158 



The Florists^ Review 



Mahch 10, 1921. 



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. 



SUGGESTIONS FOR HEATING. 



I am going to build one house, 35x200 

 feet, sixteen feet to the ridge and six 

 feet high at the plates. I should like 

 to use a 5-inch supply through the 

 middle of tlie house ana should like to 

 avoid using coils on the sides, as they 

 shade the house more or less. 



Can you offer some suggestions and 

 let me know the arrangement for heat- 

 ing this size of house? I will put in a 

 new boiler and should like to know 

 what size to get to heat two houses of 

 this size. Is hot water or steam the 

 more satisfactory? A. M. R. — Ky. 



There are several points that must be 

 understood before definite answers to 

 the above questions can be given. 

 Among them are the amount of glass in 

 the walls, the temperature desired, and 

 whether beds or benches are to be used. 



From the reference made to the shade 

 from pipes on the walls, we judge that 

 there will be glass in the walls and will 

 consider that it will amount to at least 

 three feet in width on two sides and 

 one end. The usual temperatures in 

 greenhouses are 50 to 52 degrees for 

 certain classes of plants and 60 to 62 

 degrees for other classes which need 

 more heat. 



Good results may be obtained with 

 either steam or hot water heat; the 

 latter is generally preferable for small 

 ranges, but the cost of a hot water heat- 

 ing plant will be about 50 per cent more 

 than for a steam plant. Considering the 

 high cost of labor and material, we are 

 inclined to favor the use of steam, espe- 

 cially if one or more additional houses 

 are to be constructed in the near future. 

 In northern Kentucky the winters are 

 comparatively short and there will be 

 few nights when the outside tempera- 

 ture will drop to zero, which will tend 

 to lessen the amount of night firing. 



The costs of labor and materials vary 

 in diflferent sections, to say nothing of 

 the frequent fluctuations, and we sug- 

 gest that estimates be secured from 

 local steam-fitters and jobbers in green- 

 house heating materials. 



While one 5-inch flow pipe would 

 answer for heating the house with 

 steam, at least two pipes of that size 

 will be required if hot water is to be 

 used. With steam, however, we would 

 suggest the use of two 2i,4-inch flow 

 pipes, locating them on the purlins or 

 purlin posts. Fourteen l^i-inch return 

 pipes will be required in the coils. If 

 raised benches are used, three pipes 

 may be under the side benches and two 

 under each of the others. With solid 

 beds the shade from three pipes on 

 the side walls will not be serious, and 

 the remainder of the return pipes may 

 be in the walks or on the sides of the 



It^J^S-C^-^CoX—Ckt Tgc 



It will pay you to consider the advantages of KROESCHELL BOILERS 



for Hot Water or Steam no matter how large or small the size of your 

 establishment 



The superiority of our boilers has resulted in the removal and abolish- 

 ment of hundreds of cast iron sectional boilers— in every instance KROE- 

 SCHELL BOILERS give more beat with th - same piping with less fuel. 



KROESCHILL BOILERS have no bulky, soot-accumulating surfaces— 

 you avoid the disagreeable work and trouble indispensable to cleaning 

 boilers with complicated and tortuous back and forth fire passages, 



No Tubes 

 To Clean, 



No 

 RAasonry 

 Required 



For Steam 



Plants 



Less Than 



lOO 



Horse Power 



Kroescheil Water Tube Steam Boiler 



The KROESCHELL Water Tube 

 Steam Boiler was created to meet 

 the demands of high pressure steam 

 heating plants, le,-s than 100 h. p. ca- 

 pacity. No masonry leauired- no tubes 

 to cli' n. 



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. The 

 KROESCHELL will increase your heat- 

 ins plant I fficiency 20 to 40%. 



DWSOB! 



,*M "^^^■■ 



.*••> m * 



rii^Ki^SttS^ 



Year after year, the KROESCHfLL Hot Watar Boiler has s^ven the best of 

 sativfaciion to men who know boilers men to whom results are the very 

 thins* that count. There is a KROESCHELL for every fereenhouse plant, be 

 it large or small. 



KROESCHELL BROS. CO., 



444 W. Eri* Stre«t 

 CHICAGO, ILL. 



