128 



1 be Rorists Revieu 



Of rOBKK «. IW.'l 



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 

 helpful, also, to have a sketch showing 

 the location of tl\e houses. 



BADIATION INADEQUATE. 



T have a greenhouse 21x68 feet; the 

 sides aro yix foot hi^h with thirty-six 

 inches of open glass, and tlie height at 

 j^ablc is eleven and one-halt' feet. The 

 west end of the house is glass and ex- 

 posed. The east end is adjacent to the 

 boiler room. I have a boiler with a 

 .30x48-inch grate and o)ie •2\i,-im'h flow 

 and nine IMi-inch return pipes. What 

 are the heating requirements for the 

 house mentioned at .') degrees below 

 zerof H. H. W.— lud. 



A boiler with a pirate 30x48 inches 

 should be capable of heating Two houses 

 ■ of the dimensions described. 



According to description, the house 

 has three feet of tilass in the two side 

 and one end wall. To heat such a house 

 to 57 degrees when it is .> below zero, 

 .-ibout 700 square feet of hot water 

 radiation Avill be recpiired. This is al- 

 togetlicr too mucli to be supplied by one 

 l!i/a-inch flow pipe. ^Vhile fairly good 

 results would be secured with two liVy- 

 .inch flow pipes, it would be advisable to 

 use three. 



In addition to the flow l)ipi's, use 

 fifteen ly^-inch, or preferably twelve 

 •_'-inch, ret'urns. To supply 700 square 

 feet of hot water radiation, a 4-incli 

 main flow pipe with a return main of 

 the same size could be used. 



If the mains are only a few feet in 

 length, it would be possible to use Ibinch 

 ]iipes. 



Place one flow pipe on each of the side 

 wall plates and the other four feet be- 

 low the ridge. Give all pipes a slight 

 fall and connect the expansion tank 

 with tlie liighest i)oint in the system. 



BOILER RATING COMPUTED. 



Our range consists of three houses 

 each 18x96 feet with 4-foot board and 

 paper walls, one house 'J4x.30 feet and 

 one liouse li.'SxlaO feet with 4 fDot con- 

 crete walls; the average height to ridge 

 is ten feet. We have one steam boiler 

 with a 3%x4-foot grate. Is this boiler 

 sufliciently large to heat the entire 

 range to HO degrees in weather 10 de- 

 grees below zero.' 



How is the rating' of a boiler com- 

 puted.' !■'• R.— Pa. 



According to description, there are 

 three houses each l^x'.tti feet, one house 

 L'4x.">0 feet and one house L'.'.xl.'d feet, 

 with about 13.000 s(|uare feet of exposed 

 glass. Including tlie mains, this will 

 not require to exceed 2,000 square feet 

 of radiation to give a temperature of 

 .lO degrees in all of the houses. 



If the present boiler is properly set 

 and is safe for tive jiounds of steam, it 

 should heat all of the houses without 

 diflicultv. In f;ict, there is inst.ance of 



Frank Oechslin's Quincy Street Plant 



Get a Kroeschell 



When it comes to the greenhouse busi- 

 ness, Frank Oechslin, as the saying goes, 

 "knows his stuff." His knowledge of 

 the flower-growing business is a sound, 

 mature knowledge, based on experience 

 and persistent study of every phase of 

 the business. He knows what he wants 

 and why he wants it. He did not hes- 

 itate in selecting Kroeschell Boilers for 

 the heating of his Harlem and Quincy 

 Street plants. You need not hesitate in 

 selecting the Kroeschell Boiler for heat- 

 ing your houses. There is no better 

 boiler for greenhouse heating. 



Immediate Shipment 



We can ship any size boiler to you in a hurry. 

 Telegraph or telephone your order at our ex- 

 pense. SLong distance phone, Superior 8680. 

 Ask for greenhouse department. 



KROESCHELL BROS. CO. 



444 W. Erie Street 



CHICAGO, ILL. 



