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132 



I 



The Rorists^ Review 



Afbu. 20. 19M 



fireenhoase Heating 



SiTBSORiBERS are invited to write the 

 editor of this department with regard to 

 anj 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. 



RADIATION OF BOII£BS. 



How many square feet of radiation 

 will a 35-horsepower boiler heatf 



A. C— Wis. 



For boilers of a large size it is cus- 

 tomary to figure 100 square feet of ra- 

 diation to each horsepower, but it will 

 be safer not to rely upon heating more 

 than 2,000, or at the most 2,500 square 

 feet of steam radiation with a 35-horse- 

 power boiler. 



If hot water is to be used and the 

 grate is sufficiently large, the same boil- 

 er will answer for about twice the above 

 amount of radiation, or 10,000 to 15,000 

 square feet of glass, according to the 

 temperature desired. 



EITHEB HOT WATEB OB STEAM. 



We have a greenhouse, 20x30 feet, 

 running north and south, with the boiler 

 house at the northeast corner. The walls 

 of this house contain three feet of ce- 

 ment and one row of 16-inch glass below 

 the gutter. The ends are of glass. This 

 is house A. 



This spring we will erect another 

 house, 30x90 feet, which will adjoin 

 house A and run east and west. The 

 north wall of this house will contain 

 three feet of cement and one row of 16- 

 inch glass. The west end will be glass 

 except the 3-foot cement wall. The 

 south side will be sixteen inches of ce- 

 ment and three feet of glass. 



House B will have a bench running 

 full length of the north side. The rest 

 will be a solid bed for lettuce. 



We want to have 60 degrees of heat 

 in zero weather. Kindly tell us how to 

 pipe for steam heat, also for hot water, 

 as we have not decided which we shall 

 use. 



What size of steam boiler will be 

 needed, also what size of hot water 

 boilerf J. M. G.— Mich. 



To heat house A to 60 degrees in zero 

 weather about 300 square fpet of hot 

 water radiation will be required, while 

 1,260 square feet will be needed in house 

 B. Use a hot water boiler rated for 

 about 2,000 square feet of radiation. 

 While the size of the grate will vary in 

 different boilers, it should not be far 

 from 30x36 inches for soft coal. 



In the way of radiation use for house 

 A three 2i(4-inch flow pipes and nine 

 2-inch returns, placing the returns in 

 three coils under the benches, with one 

 flow pipe upon each plate and the other 

 two feet below the ridge. 



For house B 'ise five 2^4-inch flow 

 pipes and fifteen 2-inch returns. Place 

 the two extra flows on the purlin posts 

 and a coil of three 2-inch return pipes 

 on each wall. The other returns should 

 b« OB tb« sides of th« beds. If the 



KROESCHELL 



GREENHOUSE SPECIALTIES 



NOT 



CAST 



IRON 



Mad« In 20 Sizes 



HEATING and COOFJNG arr two hranrhe« of enKiiiferi..K «'>i 

 wUek w« tpccUUxe for the greeaho^iM trade. 



Over thirty years have befti Hrv-itpH \w \\- • •'^>- ■■ MstrMi-iicu 

 and deiigrning of boilers and refrigerating apparatus. 

 During this period we have furnished and installed heating and 

 cooling systems for the most successful greenhouse men in this 

 country. 



Tttbeless Boiler 



KROESCHELL Boilers are making the most wonderful grean- 

 house heating record in the world. Florists who have aaed 

 other makes are constantly giving the KROESCHELL the 

 highest praise. 



KROESCHELL: 



PIREricWATfRTUBt 



VATCNTeO ■•■« 



BOILER. 



The High Pressure Kroeschell— a highly efficient unit for steam 

 plants 100 H. P. and over. 



13,468,520 sq. ft. of glass was equipped with KROESCHELL 

 Boilers during the past five years. 



Water Tube Steam BoUer 



When in need of refrigeration investigate the Kroeschell Sys- 

 tem — its high efficiency and low cost of operation place the 

 Kroeschell System of Refrigeration in the foremost rank for 

 greenhouse use. Our system of Refrigeration and Cooling Is 

 easily installed— perfect control of temperature and absolute 

 safety insured— no ammonia tised for this system. 



Send for Boiler or Ice Machine Catalogues. 

 Sute which is wanted. 



BUY DIRECT-FACTORY TO USER PRICES 



KROESCHELL BROS. CO. 444 v^.,* En. street. 



KROESCHELL BROS. ICE MACH. CO. Chicago, ill. 



<a.^— b^isA^iaBikd^M 



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