thanks so much for the info.
mine is Mits. electronic system 4 invertor model...R401 i think...
1) so, turning on the fan mode is still cheaper than turning on as 'aircon'? right?
2) as for cleaning, will servicing FCU more often help???
3) hse is really small, n didnt instal the ceiling fan or wall mounted fans during renovation...so seriously considering fully utilitise the aircon but worry of shocking utility bill each month...haaa separate standing fans make the rooms look messy too...