

114 



The Florists^ Review 



NOTBHBBB 6, 1919. 



Greenhouse Heating 



TO BEMOVi: BOILER SCA1£. 



I have recently taken charge of a 

 range where the scale in the flues of the 

 boiler is so thick that I believe it af- 

 fects materially the boiler's capacity. 

 Is there a good formula for removing 

 this scale and what is the procedure 1 



H. G. H.— Kan. 



In the case of many large boilers it 

 is possible to remove a considerable part 

 of the scale by means of cold chisels. 

 The formation of the scale may be ma- 

 terially retarded by the use of some of 

 the boiler compounds on the market. 

 Many, however, consider that fully as 

 good results may be secured by placing 

 leeal oil (kerosene) in the boilers. The 

 use of a gallon for each forty horse- 

 power at first and then half that amount 

 every two or three months will have a 

 noticeable effect, both in removing scale 

 and in preventing its formation. 



ONE BOILER FOR TWO HOUSES. 



L • We have built two houses, one 17x50 

 feet with an 8-foot lean-to attached 

 without any partition and the other 

 25x50 feet. There are three feet of 

 , brick in the north wall, three feet of 

 ' wood and three feet of glass in the 

 south wall and three feet of wood and 

 the rest glass in the gables. A service 

 shed extends across the end of the first 

 house and ten feet across the second 

 house. We wish to maintain a tem- 

 perature of 50 degrees in the north house 

 and a temperature in the other house of 

 65 degrees. 



Please tell us the amount of 2-inch pipe 

 required for each and also the amount re- 

 quired if I use 2-inch pipe for flows 

 and 1%-inch pipe for returns. Would a 

 4-ineh pipe connected to the boiler sup- 

 ply the flows? The return into the boiler 

 will be about four feet below the bot- 

 tom of the benches. R. A. — Ind. 



In case 2-inch pipe is to be used for 

 both flows and returns, twelve pipes 

 will be required in the cooler house and 

 sixteen pipes in the bouse which is to 

 be kept at 65 degrees, using one flow 

 to three returns, or, if preferred in the 

 cool house, one flow to two returns. In 

 using 1%-inch pipes for the returns we 

 should suggest putting in three 2-inch 

 flows and eleven 1%-inch returns in the 

 cool house and four flows and sixteen re- 

 turns in the warmer house. 



While it would answer to use a 4-inch 

 main flow pipe to supply both of the 

 houses, branching into two 3-inch pipes 

 to supply each house, with return mains 

 of the same size, it would be better to 

 carry a 4-inch main from the boiler to 

 the warm house and a 3-inch main to 

 the cool house, with similar return con- 

 nections. Although the combined radia- 

 tion in the two houses will be less than 

 1,000 square feet, the circulation will 

 be quicker and better and with greater 

 economy of fuel if flow and return pipes 

 of ample size are used, especially in the 

 warm house. 



If the boiler were to be located at a 

 considerable distance from the ends of 

 the houses, thus making it necessary to 

 use mains of considerable length, it 

 would be advisable to put in either one 

 4-inch or two 3-inch mains to supply 

 both of the houses, but as the mains will 



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'Ain't it a Grand and Glorious Feeling ? 



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Heat Your Houses with 

 Kroeschell Boilers 



:you'll[be happier 



d lYOU'LL BE RICHER 



I TO THE MAN WHO NEEDS A BOILER 



'"The customer's 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 iboiler best suited for the conditions. For this reason we always furnish the 

 most eflScient boiler unit in every case. 



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CAN SHIP 

 ANY SIZE 

 AT ONCE 



NOT 

 CAST 

 IRON 



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NOT 



CAST 



IRON 



TELEORAPH 



ORDERS AT 



OUR EXPENSE 



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

 this country. It has frequently 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. 



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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 fire passages. 



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

 hundreds of cast iron sectional boilers— in every instance KROESCHELL BOILERS 

 give more heat with the same piping with less fuel. 



IWHEN YOU BUY-GET A KROESCHELL 



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- KROESCHELL BROS. CO., 



444 W. Erie Street 

 CHICAGO, ILL. 



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