Natural draft opening definition
Natural draft opening means any opening in a room, building, or total enclosure that remains open during operation of the finishing operation and that is not connected to a duct in which a fan is installed. The rate and direction of the natural draft across such an opening is a consequence of the difference in pressures on either side of the wall or barrier containing the opening.
Natural draft opening means any permanent opening in an enclosure that:
Natural draft opening means any permanent opening, including doors and windows, in a total enclosure that remains open during operation of the lead emissions unit in the enclosure or enclosures and is not connected to a duct in which a fan is installed.
More Definitions of Natural draft opening
Natural draft opening means any opening in a room, building, or total enclosure that remains open during operation of the finishing operation and
Natural draft opening means any opening to the outdoor air in the Curing and Blending Building that is not connected to a duct in which a fan is installed.
Natural draft opening means any opening in a room, building, or total enclosure that remains open during operation of the facility and that is not connected to a duct in which a fan is installed. The rate and direction
Natural draft opening or "NDO" means any permanent opening that remains open while the facility is operating and is not connected to a ventilated duct. Garage doors, employee doors, and temporary openings necessary for maintenance and repairs shall not be considered as NDO, provided ASARCO keeps such openings in their closed position except when actually in use.