A submerged combustion glass manufacturing system comprising: a melter (110, 210) comprising a floor (112, 212), a roof (114, 214), a wall structure connecting the floor and roof, and an exhaust passage through the roof; a feed inlet in a feed end of the wall structure and a molten glass outlet in an exit end of the wall structure; one or more submerged combustion burners (104, 106) mounted in the floor (112, 212) and/or wall structure, the submerged combustion burners configured to discharge combustion products under a level of material being melted in the melter (110, 210) and create turbulent conditions in substantially all of the material; and an exhaust structure fluidly connecting the exhaust passage with an exhaust stack (116, 216), the exhaust structure comprising a barrier preventing exhaust material from contacting the outer atmosphere, the barrier defining an exhaust chamber having an interior surface, characterized in that the exhaust passage through the roof (114, 214) is positioned centrally or up to 25 percent away from the center between the feed and exit ends, the exhaust structure comprises an air inspirator fluidly connecting the barrier and the exhaust stack (116, 216) for inspiring air into the exhaust material, the exhaust chamber has a cross-sectional area greater than that of the exhaust stack (116, 216) but less than the melter (110, 210), and the barrier is configured to maintain temperature and pressure in the exhaust structure at values sufficient to substantially prevent condensation of exhaust material on the interior surface and let molten glass and other materials that get thrown up into the exhaust flow back down the interior surface of the barrier back into the melter (110, 210). a melter (110, 210) comprising a floor (112, 212), a roof (114, 214), a wall structure connecting the floor and roof, and an exhaust passage through the roof; a feed inlet in a feed end of the wall structure and a molten glass outlet in an exit end of the wall structure; one or more submerged combustion burners (104, 106) mounted in the floor (112, 212) and/or wall structure, the submerged combustion burners configured to discharge combustion products under a level of material being melted in the melter (110, 210) and create turbulent conditions in substantially all of the material; and an exhaust structure fluidly connecting the exhaust passage with an exhaust stack (116, 216), the exhaust structure comprising a barrier preventing exhaust material from contacting the outer atmosphere, the barrier defining an exhaust chamber having an interior surface, characterized in that the exhaust passage through the roof (114, 214) is positioned centrally or up to 25 percent away from the center between the feed and exit ends, the exhaust structure comprises an air inspirator fluidly connecting the barrier and the exhaust stack (116, 216) for inspiring air into the exhaust material, the exhaust chamber has a cross-sectional area greater than that of the exhaust stack (116, 216) but less than the melter (110, 210), and the barrier is configured to maintain temperature and pressure in the exhaust structure at values sufficient to substantially prevent condensation of exhaust material on the interior surface and let molten glass and other materials that get thrown up into the exhaust flow back down the interior surface of the barrier back into the melter (110, 210).