112 



The Florists* Review 



Fbbbuaby 1, 1917. 



gradual upward slope of the ground, 

 amounting to a little over three feet, 

 from the west to the east end. So I 

 have set the boiler on the surface of the 

 ground at the west end. Is not that the 

 same as putting the boiler down three 

 feet where the ground is level? Do you 

 think two 2^-inch flow pipes overhead, 

 ■with six 2-inch returns, would be suffi- 

 cient to hold a temperature of 55 degrees 

 here, in southwest Missouri? 



O. C. M.— Mo. 



There should be no difficulty in heat- 

 ing the house described to 55 degrees 

 with two 2iA-inch flow pipes and six 

 2-inch returns, sO far as the amount of 

 radiation is concerned. 



The three feet of rise in the pipes is 

 only equal to one and one-half feet so 

 far as its effect upon the circulation is 

 concerned, since it is the average height 

 of the pipes that must be taken into ac- 

 count. We would prefer to carry the 

 flow pipes upon the plates and the re- 

 turns either on the walls or under the 

 benches, but in order to secure a satis- 

 factory circulation with uphill flows it 

 may be necessary to run them about two 

 feet below the ridge. The returns should 

 be carried as high as possible, but even 

 then it would be better to drop the 

 boiler so that its top would not be more 

 than two feet above the floor of the 

 greenhouse. 



WHEN BOILEB IS EXTRA LARGE. 



We have built a greenhouse 12x56 

 and are putting in a Furman 6-section 

 hot water boiler, rated at 1,650. The 

 radiation for this house figures about 

 300 feet. We bought the extra large 

 boiler so we could build a larger house 

 later. We arc putting the boiler in a 

 cellar eight feet deep; this will allow 

 the returns to be about two feet above 

 the top of the boiler. We have run a 

 2-inch flow pipe through the center of 

 the house and connected it with nine 

 ly^-iuch returns, four under one side 

 bench and five under the other side 

 bench. Later in the season we expect 

 to put two 11/4 -inch returns in a hotbed 

 at the south side of the greenhouse. 

 These returns will be about one foot 

 lower than the returns in the green- 

 house. 



We are told that our boiler is so large 

 that the water will not flow, but will 

 foam and go out at the expansion tank 

 outlet. If that is correct, should we 

 reduce the radiation of the boiler by 

 running only a few sections of it? 

 Should the highest point of the flow 

 pipe be over the boiler or at the farther 

 end of the house? We could have it at 

 either place. We understand that the 

 expansion tank should be above the 

 highest point of the flow pipe. If so, 

 should it be attached to the flow pipe 

 or to a main return at the boiler? We 

 find so Tiianv differences of opinion on 

 where the tank should be attached, and 

 on the size of tank for this size of 

 boiler, that we are at a loss to know 

 what to do, as we have always used 

 steam heretofore. 



C. P. H. & S.— Pa. 



From the data given wc cannot deter- 

 mine what temperature is desired, but 

 if the amount of radiation has been fig- 

 ured correctly we would say that a 

 temperature "of 55 degrees could be 

 readily secured with 300 square feet of 

 radiation in a house 12x56 feet, pro- 

 vided there is no glass in the side walls. 



Particularly when the boiler capacity 



STEAM AND 

 AIR PIPE 



INLET 



"Detroit" Return Trap-the heart of the OUTLET 



"Detroit" System*. 



You can rely on your greenhouses 

 having a uniform temperature, 

 throughout, if you install a 



" DETROIT " 

 SYSTEM 



Condensation is handled automatically, 

 and returned to the boiler— hot. 



Write for Bulletin No. 19037 



American Blower Company 



DETROIT, MICHIGAN 



Branches Everywhere 



Mention The Review when you write. 



TUBING, ALL SIZES 



PIPE CUT TO SKETCH 



SECOND HAND PIPE 



Large stock, all sizes, furnished with new threads and couplings. 

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OAlVlbO r- unirriiriy Philadelphia, pa. 



Mention The Berlew when yon write. 



PIPK CUT TO 

 8KKTCH 



It -wVtX pay to 

 correspond T^itli ua 



Wrought Iron Pipe, Tubes and! Fittings 



New and jSecondHwid— Thoroughly overhauled, with new threads and 

 couplings, in lengths of 16 feet and over. Guaranteed to give satisfaction. 



ALBf RT & DAVIDSON, Inc., 256 284 Oakland SL-218 228 Kent St., BROOKLYN, N. Y. 



Mention The Review when yon write. 



