Portable environmental control system

A portable environmental control system for evacuating toxic, particulate laden or explosive gasses from a space, said system comprising:

• a flexible partition member disposed to delimit at least part of said space, said partition member including a port formed therein;
• a first flexible duct section connected to said partition member at said port at one end of said first duct section;
• a motor driven blower unit including a housing formed of a substantially non-sparking material, an inlet port in said housing, a discharge port in said housing, and a flow duct extending between said inlet and discharge ports, said inlet port being connected to said first duct section, said blower unit including a propulsion fan drivenly connected to an electric motor mounted in said housing of said blower unit by mechanical drive means, said motor and said mechanical drive means being isolated from contact with said gasses being evacuated from said space, said propulsion fan being disposed to evacuate gasses from said space through said first duct section and through said flow duct in said housing, conductor connections means for said motor including an explosion-proof junction box, and a power cord connectable to said blower unit at said junction box for connecting said blower unit to a source of electric power;
• a second flexible duct section connected at one end to said discharge port;
• a portable plenum including a port for connecting said second duct section to said plenum;
• and
• a plurality of filter units mounted in said plenum for receiving gasses evacuated from said space and for discharging air substantially void of particulates and/or toxic or explosive gasses from said plenum.