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122 



The Florists^ Review 



January 22, 1920. 



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 amoimt 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. 



HEATING LOW HOUSE. 



I have a greenhouse, 10x100 feet, 

 seven feet from the floor to the top 

 plate, with no side glass. The sash bars 

 on the north side are five and a half 

 feet; those on the south side, seven and 

 a half feet. The cement walls, one foot 

 thick, are two feet high on the north 

 side and one and a half feet on the 

 south side; they are well banked half- 

 way up. The liouse is partly protected 

 by buildings and is well glazed. In 

 order to maintain a temperature of 60 

 degrees in zero weather, how many 

 2-inch returns will I need with one 3^- 

 inch flow pipe? I mention those pipe 

 sizes because I have such pipe on hand. 



H. E. W.— N. Y. 



It will require about 425 square feet 

 of radiation to heat the house to 60 

 degrees with hot water. While it would 

 be better to use two 2il>-inch flow pipes, 

 placing one upon each plate, it will an- 

 swer to put in a S^^-inch flow pipe under 

 the ridge. In addition to the flow pipe, 

 use five 2-inch returns, placing the extra 

 pipe on the side of the prevailing cold 

 winds. 



The placing of a large flow pipe under 

 the ridge is not advisable, especially in 

 low houses like the one described. In 

 the present case, provided the top of 

 the heater is below the level of the re- 

 turns and provided there is no door in 

 the farther end of the house, it would 

 be possible to place the SVL'-inch flow 

 pipe under one of the side benches and 

 use it to supply at the farther end of 

 the house three 2-inch returns under 

 one bench and two under the one where 

 the flow pipe is located. 



FLOWS ON WALL PLATES. 



Last June I wrote to this department 

 in regard to heating a small greenhouse, 

 18x33 feet. I have instead built a house 

 18x50 feet, with thirty inches of glass 

 in the sides and a 10-inch concrete wall 

 two and a half feet high. The green- 

 house is fifty feet north of my residence 

 and will be heated from a hot water 

 boiler in the basement of my home. I 

 intend to lay out my piping according 

 to the plan suggested in the reply given 

 in The Review June 5, but there is one 

 thing that I do not understand. The 

 re])]y states that after the flow pipe is 

 run from the residence to the green- 

 house it should be carried up to a height 

 of eight feet, that at the highest point 

 a '^-ineli jiipe should be run as a vent 

 to the level of the ridge and that after 

 the air vent is taken off a 214-inch pipe 

 should be run to each wall plate. Now, 

 if I run the main flow up to a height of 

 eight feet and then run a 2Vj-inoh pipe 

 to each side wall plate, the only way 

 that I see to do that will be to drop the 



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a " The BoOer of Unequaled Fuel Economy " : 



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KROESCHELL BOILERS have no bulky, 

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The superiority of our boilers has resulted in the removal 

 and abolishment of hundreds of cast iron sectional boilers 

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Rose Range of Riverbank Greenhouses, Geneva, III. Charles McCauley, Supt. 



Heated by No. 15 Kroeschell Boiler, Kroeschell 2-inch Return Piping System and Kroeschell 

 Generator. Greenhouses each 28 feet by 200 feet. Garland Construction. 



The mains are arranged to take care of a future addition of 40,000 sq. ft. of Elass; 2-ineh returns are 

 used i,nruu(rhout the entire range and each 2-inch return line is controlled by 1-incn gate valve (strictly a 

 Kroeschell feature), insuring perfect control. Itis a gravity job; the circulation is perfect, reaching the ex- 

 treme ends of range in fifteen minutes. The Kroeschell Generator (the high speed gear for hot water heat- 

 ing) is also used for this system. 



"Your No. 15 Kroeschell Boiler heats our entire range. We maintain a temperature of 

 60 degrees in our greenhouses, and this temperature is easily maintained, even in the very 

 coldest weather. > our boiler has given entire satisfaction. It is the best and Quickest 

 heater I have ever used or seen. I have found the boiler very economical in the use of fuel 

 and labor, as it is not necessary to use the best coal, and any labor will do for a fireman. 

 The Kroeschell Piping System with Generator works like a charm. When I want to sulphur, 

 I can heat the water up to '230 to 240 degrees and I get the same results as from steam. See- 

 ing is believing— ail Growers are invited to call. Any further information concerning boiler 

 and piping system will be gladly given. We had a large number of florists at otu: place 

 recently, and they all thought we hail the finest equipped plant in the business." 



THE RIVERBANK COMPANIES, 

 CHARLES McCAULEY, Vice-Pres. and Mgr. 



WHEN YOU BUY-GET A KROESCHELL 



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 CHICAGO, ILL. 



