| Portable ventilation blowers equipment could be set
up and rigged using the portable collapsible vent
ducting in three different ways: in the smoke-filled
space with exhaust vent duct hose running to the weather
deck; on the weather deck with suction ducting running
to the space; or placed halfway between the fire and
weather deck, with both suction and exhaust vent ducting
rigged. Placing the blower in the affected space and
pushing the smoke out provided the greatest amount of
air movement. Locating the blower on the weather deck
resulted in less air movement; however, it placed the
vent ducting under negative pressure and prevented the
spread of smoke to interior spaces if a hose leaked or
became disconnected. If a good exhaust flow path was
established, the blower was placed in the affected
space. |
