6500 (Rev. 03/04) BRYAN STEAM Steam Exhaust Heads Size ranges from 1"-24" Ik JE“. Bryan exhaust heads offer long term, maintenance-free service. The Exhaust Head Over 100 years ago, John J. Hoppes created his first exhaust head. Today, Bryan builds units based on this original design concept which has proven very efficient in thousands of installations through the years. The Best Materials Bryan exhaust heads are constructed of the finest materials. The fabricated carbon steel results