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Air conditioning - Any recommendations please??

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Old 20-08-2012, 11:37 PM   #3016
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Piping issue

Hi Styledude,

Did he advised you to do pressure which is quite costly. Is it must to do pressure or simply change the aircon without any tests.

Lastly does the old piping probably for non inverter would be ok for new aircon mainly inverter one's.....

We probably having the similar situation...
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Old 29-08-2012, 12:13 AM   #3017
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Did i overkilled my rooms?

Hi all,

Urgent question... i am not sure that was i being conned to buying a oversized aircon or a good deal.

Last week, i went giant & was looking for a sys 3. I'm taking the MBR with my wife and the other 2 rooms will be tenanted to couples. I bought a Midea 28k btu system 3 (12+9+9) for my 4rm flat @$2388 becos it was on promo. The salesman was pushing higher btu compresssor becos it saves $$$ as the compressor work less harder that the 21k btu.

But when i see my floorplan, the room volume sizes is as follows:
1) Master brm - 3.2m(L) X 4.2m(b) X 2.8m(h)
2) 2 common rms - 3.2m(L) X 3.3m(b) X 2.8m(h)

Do i really save $$$ in the long run? Or did i overkilled my rooms and should call the salesman to downgrade to 21k btu compressor (9+9+9)? Price difference about $300.

Last edited by m_o_c_c_a_82; 29-08-2012 at 12:16 AM..
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Old 29-08-2012, 12:27 AM   #3018
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I using Sharp Plasmacluster Multi-Split (Inverter) Aircon ... System 2. I think it was less than 1.5K about 5 years back.
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Old 29-08-2012, 06:55 AM   #3019
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Hi all,

Urgent question... i am not sure that was i being conned to buying a oversized aircon or a good deal.

Last week, i went giant & was looking for a sys 3. I'm taking the MBR with my wife and the other 2 rooms will be tenanted to couples. I bought a Midea 28k btu system 3 (12+9+9) for my 4rm flat @$2388 becos it was on promo. The salesman was pushing higher btu compresssor becos it saves $$$ as the compressor work less harder that the 21k btu.

But when i see my floorplan, the room volume sizes is as follows:
1) Master brm - 3.2m(L) X 4.2m(b) X 2.8m(h)
2) 2 common rms - 3.2m(L) X 3.3m(b) X 2.8m(h)

Do i really save $$$ in the long run? Or did i overkilled my rooms and should call the salesman to downgrade to 21k btu compressor (9+9+9)? Price difference about $300.
not really. or else all the room will takes a very long time to cool down on a hot day. n the tenant wil sure complain to u. for sure all 3 rooms wil surely concurrently turn on almost everyday.
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Old 30-08-2012, 01:13 AM   #3020
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To m_o_c_c_a_82,

Mbr btu requirement ard 6720btu - 9k btu.
The other 2 rooms smaller, so 9k will be enough too.
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Old 30-08-2012, 03:15 PM   #3021
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To m_o_c_c_a_82,

Mbr btu requirement ard 6720btu - 9k btu.
The other 2 rooms smaller, so 9k will be enough too.
Bro Terumo,
The compressor only available in 21k or 28k btu therefore to be exact if use 21k btu compressor then every room is shared 7000 btu equally. So meaning that the 21k btu compressor is sufficient for all my rooms?

Becos i in a dilemma now as in of course 21k btu has lower consumption than 28k btu but if undersized does that mean the compressor has to work harder thus no cost efficiency?

If oversized, i not sure about how inverters work but non-inverters will cut in & out constantly if oversized & waste alot of electricity.

Any bros can give your reviews on that?
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Old 31-08-2012, 01:40 AM   #3022
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If u on all 3 units at the same time often, then get 28k.
If not get 21k will be enough.
Ur rooms require 6-7k btu, so 21k is enough, just that 28k btu compressor will cool down the room faster.
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Old 31-08-2012, 04:09 PM   #3023
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it also depends on if any of the rooms are facing the sun or have additional heat source in the room like computers etc. or how many people will be in the room. all these affects. Better to oversize then under. the inverter compressor can always spin slower to compensate but it cannot output more than what it is rated for.
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Old 01-09-2012, 01:32 AM   #3024
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Ink thinking of getting Toshiba system 3. Anyone got any comments?
Is it safe to hoot from GC? Their workmanship is ok?
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Old 01-09-2012, 12:01 PM   #3025
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Hi, i got the System 3 split unit and 1 split for the LR. Is 1/2 inch thickness armaflex good enough as insulation or should be thicker? MXY3A28VA(MSYGE13A x 2, MSYGE18A) plus MUYGE24VA (MSYGE24VA).

Deal made at 1/2 inch thickness installation. For all these, i expected a bigger truncking box. but it was the regular plastic trunking width (like that housing a 1-2 split unit) . The A/c ledge is beside my MBR and the point with the most piping into the house, is my mbr area. Curiously, is this possible? I can understand as the piping runs through the room, it gets lesser and truncking reduces. What at the onset in my mbr? I am just worried they have short-changed me somewhere. Moreoever, I was not there during the installation.

How to tell if the installer is using 1/2 inch thickness installation or not?
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Old 01-09-2012, 09:23 PM   #3026
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looking to replace my old mitsubishi sys3 aircon for a 4 room flat, budget of about 3k, the size of room is bigger than those newer hdb flats, 1 of the normal sized rooms is facing sun btw, any recommendations?
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Old 03-09-2012, 10:50 PM   #3027
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Hi guys, need some help with this BTU thingy. i'm intending to get system 3 for my new place. Usage mostly will be on the MBR and living room for soccer nights and mayb daytime if it gets warm inside the house. The other bedroom seldom use. So i would like to know if 9k BTU will be sufficient or should i go for higher BTU?
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Old 04-09-2012, 01:12 AM   #3028
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The insulation will state the thickness of it.

For the btu thingy, u can email ur floor plan or state ur room area, i can help you to specs the btu.
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Old 04-09-2012, 01:16 AM   #3029
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I got a quote for Panasonic inverter type + 12 BTU+9BTU+9BTU for $3100, including removing old system and install new, + GST. Is this a good price?

He also quote similar setup but Daikin or Mitsubishi Electic but for $200 more. Does these two brand worth the extra $200?

Model CU-3S27KKZ(Panasonic), 3MKD75(Daikin and 3S28(ME)

Also, existing system uses R22. It is ok to switch to R410?

TIA

Last edited by Leon; 04-09-2012 at 11:09 AM.. Reason: more questions
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Old 04-09-2012, 01:55 AM   #3030
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The insulation will state the thickness of it.

For the btu thingy, u can email ur floor plan or state ur room area, i can help you to specs the btu.
thanks aircon guru. i will read ur blog tml and try send an email to you.
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