Can I use the ceiling void as a return air plenum? Whats the best tile to use?
In principle the ceiling void can be used as a return air plenum provided this is acceptable to the architect and/or M&E engineer. There is no “best” tile for this as it will depend upon the permitted air leakage through the ceiling. We have air leakage data for some of our ceilings. Our low density (soft fibre) ceilings are unlikely to be suitable because of their porosity.
