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Air conditioning - Any recommendations please??

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Old 17-08-2014, 06:09 AM   #4726
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Looking to purchase a Daikin system 3 for a 30-40 years 4 room flat. Is there a need for me to cough up extra for the larger capacity 3MKS71ESG box instead of the 3MKS50ESG version?

Should I also get the upgraded 1/2" 1 ARMAFLEX and G22 piping?

Lastly do I need a 15AMP power point or to replace my current system 3 steel bracket?

Usage varies minimally. 2 aircons will mostly be on every night (12-14hrs) while the third very rarely.

Last edited by derkaiser94; 17-08-2014 at 06:40 AM..
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Old 17-08-2014, 08:48 PM   #4727
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To Derkaiser94,
If u seldom use all 3 @ the same time, 3mks50 should be enough.
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Old 17-08-2014, 09:16 PM   #4728
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To Jazz15RS,
I will prefer Starmex.
Hi Terumo,

Thanks,

I am looking at the following specs, do you have any advices how much am I expecting? Those big stores typically sells at a range between 4k to 5k.

Want to know if I am able to get cheaper with cash payment though.

MISTUBISHI STARMEX SYS 4
MXY4A28VA
MSYGE10VAX x 3
MSYGE24 x 1

Am I able to get this at around 3.8k or lower at those shops?
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Old 18-08-2014, 03:02 PM   #4729
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Getting a system 3 inverter 27k in total . 9k each blower , isit enough (mitsubishi inverter)
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Old 18-08-2014, 03:10 PM   #4730
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Getting a system 3 inverter 27k in total . 9k each blower , isit enough (mitsubishi inverter)
9 x 3 = 27 lor..
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Old 18-08-2014, 03:21 PM   #4731
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Not pro in aircon is this enough for the room 9 k?
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Old 18-08-2014, 05:51 PM   #4732
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Hello Envyme,

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.

Best Regards,

Jason Tham


Not pro in aircon is this enough for the room 9 k?
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Old 18-08-2014, 08:48 PM   #4733
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Hi all,

I am being quoted for 4,500 for the following aircon spec by gain city..

just want to check whether is it expensive or am I able to get it cheaper at some other shops ?


MITSUBISHI DAIYA SYS 4
SCM80ZJS~3XSRK25ZJS~1XSRK50ZJS
SCM80ZJS-INVERTER
SCM25ZJS-INVERTER
SCM50ZJS-INVERTER
UPGRADE ARMFLX 1/2" SYS 4 (CLASS 1)
UPGRADE COPPER 23 TO 22 SYS 4
UNLIMITED PIPING
5 years warranty

thanks all !
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Old 19-08-2014, 07:09 PM   #4734
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Gain city getting frm bad to worst... If possible look ard for other better option...
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Old 20-08-2014, 10:57 AM   #4735
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Hi guys, i'm looking System3 for my new bto flat. Any recommendations? looks like Starmex is the popular choice? how much is the market rate right now to install Starmex system 3?
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Old 21-08-2014, 12:28 AM   #4736
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Hello Envyme,

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.
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.

Last edited by derkaiser94; 21-08-2014 at 12:31 AM..
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Old 21-08-2014, 01:45 AM   #4737
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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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Old 21-08-2014, 10:29 AM   #4738
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To crankcase,

How big is ur living room?
Living area is divided into 2 portions:

1. 3.5m X 3.6m = 12.6 sqm = 135 sqft.
I want to put a 9k BTU unit here, which is likely to be used periodically (weekends etc)

2. 4.6m X 5.6m = 25.76 sqm = 277 sqft.
I want to put a 16-18k BTU unit here, which is likely to be used infrequently (in case of gatherings etc)

Thanks in advance for any advice/suggestions!
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Old 21-08-2014, 01:38 PM   #4739
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To crankcase,

1. 3.5m X 3.6m = 12.6 sqm = 135 sqft.
I want to put a 9k BTU unit here, which is likely to be used periodically (weekends etc)
This area requires ard 9k btu.

2. 4.6m X 5.6m = 25.76 sqm = 277 sqft.
I want to put a 16-18k BTU unit here, which is likely to be used infrequently (in case of gatherings etc)
This area requires a 12k/18k btu.

U can do with 2 fancoil or 1 x 18k/24k fancoil will do too.
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Old 21-08-2014, 01:40 PM   #4740
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To Tomelankholy,

For 9 + 9 + 12, if u on all 3 units @ the same time, all fcu will perform like a 9k btu fcu.

Depending on your room size, it might take longer to cool down, if you on all @ the same time.

9k btu can cool down ard 15-18 sqm.
12k btu can cool down ard 20-24sqm.
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