Any recommendations for a System 2 inverter? Previous owner of my flat had installed a System 3 to serve the 3 bedrooms, so now I want to install one more System 2 to cover the living hall (pending HDB approval). Thinking of maybe one ~9k BTU and one ~18k BTU.
Any suggestions on brands and installation companies? Thanks!
It really depends on your usage trends and room size.
By the rule of the thumb, the larger the room size the larger the BTU required to cool down the room (9K,12k,18K etc)
Other factors include morning/afternoon sun, design factors.
The size of the room aside, supposedly with the outdoor unit at total 27K~28K BTU, if you need to turn on all 3x9K at 1 go it can support.
However if your matching is something along the line of 27~28k BTU for outdoor unit and you have matched 1x12K and 2x9K indoor units then turning on all 3 units might affect the cooling efficiency. But if you only use 2 units at 1 time, say 1x12K + 1x9K = 21K or 2x9K = 18K then supposedly no issue to support.
Best person to advise will be your appointed installer.
Give them your room size and also tell them your usage trends during your purchase they will be able to better advise.
So if the outdoor unit has a lower BTU than the combined BTU of the indoor systems, would it still be able to support them when they are turned on together? Are there gonna be any potential future damage due to the extra stress on the smaller outdoor unit?
If that is the case why is Daikin offering an outdoor 18k BTU (3MKS50ESG) unit for its system 3 package? I had a look around and they are the only company doing this it seems. Rest of the competitors are all using at least a 26-28k BTU outdoor unit.
a sales guy told me that even if the condenser is 27k, and you have 3 blowers that are for example 9k + 9k + 12k=30k, once the rooms are sufficiently cool, the blower wont be blowing at the maximum 9k hence 27k condenser is enough. Is this true? Just that the rooms will take a bit longer to cool if on all 3 at once
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