Condensation above false ceiling
Condensation above false ceiling
(OP)
We have air conditioned a car showroom, having 2" thick sandwich panel roofing. Below the sandwich panel, there is sloping false ceiling, made of aluminum tiles insulated with 10 mm thick closed cell rubber insulation with aluminum facing. The average height between the roof and the false ceiling is about 80 cm. The supply ducting is through a gypsum bulk head below the false ceiling and the return is also taken direct to the AC unit, below the false ceiling. The room design is at 23 deg C DB, 50% RH and the design ambient is 46 deg C DB, 29.44 deg C WB.
We are worried about the possibility of condensation above the false ceiling, especially during the peak summer. Can somebody suggest any solution?
Regards,
gmcshj
We are worried about the possibility of condensation above the false ceiling, especially during the peak summer. Can somebody suggest any solution?
Regards,
gmcshj





RE: Condensation above false ceiling
Other than that: Don't direct supply air onto the alloy faced false ceiling and minimize infiltration.
RE: Condensation above false ceiling
RE: Condensation above false ceiling
RE: Condensation above false ceiling
If you are designing, you can calculate duct insulation using higher relative humidity figures.
If that is built already, the best you could do is to open false ceiling space so that some level of natural ventilation occurs there, as humidity will be highest in space which is tight bu not resistant to vapor mass transfer.