Posted By Dana1 on 17 Aug 2015 05:53 PM
The Panasonics really are a single-room solution, but if you leave it on all the time and leave the doors open there will be convective air exchanges with the adjacent spaces.
The Lunos system effectively ventilates 2-rooms per pair. They operate by reversing direction every 70 seconds, so both rooms where they are installed get very good air exchange, whereas anything doored off from them, not so much. But two pair can be enough to ventilate a fairly large space if the floor plans are generally open, and there are no duct routing issues to worry about.
Additionally, you can "sync" two pairs of the Lunos E2's together on one controller. So, you can have two upstairs "pulling" while two downstairs are "pushing"...(and then they alternate of course..)