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Air conditioning - Any recommendations please??

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Old 02-12-2010, 10:04 AM   #1861
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I got another question.

Assume that I use back the old piping for the new R410A air con and later the old pipe spoil.

Can I then ask the contractor to install new piping which is not hidden (ie it is installed on the walls) for the aircon?

Sorry if this is a stupid question.

Thanks.
i believe there are no stupid questions, just stupid answers.

u can get contractor to install new piping on external trunking later, but do note that it'll prob be $150~200 per FCU (fan-coil-unit) installation of pipes.

and as pointed out by Kimsim, if the pipes were running R22. It needs to be flushed clean.

but my top concern would be pipes for R22 might not be as thick-walled as required for R410A. flushing the pipes, which i suspect is some sort of chemical clean, would prob attack the Cu pipes as well.

should u decide to reuse the old pipes, I would suggest you get the appropriate 'discount' from the installation since no piping would be done. then when the air-con doesn't get cold after a while and esp when the contractor kept telling you to top up the R410A (which is much more exp than R22 btw) gas, u know the old pipes are compromised and you're leaking refrigerant.
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Old 02-12-2010, 10:05 AM   #1862
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Yup yup... change the unit altogether with the piping. This is to avoid unnecessary cost when the pipe spoilt at later time.
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Old 02-12-2010, 10:05 AM   #1863
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If u change the quipment first, and rerun the pipes later, the cost is much higher. if changing pipes is not a big hassle (no concealed piping), change the pipes with the equipment.
expert is here.
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Old 02-12-2010, 11:32 AM   #1864
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who need to repair air-con or setup air-con units can pm me i have contacts for it.

Price is quite good. Serious peeps only.
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Old 02-12-2010, 04:23 PM   #1865
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Are you kidding? 13k BTU for a 14sqm room?
9k is more than enough man
dont waste electricity unnecessarily

Looks like quite big for your master bedroom size = 3.5x4m
I will suggest you quote for 13k BTU.
And 2 common room can use 10k BTU.
So total = 2x10+13. it is more efficient for keep faster cool down.
If not you will try to set at 2 speed fan and temperature to 23C.
At the your fan coil will be more noisy and usage more energy.
It's for my experience.
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Old 02-12-2010, 05:40 PM   #1866
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I really regretted choosing Panasonic non-inverter aircon! It is so noisy as compared to my previous 5 years plus Carrier brand.
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Old 03-12-2010, 01:12 PM   #1867
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Not expert lah. hee hee.
We share share knowledge...
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Old 03-12-2010, 03:10 PM   #1868
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Any promo for Mitsubishi Starmex sys 3?

Was thinking to go the GC @AMK this weekend.
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Old 03-12-2010, 05:50 PM   #1869
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need some advice from people here.

Been using a roughly 10 years old Mc quay (who uses mc quay air con!!!!????) from previous house owner.Planning to install a system 4 in my unit. 3 bedrooms and 1 living room. i think the living one will be seldom used so priority will go to the bedrooms and also will add a sliding door to the kitchen to prevent the cool air from entering. Attached is my floor plan. not sure are they in meter or feet? anyway was looking at these mitsubishi inverter models. Any advice which package should i choose? will the below choices be underpowered? Btw, current pipings is installed and hidden inside false ceiling, if i am to install the new one, will the installers help to hide the new pipings inside the false ceilings or install under the false ceilings? any help will be great!!!

1) Mitsubishi Electric
MXY-4A28VA / 3 X MSY-GE10VA / MSY-GE24VA
4,742 x 3 Btu/hr + 11,361 Btu/hr

2) Mitsubishi Electric
MXY-4A28VA / 3 X MSY-GE10VA / MSY-GE26VA
4,367 x 3 Btu/hr + 12,487 Btu/hr

3) Mitsubishi Electric
MXY-4A28VA / 3 X MSY-GE10VA / MSY-GE18VA
5,118 x 3 Btu/hr + 10,236 Btu/hr


Last edited by boxedfish; 03-12-2010 at 06:27 PM..
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Old 03-12-2010, 06:18 PM   #1870
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Option 1
To be enough for your whole unit cooling.
GE24VA install in living got wide and long function to be enough cooling your kitchen area when you can enjoy for cooking.

GE18VA FCU too small same like normal room size without auto swing air.

For using GE26VA model your living hall not enough long space to be blow out the cooling air you should feel it not satisfy.
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Old 03-12-2010, 06:24 PM   #1871
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Option 1
To be enough for your whole unit cooling.
GE24VA install in living got wide and long function to be enough cooling your kitchen area when you can enjoy for cooking.

GE18VA FCU too small same like normal room size without auto swing air.

For using GE26VA model your living hall not enough long space to be blow out the cooling air you should feel it not satisfy.
thanks for your recommendation! anyway, i will make a sliding door to the kitchen, will not need aircon while doin the cooking. anyone have more to add?
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Old 05-12-2010, 11:11 PM   #1872
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Use Daikin 4mkd75dvm. Ftkd25dvm for the 3 bedrooms. Ftkd50fvm for the living. R22 gas.
If you want ur new piping to be concealed in the ceiling, then the cost will be higher for opening/patching up the ceiling.
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Old 06-12-2010, 12:02 AM   #1873
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May I know what type of house you live in ? I notice that most of your bedroom area is very big and all bigger than 110m2.
Your bedroom area already bigger than my hdb flat leh.
Really elite.

need some advice from people here.

Been using a roughly 10 years old Mc quay (who uses mc quay air con!!!!????) from previous house owner.Planning to install a system 4 in my unit. 3 bedrooms and 1 living room. i think the living one will be seldom used so priority will go to the bedrooms and also will add a sliding door to the kitchen to prevent the cool air from entering. Attached is my floor plan. not sure are they in meter or feet? anyway was looking at these mitsubishi inverter models. Any advice which package should i choose? will the below choices be underpowered? Btw, current pipings is installed and hidden inside false ceiling, if i am to install the new one, will the installers help to hide the new pipings inside the false ceilings or install under the false ceilings? any help will be great!!!

1) Mitsubishi Electric
MXY-4A28VA / 3 X MSY-GE10VA / MSY-GE24VA
4,742 x 3 Btu/hr + 11,361 Btu/hr

2) Mitsubishi Electric
MXY-4A28VA / 3 X MSY-GE10VA / MSY-GE26VA
4,367 x 3 Btu/hr + 12,487 Btu/hr

3) Mitsubishi Electric
MXY-4A28VA / 3 X MSY-GE10VA / MSY-GE18VA
5,118 x 3 Btu/hr + 10,236 Btu/hr

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Old 06-12-2010, 10:03 AM   #1874
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Use Daikin 4mkd75dvm. Ftkd25dvm for the 3 bedrooms. Ftkd50fvm for the living. R22 gas.
If you want ur new piping to be concealed in the ceiling, then the cost will be higher for opening/patching up the ceiling.
why R22 gas? i read that it i being phrased out soon in the future
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Old 06-12-2010, 10:27 AM   #1875
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Actually used for R22 gas have to set lower temperature to force the cooling down it is not cold at all.
For example here set to 23C to compare set to 25C the cooling are still same why not get the latest models R410a can be save the world. Eco-friendly and Paid less electricity up to 65%.
For R22 only save up to 35-40% because it is not getting cold.
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