112 



The Florists^ Review 



JONB 16, 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. 



ADDING TO LEAN-TO. 



I have a lean-to, 14% x 28 feet, which 

 I am heating with hot water. The flow 

 is four inches and carried well up on 

 the purlin post, with 2-inch returns. I 

 am about to add an even-span house, of 

 pipe, twenty-five feet wide and the 

 same length as the lean-to. I am going 

 to use the gutter of the lean-to for both 

 houses, forming a valley between them. 

 Both gables, north and south, will be 

 of glass and the side walls will have 

 three feet of glass. I want to use 

 raised benches at the sides and solid 

 beds in the center. How shall I place 

 the hot water pipes and what size will 

 be required to heat to a temperature 

 of 50 degrees when the outside tempera- 

 ture is 20 degrees below zero? Would 

 it be necessary to carry the 4-inch flow 

 into the new house, or would 3-ineh pipe 

 be sufficient? Eventually this house 

 will be 100 feet long. I have plenty 

 of boiler capacity. T. M.— Wis. 



For heating the 25-foot even-span 

 house, we should run five 2%-inch flow 

 pipes, with one on each side wall plate, 

 one on each row of purlin posts and the 

 other three feet below the ridge. For 

 returns, use either ten or eleven 2-ineh 

 pipes. The larger number will be needed 

 if the house is much exposed to the 

 prevailing high winds. Connect two of 

 the returns to each flow pipe, and, if 

 eleven returns are used, the extra pipe 

 should be on the south wall. 



While a 3-inch main flow pipe should 

 be sufficient for a house fifty feet long, 

 we should use a 4-inch supply pipe for 

 a house 100 feet in length. The main 

 flow and return should be of the same 

 size. Eun all the pipes downhill and 

 connect the highest point in the system 

 with the expansion tank. With this 

 arrangement there will be no occasion 

 for using air valves. 



PIPING A NEW HOUSE. 



We are going to build a greenhouse, 

 25 x 50 feet in size, with walls 5% feet 

 high, 2yo feet of which will be glass. 

 We have a steam boiler of more than 

 enough capacity to heat the house. 

 The outdoor temperature in midwinter 

 seldom goes below 8 or 10 degrees above 

 zero. Three years ago we had a bliz- 

 zard, when the temperature dropped to 

 10 degrees below zero, the lowest we 

 have had in thirty-five years. How 

 would vou advise piping the house? 

 W. W. C— Ark. 



Although mention is made of a steam 

 boiler, we are not sure whether it is 

 proposed to use steam or hot water for 

 heating the house. The boiler could be 

 used for hot water as well as steam, 



All Is Well 

 When it's a Kroeschell 



There is no other boiler that is as efficient 

 and economical as the Kroeschell Green- 

 house Boiler, and that can be maintained 

 with as little trouble. 



There is no danger of cracking or break- 

 down. There is no fuel waste. Kroe- 

 schell Boilers burn any kind of fuel, and 

 they are easy to clean. They can be 

 operated with the highest efficiency with 

 little effort and no worry. 



Kroeschell Boilers are used with the 

 greatest satisfaction everywhere, and are 

 proudly praised by the owners. You 

 cannot get away from it - the Kroeschell 

 Boiler is best in every way. 



KrO^ green house 



^^^ BOILER 



SL^ft HOT nN^ 



KROESCHELL BOILERS will give record 

 brealting service this Winter. 



CAN SHIP 

 ANY SIZE 

 AT ONCE 



NOT 

 CAST 

 IRON 



NOT 

 CAST 

 IRON 



TELEGRAPH 



ORDERS AT 



OUR EXPENSE 



WHEN YOU BUY - GET A KROESCHELL 

 'THE BOILER OF UNEQUALED FUEL ECONOMY' 



KROESCHELL BROS CO., 



444 W. Erie Street 

 CHICAGO, ILL. 



i 



