I am surprised this thread is still alive after so many complaints of Deka fan products.  The conclusion is:

1. Deka distributor in malaysia dun care shit about customers complaint. they never responded to any threads here.
2. Dun try to make your deka fan go faster by changing the cap. Look at all the fan blades fell off pic in the earlier posting.
3. Low quality product with high price tag. stick to the reputable brand.

I came here cause I was looking at Pana/KDK (kdk is under panasonic anyway) fan and my wife says they are ugly and prefer Deka...

After all the reviews here.. I think I'll stick Panasonic..

I miss National though... using their fan for 16 yrs now... zero problem .. still as strong as day 1 and zero humming/buzzing/strange sound...