]94 



STATE HORTICULTURAL SOCIETY. 



FLOW PIPES 



COCO 

 AIR.CHECB! 



(F1G.SI6. — Sectionj)f Furnian Hot Water Heater, — Surface Burner.) 



In the rear portion of our lieater are three tubes corresponding to C, 

 Fig. 15 and D., Fig. 16, but differing in not reaching the bottom plate, 

 and in being large and flat. These form a sort of diaphragm and compel 

 the smoke and hot air to pass under and around, as in Fig. 16, instead of 

 over and between. The smoke pipe is attached at the top and rear 

 instead of the bottom as shown in the cut. Our heaters are also provided 

 with a check damper door as shown in Fig. 16, the real damper being in 

 the pipe. 



The return water from the coils enters the bottom of the rear tubes, and 

 being warmed it rises into the top at B. By the same means it circulates 

 through the other tubes and is brought in contact with the intense heat of 

 the fire. 



The hot water heater has a diaphragm in the top of the heater exactly 

 over the partition in the long droj) tubes, and in order for the water to 

 enter the central portion from which the flow pipes lead, it must first pass 

 around through the drop tubes. 



