106 



GENERAL SCIENCE 



The chimney should be built near the center of the house, that 

 it may not lose heat from contact with the outside cold air. The 

 general rule for building chimneys standing alone is to make the 

 diameter of the base, or the width of the side of a square chimney, 

 one-tenth of the height. 



Typical Warm Air Furnace Installation with inside air circulation 



The Furnace u looted near the center o/ the House with all heat pipes as nearly eyual in length OJ possible. 



The Heat i) distributed through a floor register, these are very commonly used for all first floor rooms. 



mere side vail vyistea are used a pattern should be selected that dots not restrict or contract the flow of air. 



One riser pipe will usually heat two small second story rooms as shown. , 



Qlfa room on the second floor is used only occasionally it might be. connected as shown: a better may mould be by a separate pipe. 



As the air in the rooms cools if falls to the floor 



The area of the recirculating duct must equal in croa xtion that of all the heat pipes. 

 The Furnace shown 19 an au cost iron pattern of heavy durable construction and having a self cieanna radiator. 

 It is designed to turn tither hard or soft coal its self cleaning ftatun making it especially daimbte uitKthe latter. 



With ordinary care it should give satisfactory service for more than twenty-five years. 



FIG. 84. Warm Air Furnace Heat, 



/t furnace Cased, before 



are attache*. 



