space with negative pressure for an isolation room which option is applied is dependent upon whether the filtered air is fed from or expelled to the outside supplied together with these elements as a package is a detailed instruction manual with the emphasis on graphics for those unfamiliar with english rounding out the kit are the simple materials which could be useful in making the connections through the shell of the rooms or space being protected a master key identifies the part numbers on the drawings subsidiary portions of those parts are assigned letters number name 1 vent air intake or output 2 reducer vent hose 3 z plate 4 cover window pre cut vinyl with adhesive strip 5 hose 6 filtration unit 7 blower d c 8 battery 9 blower a c 10 blower hand bellows 11 cover hvac register 12 j bolt 13 collar connection hose 14 t bar 15 nut wing a housing intake b filter gross c stops travel d filter pre e filter hepa f shoulder sealing housing g seal lower hepa h filter adsorber chemical gas i seal upper hepa j housing output k seal filter upper adsorber l spacers tie rod m holes tie rod.