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The Florists' Review 



Septehbeb 14, 1916. 



ty valve above the expansion tank, 

 will this help the circulation any? 



W. D. B.— Ala. 



The description is so incomplete that 

 •we cannot be sure of the source of the 

 trouble. The difficulty described would 

 naturally result if the height of the re- 

 turns is not far from the level of fhe 

 grate in the boiler. The condition will 

 certainly be helped, and possibly cor- 

 rected,- if the changes suggested in the 

 inquiry are made. Unless the returns 

 are several feet above the top of the 

 boiler or a closed system is used, we 

 do not like to use 1*4 -inch return pipes 

 for hot water in , houses more than 

 forty or fifty feet in length. 



If the system were working properly, 

 there should be no difficulty in secur- 

 ing a temperature of 60 to 65 degrees 

 in northern Alabama with, the piping 

 described, provided there are twelve 

 1^-inch returns in each of the houses. 

 We would prefer, however, to use one 

 2^^-inch flow pipe and six 2-inch re- 

 turns for 60 degrees or four returns 

 for 50 degrees, and there would be no 

 difficulty about the circulation in an 

 open tank system, provided the lowest 

 part of the returns is higher than the 

 top of the boiler. 



WANTS HIGHER TEMPERATURE, 



I should like to have you answer this 

 heating problem for me: My green- 

 house is 48x140, with 5-foot walls and 

 a height of sixteen feet in the center. 

 The boiler is in a pit at the south end. 

 A hot water system is used. There are 

 three 2-inch flows and twelve 2-inch 

 returns. Each flow is attached to four 

 returiis. I have a 25-horsepower boiler, 

 with a generator, for the 7,000 square 

 feet gf glass. I have been growing let- 

 tuce in the house, but wish to change 

 the crop to cut flowers. Can I get a 

 temperature of 60 degrees at zero with 

 the present piping? If not, what 

 change would you advise me to make? 



A. P.— Kan. 



When using a generator, the heating 

 capacity of a boiler and radiating sur- 

 face, as compared with the effective- 

 ness of an open-tank system, will de- 

 pend largely upon the size of the boiler 

 and the skill of the fireman, and will 

 vary greatly, up to about twice the 

 heating capacity of the open-tank 

 system. 



However, we would consider that the 

 present radiating surface cannot be 

 made to furnish much additional heat 

 except at a considerable waste of fuel. 

 If the present system will furnish a 

 temperature of 50 degrees, about 

 thirty-three per cent additional radia- 

 tion will be needed to secure 60 de- 

 grees. This can be furnished by sub- 

 stituting 2^/^-inch for 2-inch pipes as 

 flow pipes, and adding three 2-inch 

 pipes to the number of returns. As 

 now arranged, each of the flow pipes 

 is carrying about 500 square feet of 

 radiation, which is generally too much 

 for 2-inch pipes. 



ADDING ONE SMALL HOUSE. 



I have a house 30x75, which is piped 

 for hot water and is heated by a 35- 

 horsepower boiler. I maintain a tem- 

 perature of 50 degrees in zero weather, 

 without forcing the boiler. The inlet 

 and outlet pipes of the boiler are 4- 

 inch. I expect to build another house, 

 16x25, parallel to the present one and 



M OR t HEAD 

 SYSTEM 

 FEEDINc; 

 BOILERS 



AT. 32C' 



The Above 



Temperature 



Record 



of condensation re- 

 turns from a steam 

 pump system was 

 taken under exact- 

 ly the same con- 

 ditions for both 

 pump and More- 

 head System. 



Between 2 and 2:30 

 p. m. the steam 

 pump was cut into 

 the line in place of 

 the Morehead Sys- 

 tem. 



Oh N6! 



— we don't want you to think that the above tem- 

 perature chart represents sreenbouse conditions 



—because this chart was taken on a high pressure line 



-but it brings out graphically the great advantages = 

 of the 



i:>8a di to Boiler I > 

 SYSXErM 



over a steam pump for steam line drainage and boiler 

 feeding. 



Substituted for pumps, the Morehead System will 

 keep all steam pipes clear of condensation and return 

 it to the boiler as pure, hot feed water quicker and 

 on 9J% less steam than a steam pump will do it. 



The installation expense is small— the results great. 

 It matters not whether your institution is large or 

 small, the Morehead System will save sufficient to 

 pay for itself in a few months' time. Letters in our 

 files prove this. Let us tell you about it. 



Morehead Manufacturing Co. 



Dept. "M' 



883 



Datroit, Michigan = 



