128 



The Florists^ Review 



Jandabi.27. .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. 



HEIGHT OF CHIMNEY VARIES. 



I should like to get information as 

 to the proper size of a brick chimney 

 for two horizontal tubular boilers, one 

 sixty inches in diameter, with forty 

 4-inch flues, and the other fifty-four 

 inches in diameter, with twenty-four 

 4-inch flues. Both boilers are sixteen 

 feet long. H. G. W.— Ky. 



While it is possible to approximate 

 the size of the chimney if the number 

 and size of the boiler flues is known, it 

 is helpful if the grate area is also 

 given. 



We judge that the capacity of the 

 larger boiler may safely be rated at 

 sixty horsepower and that the other 

 will have at least thirty-six horsepower. 

 For boilers of this size we should use 

 grates of from twenty to twenty-four 

 square feet and twelve to fifteen square 

 feet, respectively. The chimney re- 

 quired for such boilers will vary con- 

 siderably in its height. If there are no 

 tall buildings in the vicinity, a chimney 

 forty feet high and thirty-two inches 

 square inside would answer for the two 

 boilers. In case it is necessary to make 

 the chimney fifty-four feet high, the 

 diameter may be reduced to twenty- 

 eight inches. 



INSUFFICIENT BADIATION. 



I am building a small greenhouse, 

 14x32 feet, running east and west, with 

 three feet of glass in the south side and 

 with glass in the east end. There is a 

 workroom at the west end, with no glass 

 in it. The workrx)om is five feet high 

 to the eaves and nine feet to the ridge. 

 I want to put in hot water heat and 

 should like to know how large a boiler 

 will be necessary and how to pipe it to 

 the best advantage. 



I sliall have a .'?-foot bench at the 

 north and south sides and a 4-foot 

 bench in the middle. I should like to 

 have the house about 55 degrees at 

 night when the weather is 30 degrees 

 below zero, and as I have not had any 

 experience with hot water, I am at a 

 loss as to what to do with it. 



I was planning to have a plumber put 

 in the heating equipment. I expect to 

 run a 2%-inch pipe along the south 

 eave plate and return under the south 

 and middle bench with two 2-inch pipes. 

 I also planned to use a 2-inch flow on 

 the north eave plate and return under 

 the north bench. Do you think this 

 will be sufiScient to keep the house at 

 55 degrees! R. F. S.— Minn. 



Under the severe conditions men- 

 tioned, and especially if a minimum 

 temperature of 55 degrees is to be kept 

 up when it is 30 degrees below zero over 

 considerable periods, it will be neces- 



" Ain't it a Grand and Gloriotta Fmmling ?" 



Heat Your Houses with 

 Kroeschell Boilers 



YOU'LL BE HAPPIER 

 YOU'LL BE RICHER 



TO THE MAN WHO NEEDS A BOILER 



"The customer't interest first"— is the basis of the KROESCHELL standard. This 

 principle makes the KROESCHELL Policy the most liberal of all in the Green- 

 house Boiler business. The great variety of boilers that we make places us in a 

 commanding position. It is the KROESCHELL principle to supply only the type 

 of boiler best suited for the conditions. For this reason we always furnish the 

 most efficient boiler unit in every case. 



CAN SHIP 

 ANY SIZE 

 AT ONCE 



NOT 



CAST 



IRON 



NOT 

 CAST 

 IRON 



TELEORAPH 



ORDERS AT 



OUR EXPENSE 



The KROESCHELL has proven its worth in many of the large establishments in 

 this country. It has freauently been selected by the most careful buyers in 

 competition with all other types of boilers. Its efficiency and capacity are com- 

 pletely beyond any other boiler. 



KROESCHELL BOILERS have no bulky, soot accumu- 

 lating surfaces— you avoid the disagreeable work and 

 trouble indispensable to cleaning boilers with compli- 

 cated and tortuous back and forth passages. 



The superiority of our boilers has resulted in the removal and abolishment of 

 hundredsof cast iron sectional boilers— in every instance KROESCHELL BOILERS 

 give more heat with the same piping with less fuel. 2 



WHEN YOU BUY-OET A KROESCHELL 



KROESCHELL BROS. CO., 



444 W. Eri« Str««t 

 CHICAGO, ILL. 



