JOLI 14, 1910. 



The Weekly Florists' Review. 



65 



TUBULAR 

 BOILERS 



8TBAM AND WATKB 



Tba moat •oonomioal and etflolant 

 Boiler for Gr««n]iouae HeatlnB< 



JOHNSTON HEATING CO. 



131 East 26lh Street, NCW YORK 



Mention The Review when you write. 



3-iiich flow to supply the middle and the 

 south house. From this point I will run 

 two 2-inch flows in each house to the 

 other end, having the highest point at 

 the boiler and giving one foot of fall 

 for the 100 feet. From these I would 

 have two 2-inch returns on the north 

 side and one 2-inch return on the south, 

 with one foot of fall toward the boiler. 

 Do you think this would be satisfac- 

 tory? 



In using this system, how many air 

 valves would be needed and where 

 should they be placed? How high 

 above the highest point of the system 

 should the expansion tank be placed? 

 My boiler is rated at 2,525 square feet 

 of radiation. I am located in Maryland. 



E. A. P. 



The plan for arranging the main flow 

 pipes is a good one, but it will be better 

 to have three 2-inch flow pipes in each 

 house and the same number of 2-inch 

 returns, although it would answer to 

 'ise two 2-inch flows and four 2-inch re- 

 turns. Carry the flow pipes at least as 

 high as the purlins and, if possible, keep 

 the returns well up to the height of the 

 plates. Place the expansion tank as 

 high as convenient, connecting it to the 

 highest point of each main flow pipe, 

 which Bhould be directly above the 

 boiler. With the piping arranged in 

 this way, there will be no need for any 

 air valves. 



ONE IOWA HOUSE. 



We intend to erect a greenhouse, 

 18x80, and should like to know what 

 kind of heating plant you would recom- 

 niend. We wish to use an upright boiler 

 Jf possible. Which would you recom- 

 mend, hot water or steam? What is 

 the best way to pipe a building of this 

 size? Please let us know as soon as 

 convenient, as we are building our 

 house now. S. & L. 



While either steam or hot water could 

 be used in a house of the size described. 





earn i raps^ 



F 



iLORISTS everywhere are using Morehead Steam Traps. 

 A Morehead Return Trap installation is a proven eco- 

 nomic investment. It purges your steam heating lines 

 of all condensation, returning it direct to your boilers as pure, 

 hot feed water. 



The resulting uniform temperature in all parts of the houses 

 insures a better growth of stock, and a saving in fuel, water 

 and labor sufficient to pay for the installation in a few months. 



li 



A complete proposition and descriptive catalogue 

 will be mailed on request. 



I 



Morehead Mfg. Co.^S 



DEFT. "M' 



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