144 



The Rorists^ Review 



Januaux 19. 1922 



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 de- 

 sired regarding the capacity of boilers, 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. 



HEATING A HOTBED. 



I plan to heat a hotbed, located on the 

 south side of my boiler pit, with steam; 

 this will be a double frame about 11x40 

 feet, with the ridge in the center. The 

 boiler is large enough and it has one 

 extra flow tap, but no return taps. I 

 plan to run a 2-inch flow eighteen 

 inches above the boiler and then 

 straight through the wall under the 

 ridge of the bed to the far end of the 

 bed. There will be two l^/i-inch returns, 

 one on each side of the bed, and these 

 will connect with a 2-inch return com- 

 ing from a 17x40-foot house. There is 

 no other way to connect this liotbed, 

 and I should like to know if it will work 

 by putting a check valve at the point 

 where it connects with the other return. 

 Will this arrangement heat the hotbed 

 to 40 degrees in zero weather? 



B. C. F.— Va. 



The amount of radiation suggested is 

 sufficient to heat the hotbed to 40 de- 

 grees in zero weather, and, in fact, a 

 1%-inch flow pipe with two 1% -inch re- 

 turns would supply the needed radiation, 

 provided the walls of the bed do not 

 have more than one foot exposed along 

 the sides of the bed and the walls and 

 roof are fairly tight. 



The only doubt as to the working of 

 the system, as explained, will depend 

 upon the water level in the boiler, as 

 compared with the height of the returns. 

 You cannot expect good results unless 

 the returns are two feet above the water 

 level or a steam trap is used to return 

 the drip water, with a pressure of five 

 pounds. 



OBSTRUCTIONS IN MAINS. 



I have a Weil & McLain steam boiler 

 in a garage, which is not giving satis- 

 faction. The plumbers have done every- 

 thing they can think of in an effort to 

 make it function properly, but they have 

 failed. The diflSculty experienced with 

 this boiler is that when it gets up about 

 two pounds of steam the water leaves it 

 entirely, causing the plugs to melt out. 

 This boiler is located in the basement 

 of the building and steams quickly when 

 the draft is put on. There are a 

 vacuum pump and tank in the basement 

 also, and when this pump is in operation 

 the water leaves the boiler more quickly. 

 The feed pipes of this outfit become hot, 

 but no heat will go into the radiators, 

 and the returns are never warm. There 

 are two 5-inch flows, which are reduced 

 to 4-inch a short distance from the 

 boiler. Would you tell me, if possible, 

 wherein the difficulty lies and what can 

 be done to overcome itf Should the re- 

 turns have swinging joints at the fit- 

 tings, like those used in a hot water sys- 



>^Your 1922 

 Coal Bill?? 



How much coal will be needed to 

 heat your greenhouses this year? It 



should not be difBcult for you to make a 

 fairly accurate estimate. No doubt the figure 

 is not pleasant to look at, but if you find that 

 your coal bill is a parasite on your profits, 

 why not give it the serious attention it de- 

 serves, and make some effort to reduce your 

 fuel expenses? 



If you are using a Kroeschell Boiler 

 it is safe to say you are satisfied, but 



if you have no Kroeschell Boiler you can cut 

 down your coal bill and save a good share 

 of your 1922 profits by installing the "Boiler 

 of Unequaled Fuel Economy." 



The Kroeschell Boiler has enjoyed 

 the reputation of being the greatest 



for greenhouae heating. Its durability and 

 efficiency have made it the favorite among 

 the leading greenhouse men everywhere. 

 You can make 1922 more prosperous by re- 

 ducing your coal bill with a Kroeschell Boiler. 



Order Your^Kroeschell Boiler 

 byJTelegraph or Telephone 



Telegraph or telephone your order to us at our ex- 

 pense. Long Distance Phone, Superior 8680; ask for 

 greenhouse department. Your order will be filled at 

 once. We can ship any size or style of boiler you want. 



KROESCHELL BROS. CO. 



444 W. Eri« Str««t 



CHICAGO, ILL. 



