118 



The Rorists'^ Review 



July 13, 1922 



Greenhouse Heating 



SuBSCBiBEBS are invited to write the 

 editor of this department with regard to 

 anj details of greenhouse heating that are 

 not understood. When information is de- 

 sired regarding the capacity of boilers, or 

 the amount oi 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 hay* a sketch showing the 

 location of the houses. 



SIZE OF BOILER NEEDED. 



Kindly state tlu- i-npiu-ity of :i hot 

 water boiler reciuired to heat a liouse, 

 25x1 (»0 feet, when the outside tempera- 

 ture is 10 defrrees below zero. The liouse 

 runs east and west and the boiler room 

 is located at the northwest corner of the 

 house. I am runninjj two ;<-inch mains 

 and twelve li-inch flows an<l returns. 

 Tlie house has three feet of jclass in 

 both of the side walls. It is fourteen 

 feet from the ground to the ridge and 

 six feet to tlu^ gutter. J. S. — Ind. 



Tlie size of heater recjuired for a 

 given greenhouse dejx'nds to a consid- 

 erable extent U])on the temperature to 

 be maintained. Nothing is stated above 

 on this ])oint, but, judging from the 

 radiation used, it is inferred that it is 

 from .")") degrees to (i(» degrees, althougli, 

 if 60 degrees is to be suiijdied at the 

 lowest temperatures in central Indiana, 

 it will be necessary to give careful at- 

 tention to the firing. A lioiler with a 

 large grate surface will be needed. 



For (iO degrees, about 1,;!II0 s(|uare 

 feet of radiation will be desirable and 

 it would be advisable to use a boiler 

 with a grate twenty-eight inches in 

 diameter, if a good grade of soft coal 

 is to be used. For the ordinary run-of- 

 mine coal it would be well to have a 

 grate thirty inches in diameter, (U- .about 

 six scjUiire feet of grate ai'ea. For .")il 

 degrees the are.a of the grate should be 

 about five siiuare feet. There should not 

 be more than three sections above the 

 tire ]iot, if .'i horizontjil boiler is to be 

 used. 



RADIATION TOO LOW. 



Kindly suggest a heating arrange- 

 ment for a range of two greenhouses, 

 L'llx.')(l feet, with three feet of gl.ass in 

 tlie side wjijls. We ran tlie one house 

 last winter with a l2-iiich flow near the 

 ridge and three li/^.-iiich returns under 

 each bench. Kach house is to contain 

 two sid(^ benches two and one-half feet 

 wide !ind two solid beds, each four and 

 one-half feet wide and eighteen inches 

 dee]). Would one 2-inch tlow pipe on 

 each gutter, with three I'ij-iiich re- 

 turns under each bench, give us a telii- 

 ]ieratiire of (id degrees in zero we.atlier? 

 We should like to carry the ]iresent 

 house iit (ill degrees anil the new house 

 at •")(• degrees. The return is to be level 

 with or just above the to]i of th(> boiler, 

 which is an ujiright tubular, with a 

 ;i()-inch grate. Hot wjiter is to be use(l. 



.\. F. R.— Kv. 



In estimating the radiation for a 

 greenhouse, a good deal dejiends ujion 

 the frequency with which the ininimuin 

 outside temperature ])revai]s, and the 

 extent to which, economv of fuel and 



BUSY! 



Who said busy? Come around to our 

 factory if you want to see industrial action. 

 Come near it any day and you will hear a 

 humming that can come from only a busy 

 boiler works, and in the evening after the 

 sun goes down you will find a light in every 

 window, and the same activities go on all 

 night long with all the earmarks of enor- 

 mous demand. 



We have got a big spindle full of orders to 

 take care of and more orders are coming 

 in every day. It keeps us moving, but we 

 can handle them and a good many more. 



Every year more florists become acquainted 

 with the high efficiency of Kroeschell Boil- 

 ers for greenhouse heating and, conse- 

 quently, every year brings an increased 

 demand for them. 



This year the increase in demand for 

 Kroeschell Boilers has been greater than 

 at any other time. Orders are arriving in 

 every mail from all parts of the country. 



Get your order into the mail this week. 

 We want to serve you promptly. 



Don't wait — order your 

 Kroeschell today. 



WHEN YOU BUY - GET A KROESCHELL 



■^HE BOILER OP UNEQUALED FUEL ECONOMY" 



Brunswick-Kroeschell Co., 



444 We«t Erie Strset 



CHICAGO, ILL. 



