126 



The Florists^ Reviev^ 



Fkiuuauv 17. 1921 



Greenhouse Heating 



Subscribers are invited to write the 

 editor of tiiis 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 help- 

 ful, also, to have a sketch showing the 

 location of the houses. 



TO HEAT CONCRETE HOTBEDS. 



I am going to build two concrete hot- 

 beds this spring, which will measure 

 10x50 feet, one foot high at the sides 

 and four feet at the ridge, with a 

 24-inch sunken walk tlirough the middle. 

 This is to be covered with hotbed 

 sashes, and all but a foot of the ends are 

 to be glazed. These beds are to be three 

 to four feet apart to allow removing 

 sashes on warm days or to harden plants 

 before setting them out, but will be con- 

 nected by a narrow boiler pit at the east 

 end. I expect to heat the hotbeds with 

 a liot water boiler, with a capac- 

 ity of 300 square feet of radiation and 

 2-inch*^ow and return tappings. 



What would be the best way to pipe 

 the beds? I should like to use 1-inch 

 pipes, for better control of temperature, 

 if it would be possible to get a good 

 circulation throughout. I shall attach 

 a Hercules circulating valve, which is 

 said to maintain a constant pressure 

 on the water of ten pounds. As I in- 

 tend to use these beds for forcing let- 

 tuce during the winter, I want to allow 

 for a toiiijioraturc fif GO degrees in zero 

 weather. .M. w.— Mich. 



We arc not familiar with the Her 

 cules valve, but if it will make it pos- 

 sible to maintain a pressure of ten 

 pounds, it will not only lessen the 

 amount of radiation needed, but will 

 greatly improve the circulation. We 

 should not attempt to use 1-inch pipe in 

 such a pit without attaching something 

 of that nature, unless it is ]iossible to 

 locate the boiler so that it will be well 

 below the level of the returns. 



If a pressure of ten pounds can be 

 maintained we should run a 2-inch main 

 flow pijie close under the ridge, merely 

 giving it a fall of two or three inches, 

 so that it will not pocket the air, and 

 at the other end connect with coils on 

 the side walls. Four 1-incli, three 1V4- 

 inch or two 2-inch pipes will be required 

 on each side of the pit. 



Another way would be to run a I'j- 

 inch pipe on each wall as a flow, and 

 connect with a coil of three 1-inch pipes. 

 Wo should suggest a larger boiler, since 

 fully 300 square feet of radiation will 

 be required for the two pits. 



PLANS TO HEAT TWO HOUSES. 



I should like some information re- 

 garding the heating of my two houses. 

 They are 20x44 feet and arc joined 

 together. I should like to know the 

 amount of surface to Iveat an<l the best 

 lines to run. My boiler has a 2i^-inch 

 outlet. 



I have six lengths of 2-inch pipe on 

 each side, one in (he center and one on 

 the outer, or east, wall, which total 4.32 j 

 feet of pipe. The boiler is connected 



BUY YOUR BOILER DIRECT 



TO THE MAN WHO DOES NOT OWN A KROESCHELI^Posslbly you may 



have wonilered why KROESCHELL Boilers are not sold by any of the Green- 

 house Building or Construction Compan'es. If so, we feel it is our duty to state, 

 in fairness and justice to all concerned, that KROESCHELL Boilers are never 

 sold by anyone hut KROESCHELL BROS. CO. We do not .luote anyone dealing 

 in Greenhouse material or boilers, special resale prices. We have no agents, 

 and therefore our prices are based on sales direct from factory to user. 



Our stand in this matter has brought out a lot of rivalry; nevertheless, tlie great 

 effic'ency of the KROESCHELL Greenhouse Boiler cannot be disputed, an<l in 

 spite of the increased competition, the KROESCHELL Boiler is luating more 

 glass than any other make. 



Our husiness (EST.\BLISHED 1879) is to build boilers of all type-, from the 

 -mallcst house heater to the largest 600 H. 1'. Water Tul)e Steam Huiler. Knr 

 icirty years we have confined our entire efforts to the designing and construction 

 111 high-grade boilers, and during this time have served the l"lorist~' Trade ol 

 tliis country and foreign countries, to the full satisfaction o! every mi.- of •■nr 

 customers. 



"The customer's interest llrsi " -is the basis of the KROESC'H Kl.I. standard. 

 This principle makes the Kl OKSCHELL Policy the most liberal of all in the 

 Cireenhoiise Boiler business. The great var ety of boiler.s that we make places 

 us in a commanding position. It is the KROESCHELL jirinciple to supply only 

 ihe type of Iniilcr liest suited fur the conditions. Kor tliis reason we always 

 furnish the most efficient boiler unit n every case. 



WHEN YOU BUY-arr A KROESCHELL 



Str««t 



KROESCHELL BROS. CO., ^HrcvSi,*. '.I'l* 



