| This central welding fume exhaust system was installed by Total Clean
technologies in November of 2005. |
| The system operates with state of the art technology to minimize tempered
indoor air loss by having each |
| operator control the exhaust of the fume arm with an individual hood
mounted damper. When the |
| operator opens the damper, a speed control runs the motor/blower at a
sufficient CFM to supply the |
| needed exhaust air and no more. This minimizes indoor air loss and
negates negative air pressure while |
| still providing ample exhaust CFM to protect the workers breathing zone. |