THE FULL IN5IDE: AREA OF ruUE.5 ^ 



MUST BEMAINTAINID AT ALL. POINTS. \ 

 IT THE WIDTH OF THE FLUES MU5T \ 

 DE DECREASED TD CLEJW TMSL HAY 

 CAKR.\r,Te TKACK.THE UEAIQTM MUST 

 BE. INCREASED AN AMOUNT SUfnciEWT 

 TO MAINTAIN THE, rUi_U [N5\DEAKEA. 



OPENING IN OUTTAKE 5HALL HAVE AN A^EA EQUAL TT 

 TO CLOSE OPENING W11E.N TJESULATING. VENTILATION. 



JAML5 IMPROVED VENTILATING 3YC>TE.n 

 COWS R^ING CC.NTE.R OF iy\-RN. 



