96 



The Florists' Review 



Fkbboabx 20, 1918. 



GreenhoHse Healing 



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. 



STEAM FOB THREE HOUSES. 



I have three greenhouses, to be heated 

 to temperatures of 60 to 65 degrees. 

 The outside temperature in some winters 

 drops to 15 degrees below zero. One of 

 the houses is 24x100, another is 16x125 

 ■and the third is a lean-to, 6x125, for 

 propagating purposes. The walls are 

 concrete and the side walls are four 

 feet high. A potting shed extends 

 across the north end. The boiler pit is 

 eight feet deep. The boiler is for steam 

 and is of the sectional type, with a 

 firebox 26%x44 inches. My idea is to 

 use 1%-inch or l^^-inch flows and 1-inch 

 returns, connecting each flow with two 

 or three returns. Would this system 

 work to the best advantage? If not, 

 please describe a better way. Also state 

 the number of flows and returns needed. 

 The flows are to be fastened to the 

 plates and purlins; the returns are to be 

 placed under the benches. Is the boiler 

 large enough to heat all the space? 



W. H. B.— N. J. 



Good results may be obtained either 

 with 1%-inch or l^rinch flow pipes and 

 with either 114-inch or 1-inch return 

 pipes in the coils. On the whole, we 

 would prefer 1%-inch flows for houses 

 over 100 feet in length. 



For the house 24x100 we would sug- 

 gest the use of two 1^-inch flows and 

 either fifteen 1-inch or twelve 1*4 -inch 

 returns. In the house 16x125 we would 

 use two flows and either nine 1-inch 

 or seven 1^-inch returns. In the house 

 6x125 there should be one flow and 

 three returns, either 1%-inch or 1-inch. 

 Provided the houses are in a sheltered 

 location and the outside temperature 

 only occasionally reaches the low figure 

 mentioned, it would be possible, with 

 careful attention to the firing, to carry 

 the houses at 60 degrees with one or two 

 less returns in the two wider houses. 



If for any reason it is deemed advis- 

 able to use three flow pipes in the wider 

 houses, good results will be obtained by 

 putting in li4-inch flows, instead of 

 two l^^-inch as already suggested. 

 There should be no difficulty in keeping 

 up the temperature with a boiler having 

 a grate 26%x44 inches. 



BOILEB SIZE COBBECT. 



I must replace an old boiler that has 

 been in use for many years. I believe 

 the new boiler should be a little larger 

 than the old, to be efficient. I now 

 have a steel tubular boiler, fifty-four 

 inches in diameter and sixteen feet 

 long, with fifty 3% -inch flues. It is 

 bricked in. I want a boiler that will 

 heat 20,000 square feet of glass; 5,000 

 feet to 60 degrees and 15,000 feet to 

 52 degrees, night temperature. What 



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HIGH PRESSURE KROESCHELL 



FOR STEAM PLANTS 



OVER 



100 HORSEPOWER 



KROESCHELL^ 



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MkTCMTCO ••■> 



BOILER- 



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The Kroeschell Fire and Water Tube Boiler 

 is Designed to Obtain: 



1. Three (3) pass fire travel, 50% lonser 

 than any tubular boiler. 



2. A large storage capacity of water, 

 affording abundant heat storage energy to 

 respond to sudden demands for increased 

 steam supply. 



3. Large steam storage space, free steam 

 liberating surface, and dry steam. 



4. Thorough circulation to produce 

 highest possible efficiency and rapid steam 

 generating power. 



6. Automatic self-cleaning, by which 

 Q all scale forming material is deposited out 

 of reach of the fire and where it can be 

 readi-ly removed. (Heating and power plant 

 owners who are forced to use bad water will 



r-, appreciate the vital importance of this 

 feature.) 



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6. Accessibility for inspection, clean- 

 ing, and repairs. 



7. Perfect combustion under ordinary 

 draft conditions. 



8. Maximum heat absorption. 



9. Absolute prevention of burnt or sag- 

 ged plates. 



10. A setting independent of boiler 

 walls. 



11. Freedom for expansion of all parts 

 and eaual expansion between shell and 

 tubes so that there can be no leakage at 

 tube ends. 



12. Removal of gases at the rear. 



13. Greatest possible capacity for a 

 minimum of floor space. 



14. Setting may be arranged for hand 

 firing or mechanical stokers. 



3,016,286 square feet of glass well equipped with 

 KROESCHELL Boilers during the year of 1916. 



WHEN YOU BUY GET A KROESCHELL 

 'THE BOILER WITH THE THREE (3) PASS FIRE TRAVEL" 



KROESCHELL BROS. CO., 



444 W. Erie Streetp 

 CHICAGO, ILL. 



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