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Changes to Step #3

Edit by Guy Kuo

Edit approved by Guy Kuo

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[title] Sealed, Positive Pressure Protection
[* icon_note] Positive pressure, filtered or medically clean gas inflow maintains isolation just as in a conventional PAPR
[* red] Plastic bag completely encloses head
[* green] Comfortable, yet effective seal around neck with personal utility strap.
[* light_blue] Expiration is via one way valved ports. System is kept under positive pressure. In actual usage, the valves rarely actually need to close.
[* icon_caution] Warning: Do not seal bag until fresh gas inflow and expiratory ports are present.
[* icon_note] Photo shows older configuration with expiratory guide tubing,tubing and lower performance fan. With newcurrent blower fanfan configuration, expiratory guide tubing is no longer needed.
[* icon_note] Photo shows older configuration with expiratory guide tubing,tubing and lower performance fan. With newcurrent blower fanfan configuration, expiratory guide tubing is no longer needed.