A couple of days ago I installed a ceiling fan in the living area. The fan is a DC motor fan, which is very quiet and efficient, far more than AC motors. It is a 6 speed and can move a lot more air than 4 or 5 small 12V fans and still don’t need more power. I connect the fan to the small inverter and we can run it when the air condition is not needed. We will also run it when we heat with the split system to get the warm air down from the ceiling. This can be done on level 1, which is the slowest. Running on high the maximum calculated weight on the fitting is 35 kg. This kind of weight is more than 4 small screws into 1.5mm fibre glass would be able to hold, especially on corrugations.
I made an alu plate from cutoffs I had from the main rails. Drilled 4 holes, cut a thread in each hole to hold 4 screws. The plate was meant to go on the roof for weight distribution. I used 6 mm neoprene tape to seal the area for the holes through the roof.
The top of the counter plate.
The screws are sealed with a polyurethane based sealer.
I drilled 4 holes through the roof and inserted the screws. The centre screw was used to pull the plate flat against the roof and press the seal tape. The mounting plate for the fan is fitted.
The motor is mounted to the mounting plate.
The motor housing is installed.
The blades are installed.
The bottom cover plate is installed.
The first image shows the small cable channel which covers the power cable.
The fan is controlled via a remote control.