112 



The Florists' Review 



AuausT 23. 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. 



FROM STEAM TO WATER. 



I have a greenhouse, 21x90 feet, heat- 

 ed with steam and I wish to heat with 

 water. The house has 6-foot eaves, with 

 three feet of glass and three feet of 

 wood. I have a boiler large enough to 

 heat two houses this size, as I expect to 

 build another soon. I have 300 feet of 

 2-in('h pipe and 1,200 feet of lV4-inch. 

 Can I use the 2-inch pipe for the mains 

 and the 1%-inch for the returns, which 

 will be under the benches? The boiler 

 is in a 5-foot pit. The coldest weather 

 we have ever had was 18 degrees below 

 zero. I desire to maintain a tempera- 

 ture of 50 degrees. E. K. — Mo. 



We should prefer to use 2i^-inch flow 

 pipes and 2-incli returns for a house 

 ninety feet long, but, by using a circu- 

 lator, there should be no trouble in se- 

 curing a good circulation when 2-inch 

 flows i\n<\ 11/4-inch returns are used. Eun 

 four flows, placing one on each side wall 

 and the others on the purlin posts, and 

 connect each flow with a coil of three 

 IVi-inch returns. 



CHOOSING PIPING. 



We sliould like to know the best way 

 to pipe a greenhouse, 27 x CtO. It is five 

 feet six inches to the gutter and four- 

 teen feet to the ridge. It has three and 

 one-half feet of glass in the south wall 

 and twenty inches of glass in the north 

 wall. It must be heated to 60 degrees 

 in zero weather. We had two small 

 houses in the same place and used two 

 2-inch flows and two 2-inch returns 

 from the boiler. The boiler is fifty 

 feet from the end of the house. 



C. r. S.— Kv. 



It would be advisable to use three 

 2%-inch flow pipes and twelve 2-inch 

 returns for the house described. Place 

 one flow four feet below the ridge and 

 the other on the side wall plates. Con- 

 nect each flow with a coil of four 2-inch 

 returns located below the flows. If the 

 weather is likely to remain at zero for 

 periods of long duration, it would be 

 advisable to use five returns in each 

 coil. 



HARD OR SOFT COAL? 



We are installing a Lord & Burnham 

 heating system in our greenhouses, con- 

 sisting of one W-36-6 hot water boiler 

 and 3,400 feet of 2-incli ]npe in coils. 

 The greenhouses consist of four con- 

 nected ]Sx75-foot ridge and furrow 

 houses, with one 2-foot wall on the west 

 side and three feet of sashes. They are 

 protected on the north end by a work 

 shed and the roof of a house on the east 



BOILER 

 BUYING 



Not so long ago it vv^as easy to sell 

 almost anything. But to sell nowadays you 

 have got to show the goods. You must show 

 a man that he is getting full value for every 

 penny or he will not buy. 



A high standard of quality has made it 

 always easy to sell Kroeschell Boilers, and 

 right now in these times of balky buying, 

 when other boiler factories are practically shut 

 down, more Kroeschells are being bought 

 than ever before. 



Growers are buying Kroeschell Boilers 

 because they know they are getting full value 

 for every penny; because they have learned 

 that there is no other boiler as eflficient for 

 greenhouse heating. 



Write us a letter today and we will point 

 out to you in clear facts wny the Kroeschell 

 Hot Water Boiler is your best buy. 



The Kroeschell Hot Water Boiler 



has the highest standard of heating values. 

 Immense Self-cleaning Heating Surface, Long- 

 est Fire Travel, Perfect Combustion, Free Cir- 

 culation, Thin Waterways, Honest Working 

 Capacities, Unequaled Fuel Economy. 



EngineerinK Advice and Quota- 

 tions cheerfully submitted— 

 Let us know your requirements 



WHEN YOU BUY - SET A KROESCHELL 

 "THE BOILER OF UNEQUALED FUEL ECONOMY' 



KROESCHELL BROS. CO., 



444 W. Eri* Str««t 

 CHICAGO, ILL. 



