Ceiling space as supply plenum?
Ceiling space as supply plenum?
(OP)
I have never before used a ceiling space as a supply plenum. The idea does not give me warm fuzzy feelings. I have a situation where I have a 6" ceiling space (including ceiling depth). Above is a rated ceiling/floor assembly with drywall on the bottom. The ceiling is a lay-in acoustical tile ceiling.
Any practical experience using this space as a supply plenum for a room?
Any practical experience using this space as a supply plenum for a room?





RE: Ceiling space as supply plenum?
RE: Ceiling space as supply plenum?
RE: Ceiling space as supply plenum?
The 5ish inch space is too small for duct. Why would you say it is too small for a plenum?
RE: Ceiling space as supply plenum?
Yes, it certainly will.
RE: Ceiling space as supply plenum?
what about return.
RE: Ceiling space as supply plenum?
Your ceiling tiles and drywall soffit will also reach moisture equilibrium with the ~90%RH supply air - something like 20% moisture content which will promote mould and discolouration.
RE: Ceiling space as supply plenum?
RE: Ceiling space as supply plenum?
RE: Ceiling space as supply plenum?
I can return from the wall. I can supply from the same wall, though it is at the end of the room (actually I have two locations and in only one can I supply from the sidewall). Or I can run duct in the floor assemebly above (which is wood open web and means a bunch of ceiling radiation dampers and awkward transition to the suspended ceiling).
RE: Ceiling space as supply plenum?
Also, how would you balance the air flow?
Drop the idea and go with ductwork.