A dedicated compartment, separated from the engine room, is required for pressuring the supply fuel to the engine(s). The pump room shall be considered as a hazardous zone 1 area, unless quantitative statements are presented to prove otherwise, and require access through an airlock. Numerous safety requirements apply to this area, including means for fire- fighting, means for increased ventilation and gas detection, to mention a few.
Both the SPIRETH and Stena Germanica project have similar pump room design, although, for the Stena Scanrail it is combined with the OBATE plant (see Ch. 1.1.2).