118 



The Rorists' Review 



SiFTEMBEB 1, 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 

 helpful, also, to have a sketch showing 

 the location of the houses. 



USING PIPES ON HAND. 



I desire to pipe a small greenhouse, 

 14x24. It has raised benches, which run 

 north and south. There are 30-inch side 

 benches and a 50-inch center bench. 

 There are two feet of glass in each side 

 of the house and the south end is of 

 glass. The north end adjoins the pot- 

 ting sheds, etc. i have plenty of 

 2-inch and 3-inch pipes. What size of 

 boiler will be needed and what is the 

 best way to pipe the house? The boiler 

 will be placed in a cellar under the 

 house. I wish to maintain about 50 de- 

 grees in zero weather. 



C. H. H.— N. Y. 



The 3-inch pipe may be used for the 

 main flow and return. Inside the green- 

 house it would be advisable to run a 

 2-inch flow pipe on each plate and an- 

 other two feet below the ridge. Con- 

 nect each flow pipe at the farther end of 

 the greenhouse with two 2-inch returns 

 or, if the amount of 2-inch pipe on hand 

 is not sufficient to furnish the entire 

 amount of radiation needed, three 1%- 

 inch returns may be substituted in each 

 coil for the two 2-inch pipes. Place the 

 return coils under the benches and con- 

 nect each coil with the 3-inch return 

 main by means of 2-inch pipe. Join the 

 expansion tank with the highest point 

 in the main. The boiler should be rated 

 for 300 square feet of hot water radia- 

 tion, although 250 square feet will an- 

 swer if hard coal is to be used. 



FOR HOUSE AND HOTBED. 



Will you tell me how to pipe a small 

 house, 14x40, that I am building? It 

 is four feet to the plate and seven and 

 one-half feet to the ridge. There will 

 be no glass in the sides. I want to run 

 a 6-foot hotbed on the south side of the 

 house. Could I leave the side of the 

 house open and ventilate the bed, with- 

 out causing a draft in the house? 



F. W. H.— Pa. 



If the greenhouse is to be used for 

 almost any of the ordinary crops except 

 roses, there will not be any serious 

 trouble if the plan outlined is followed. 

 The temperature desired in the house is 

 not stated, but if 60 degrees is to be 

 maintained, it will be necessary to use 

 one 2-inch flow pipe on each side wall 

 plate and to connect each flow pipe with 

 three 2-inch or four iy2-inch returns 

 under the side benches. For 50 degrees 

 use two 2-inch or three l^^-inch returns. 



The above does not take into account 

 the hotbed, which will need to be heated 

 in some way, if the temperatures men- 

 tioned are maintained in the greenhouse. 

 To secure 50 degrees in the hotbed, 

 substitute a 2%-inch flow pipe for the 

 2-inch on the side of the house ad- 



^THE BOILER 

 OF ONEQUALED 

 FUEL ECONOMY" 



Enough Said — 



Ws the Kroeschell 



Kroeschell Boilers are highest 

 in heating efficiency and lowest 

 in fuel waste. 



When a man like Frank Oech- 

 slin, owner of one of the largest 

 ranges and grower of the best 

 stock in the country, equips his 

 greenhouses with Kroeschell 

 Boilers, you can be sure that 

 there is no better boiler for you 

 than a Kroeschell. 



Ensineerinc Advice and Quota- 

 tions cheerfully submitted— 

 Let us itnow your requirements 



WHEN YOU BUY-QET A KROESCHELL 

 '^HE BOILER OF UNEQUALED FUEL ECONOIMY'' 



KROESCHELL BROS. CO., 



444 W. Eri* Str««t 

 CHICAGO, ILL. 



