after the fire is well aturted and the flue is 

 sufficiently heated so that the entire air current 

 is upward. The smoke shelf might be sloped 

 slightly, in order that if any rain comes down 

 the chimney during heavy storms this moisture 

 would drain into the fireplace. 



In many fireplaces, a damper is desirable. 

 This damper should be installed as shown in 

 the detail and must open through the full length 



of the throat. The damper in the throat of the 

 fireplace is really only necessary in order to 

 close the fireplace during the period of the 

 year when the fireplace is not in use, and thus 

 protect the interior of the building against any 

 drafts of cool air, insects, etc., which might 

 come through the chimney. 



The flue is usually lined with terra cotta in 

 preference to any other construction. 



82 



