 60 degrees, when the outside teni]ierii- 

 turc is 10 degrees below zero. Some 

 boilers would Ije able to handle from 

 twenty-five to fifty j>er ct'iit inorf tli;tii 

 this. 



TO HEAT NEW HOUSES. 



I am enclosing a rough sketch of tlic 

 two greenhouses I am building. Tlifv 

 are 21x50 feet, with 4-foot side walls. 

 half glass and half concrete. The 

 height to the ridge is nine feet, and 

 there will be three to fonr feet of walk 

 between the two houses. I shall use 

 4-inch flows and returns from the boilc>r 

 .across tke end of both houses, ami 

 branch off with 2 inch jiipe for the 

 coils, which will be under four beiirlie^ 

 in each house. The 4inch iii.aiii |ii|ies 

 will be below tlie floor level, with the 

 2-inch outlets extending alio\-e the tloor 

 and then under the benches. 



I desire to lieat the house (oi the north 

 side to a temperature of <!(• to 6.") de- 

 grees and the other to ')C\ degrees. Will 

 you kindly tell nie how many 2-inch 

 pipes will be neeiled iti each house? 

 Would it be better to use the one to the 

 north for the warmer lionse or the one 

 nearer to the boiler? The temperature 

 outside drops as l(»w as 8 or 10 degrees 

 hf'low zero at times. .1. K. — ronn. 



While it will be jiossible to heat the 

 liouses with 2-inch flow pijies, we jirefer 

 to use flow j)ipes two an<l one half iiu-lie> 

 in diameter for such liouses. 



We suggest running three flows in 

 each house, placing one u])on each side 

 wall ])late and the other two feet below 

 the ridge, with four coils containing 

 eleven 2-inch returns in the warnu-r 

 house and eight returns in the cool 

 house. If 2-inch flow pipes are used, an 

 additional flow will be required in the 

 warm house and one more return in the 



KROESCHELL BOILERS 



Neither in tlie East or West nor the North or South has any other 

 maite of Boi er ever equaled the performance of the Kroeschell. 

 Installed for 3,974,605 square feet of glass in two years. 



The Kroeschell has proven its worth 

 in many of the largest establish- 

 ment* in this country. It hss fre- 

 quently been installed by the most 

 careful buyers in competition with 

 all other makes of boilers. 



Greenhouse owners like the Kroe- 

 schell because of its extreme sim- 

 plicity and freedom from trouble. 

 As a fuel saver it pays its own way 

 — it can be operated with 1 he cheap- 

 est grade of fuel. 



Every customer immensely satisfied. The high 

 efficiency and low cost of operation make the 

 Kroischell the best of all boilers for florists' use. 



CAN SHIP 

 ANY 8IZK 

 AT ONCE 



TKIECRAPH 

 ORDERS AT 

 OUR EXPENSE 



WHEN YOU BUY-OET A KROESCHELL 

 "THE BOILER.OF.UNEQUALED FUEL ECONOMY" 



NOT 



CAST 



IRON 



NOT 

 CAST 

 IRON 



EXPRESSIONSIIFROM MEN WHO KNOW BOILIRS 



No More Cast Iron Boilers 



I 'h:i\e useil SPM'ral ilitf'TPnt iiiakf.s 

 of toilers, but njnc il likf as well as 

 ycurs. 



Th? Kr(escliell i.s easier to tiiC. takes 

 c~s eeal ami \v;iter circulates Quiikor 

 than an.v other tuilei . 



I ha\e used t»o dittennt makes cif 

 seetiunal boilers - no more cast iron 

 boilers for us. 



(SiRceii) Mr. . .Mich. 



Kroeschell Replaces Cast Iron 



riir KriMsirhill hits iipljiciil llirci- cast 

 iron sictl, mill lidiliTS, .iiul It rn talnly lius 

 j-'lvrii entire s.ilisl'iictiiii'. 



It niii.v lak(s a few wonis to cxprcsH the 

 L'o.1.1 cnialit.v (if .Miur IkiUcis ami thoy are 

 as r.illii\\!(: "of all tliins haniliiiii; hollers 

 and aclverlisinir tliein tnilhful y, llic pa'ty 

 Iniyiiii; a lioller would have to (fet the 

 Kioewchell as you ate ceitaliily advertising 

 iiolhlnir h\it facts." 



(SiKIU'dl .Mr . N. Y. 



KROESCHELL BOILERS will put high 

 temperatures into your heating lines. 



KROESCHELL BROS. CO., 



444 W. rrie Street 

 CHICAGO, ILL. 



