After discussion with my shortlisted contractor, decided not to reuse the existing aircon unit (Europace, 2-3 years in service) as I will be plastering the whole resale unit, trunking a bit ugly and uncertainty on the condition of the aircon/piping in general
Looking at System 3 to service the 3 bedrooms (Living room just ceiling fan):
MBR : 170sqft
BR2: 145sqf
BR3: 140sqf
Was reading up on sizing of the AC unit by BTU and got some conflicting views, the recommended BTU range from *35 to *65
If I use the *35 multiplier, 3 x 9000BTU A/C units would be more than sufficient
If I use the *65 multipler, I may need to get a 12000 for my MBR and 2 x 9000BTU for the 2 BRs
I think most of the Aircon companies seem to recommend the more kiasu *65 multipler, so that should be the safe choice right?
Considering to get a Daikin/ME 5 ticks unit so shortlisted the MKS65QVMG 21k BTU compressor unit as we would most likely be switching on aircon for 2 rooms at most at any one time, however if I scale up to 3 rooms next time would it be too small?