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146 



The Florists^ Review 



August 19, 1920 



Greenhouse Heating 



Subscribers are invited to write the 

 editor of this department with regard ta 

 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. 



FROM COAL TO OIL. 



I have 20,000 square feet of glass 

 and I am having a good deal of trouble 

 in getting coal. The coal dealer in- 

 formed me that he would not be able 

 to deliver enough coal to my green- 

 houses to last through the winter. Would 

 it be possible to rebuild my furnace for 

 crude oil, if I could get enough of it to 

 replace 100 tons of Pocahontas soft 

 coal? How much would it cost? 



M. J.— O. 



Of course, if coal cannot be secured 

 and if fuel oil can be obtained at a 

 reasonable price, it would be advisable 

 to make the change. I am not able to 

 furnish an estimate of the cost of in- 

 stalling the necessary apparatus and 

 suggest that the figures be secured from 

 some firms in the business. 



HEATINQ SMALL HOUSE. 



I intend to heat with hot water a 

 greenhouse 23x65 feet, twelve feet to 

 the ridge and with three feet of wood 

 in the ends and sides and eighteen 

 inches of glass. I wish to maintain a 

 temperature of 55 to 60 degrees; the 

 thermometer here rarely goes below 10 

 degrees above zero. I intend to run two 

 2y2-mch flows on the purlin posts seven 

 feet above grade and to connect each 

 flow to three 2-inch returns under the 

 side benches about eighteen inches 

 above grade. Then I plan to sink the 

 boiler four feet deep in the pit, the 

 top of the boiler being about level with 

 grade. Do you think that will work 

 all right? I expect to run all pipes 

 about level. 



What amount of radiation, in square 

 feet, does this house require? I have 

 an opportunity to buy a new round 

 boiler rated at 850 square feet. Will 

 this be large enough? E. A. H. — Va. 



As an outside estimate, not more than 

 500 square feet of radiation will be re- 

 quired to heat the greenhouse described, 

 on which basis the heater mentioned 

 would have ample capacity. 



While it would be possible to heat 

 the house to 60 degrees with two 2Vi>- 

 inch flow pipes and six 2-inch returns, 

 the circulation will be improved if three 

 2^-inch flow pipes are used and it would 

 be preferable to use eight or even nine 

 2-inch returns. However, if the house 

 is well built and with an average ex- 

 posure to the prevailing cold winds, 

 there should be no difficulty in maintain- 

 ing a temperature of 60 degrees with 

 two 21^-inch flow pipes and six 2-inch 

 returns with a little extra attention to 

 firing when the outside temperature is 

 10 degrees above zero or colder. 



The fnU ■^f the pipes need be only one 



WHICH DO YOU WANT? 



KROESCHELL BOILERS hav* no bulky, soot-accumulat.ns 

 surfaces - you avoid tho disacrooablo work and trouble 

 indisponsable to doaninc boilors with complicated and 

 tortuous back and forth fire passages. 



NOT 



CAST 



IRON 



NOT 

 CAST 

 IRON 



The superiority of our boilers 

 has resulted in the removal and 

 abolishment of hundreds of 

 cast iron sectional boilers - in 

 every instance KROESCHELL 

 BOILERS Kive more heat with 

 the same piping with less fueL 



CAN SHIP 

 ANY SIZE 

 AT ONCE 



TELEGRAPH 

 ORDERS AT 

 OUR EXPENSE 



READ WHAT THE USERS SAY: 



Ca»t Iron Cannot Be Compared With Kroeschell. 



We bought a No. 2 Boiler in 1904. It takes care of 5,000 sq. ft. of glass, 

 and we could add 2,000 more. We are very well satisfied. We used a cast 

 iron boiler before we had yours. It cannot be compared with the Kroeschell 

 Boiler. Your boiler has certainly a great capacity for heating water. 



, Canada. 



Cast Iron Boiler Cracked in Two Years. 



We have a No. 4 Kroeschell Boiler. It takes care of 7,000 sq. ft. of glass; 

 it would take care of twice that amount.' 



I first had a new cast iron boiler, which lasted two years, when it cracked 

 to pieces. The second was a second-hand boiler. 



I consider your boiler the best paying investment ever made. 



You can refer anyone to us. 



, Ohio. 



Kroeschell Versus Cast Iron. 



The No. 7 Boiler I bought from you is heating 14,000 sq. ft. of glass; 1 

 think it can take care of 16,000 sq. ft. I do not have any trouble to keep up 

 temperature of 50° in the coldest weather. I fire only once after 12 o'clock 

 midnight. The boiler has given perfect satisfaction. I have four cast iron 

 boilers— like the Kroeschell best of all. If anyone wishes to inquire about 

 your boiler, let them write me, for I think your boilers are good ones. 



. Mich. 



WHIN YOU BUY -GET A KROESCHELL 

 THE BOILER OF UNEQUALED FUEL ECONOMY" 



KROESCHELL BROS. CO., *VHrc>5!?.Vtr 



