If direct hang on the plaster board, after some time anchors will loose, especially on gypsum board.
U can try search "embedded ceiling fan"
is like a box fan, u need to open a square hole like for exhaust fan, then put the box fan there.

Image: https://down-my.img.susercontent.com/file/s...ze_w450_nl.webp

looks like an air con unit but only normal air... hehehe
thanks, will consider this as an option

u can see in many speed 99
works but not so powerful

https://forum.lowyat.net/topic/1650497/all

the distance between plaster ceiling actual celing is around 1'++ (my guess). mine is almost 2'++(almost 3', i think). worst i have no way of getting up there. apart a small hole on the plaster ceiling for wiring purpose.

Cut a hole

that would be the last resort.

as it is, i try not make big holes. cutting holes required me patch up and then need to repaint it.

too much work, i am trying to keep it as simple as possible, while searching for tips and ideas from sifos.

Use magnet to find where the plaster ceiling furring channel is.
Use wood that is long enough to bridge 2 furring channels.
The wood must also be thick enough to attach fan hook.
Cut hole at the fan base that is big enough for the wood.
Insert wood until bridged and the hook is protruding from the hole.
Screw through plaster ceiling and furring channel into wood to attach.
Attach fan and hope the fan base cover is big enough to cover the hole. Otherwise must patch.