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116 



The Florists^ Review 



Sbptimbib 2. 1920 



Greenhouse Heating 



WATER SEEPING INTO PIT. 



We have a great deal of trouble with 

 water seeping into our boiler pit. Fre- 

 quently a nearby river is higher than 

 the ground is at our place. Would it 

 be safe to have a pit only three feet 

 deep and to use a generator! Would a 

 mercury generator do, or would it be 

 necessary to use a pump appliance? 

 Our houses are 130 feet long. I shall 

 appreciate any information that you 

 may give me. J. W. B. — Miss. 



While a much better circulation can 

 be secured if the lowest part of the re- 

 turns is above the top of the heater, un- 

 der the conditions outlined you can con- 

 sider it safe to rely on a system of pip- 

 ing if it can be arranged so that the 

 return pipes are above the return ports 

 in the boiler, provided a mercury gen- 

 erator is used and the flow pipes are 

 carried overhead. It will be helpful if 

 either the returns are of the same num- 

 ber and size as the flow pipes or of 

 practically the same area in cross sec- 

 tion. Thus, for a house twenty feet 

 wide, to maintain a temperature of 60 

 degrees in Mississippi, you should use 

 four 2%-inch flows and either four 

 2^-inch or eight 2-ineh returns. While 

 a mercury generator will give good re- 

 sults under the above conditions, in a 

 large range you should secure circula- 

 tion by means of an electric pump. 



PIPING GBEENHOUSE. 



I am sending you a sketch showing 

 how my range is heated at present and 

 the position of a new greenhouse. Will 

 you please advise me how to pipe the 

 new greenhouse? Sometimes it is 30 

 degrees below zero here, but as a gen- 

 eral rule it is 20 degrees below in win- 

 ter. The heat required is about 50 de- 

 grees. We are planning for three 

 benches and four walks. There are two 

 boilers, connected by a header, tapped 

 for 2-inch and 3-inch pipes. We have 

 enough 2-inch pipe and headers, with 

 one 2-inch inlet and four 2-inch outlets 

 on hand if we could use them. The tops 

 of the boilers are three feet below the 

 returns. Are these boilers, Gurney 917 

 W, large enough? In the span-roof 

 house the five flows on each side rise 

 from the boiler to the south end of the 

 house, and the five returns run back 

 downhill. Would it improve this ar- 

 rangement to raise the five flows near 

 the boiler and let the pipe descend all 

 the way? G. E. F.— Can. 



The sketch shows the new house to 

 be 24x50 feet, with three feet of con- 

 crete and three feet of glass in each of 

 the walls. 



To heat the house to 50 degrees, un- 

 der the severe conditions mentioned, 

 you should use four 2-inch flow pipes 

 and sixteen 2-inch returns. The flow 

 pipes may be on the side plates and 

 purlin posts, and the four coils, each 

 containing four return pipes, could be 

 placed on the walls and under the out- 

 side benches. This will utilize the 

 headers and piping now on hand. 



While I do not recommend changing 

 the direction of the slope in the flow 

 pipes in the span-roof house, if a good 

 circulation is now secured, it could be 

 improved if the flow pipes were carried 



"Ain't it a Grand and Glorioua Feeling?" 



Heat Your Houses with 

 Kroeschell Boilers 



YOU'LL BE HAPPIER 

 YOU'LL BE RICHER 



TO THEILMAN 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 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 



TELEGRAPH 



ORDERS AT 



OUR EXPENSE 



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 

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 pletely beyond any other boiler. 



KROESCHELL BOILERS have no bulky, soot accumu- 

 lating surfaces— you avoid the disagreeable work and 

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 cated and tortuous back and forth passages. 



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

 hundreds of cast iron sectional boilers— in every instance KROESCH ELL BOILERS 

 give more heat with the same piping with less fuel. 



WHEN YOU BUY - GET. A KROESCHELL 



KROESCHELL BROS. CO. 



444 W. Erie Street 

 CHICAfBO, ILL. 



