Multi-Split A/C

[Galantspeedz]

Never go for Panasonic inverter! My friend changed his a/c to this brand and ended up part of the room cool and most part don't. It's set to 21 degree C with full fan speed but it doesn't help.

 

Complained to Panasonic and the technician advice is, "please turn on your fan at the same time in order to cool the whole room"... my friend almost exploded!

 

before he change, he got ask then go see his room need how high a btu anot... or he just go and buy w/o asking. or he see btu high, expensive so buy lower btu one.... i use pansonic ok leh... too cold in fact sometimes...

[Freestylers09]

panasonic is 1 of the good and cheaper brand nowadays..spare part also good..

 

if u want to get from Cserve..i can introduce u a CSO..u can call and find out more from her

[Silver_blade]

Never go for Panasonic inverter! My friend changed his a/c to this brand and ended up part of the room cool and most part don't. It's set to 21 degree C with full fan speed but it doesn't help.

 

Complained to Panasonic and the technician advice is, "please turn on your fan at the same time in order to cool the whole room"... my friend almost exploded!

Sounds more like a 'screw-up' on the installer part. Used the wrong unit for the room size. Honestly, you think anyone will make an aircon system that will only cool 1 part of the room and not the rest?

[Wrc206]

$ saving for inverter is true. Inverter systems are using R410 gases which are more efficient but also much more costly. One tank of R410 cost over $100 where else R22 cost only over $30+. Anyway, R22 will be phased out soon and they are targeting year 2010.

 

R410 has higher pressure and hence the need for thicker gauge for the copper pipes. Preferably get the installer to use 16mm for drain pipe instead of 13mm. Good insulation use for the pipes plays an important part to the performance as well.

 

Now current market most popular brands are Panasonic and Mitsubishi. I was told Pana is quieter and Mit is colder. Not sure how true but my buddy just installed Pana and its damn cold. Toshiba is good too.

 

Can try Gaincity for Panasonic and Mitsubishi. For Toshiba, try do a search for Long Heng Aircon Design. They use good quality materials for installations and reasonable pricing.

 

*I am not related to any of the above mentioned companies so please call only if you are comfortable.

[GoodCar]

Bro, your inverter system multi split is same BTU for every split unit? I went to coolserve.com.sg and saw they have different configurations e.g.

 

System 3, 5xxxx Btu X2 + 8xxxx Btu

 

Anyone using new Daikin Inverter, using new refrigerant R410A or R22 (freon)?

 

R22 will be banned from production from 2010 onwards hence i feel that the pricing for refrigerant top up will increase substantially onwards.

 

Mine was system 4, There are a few configuration I think, my configuration was approved for HDB.

I am not sure about the rating, but all rooms cool well including the master bedroom which is bigger.

 

 

[Civic6656]

before he change, he got ask then go see his room need how high a btu anot... or he just go and buy w/o asking. or he see btu high, expensive so buy lower btu one.... i use pansonic ok leh... too cold in fact sometimes...

 

He got it at GainCity and the salesperson told him that particular model is best suited for HDB. When friend asked him whether will it be cold enough, sales asked him "how big can a HDB room be"?

However when things got screwed up, GainCity push to Panasonic and vice versa for almost 6 months.

Few groups of technician came and go. Some says this a/c design is a screw-up and received many feedback from other users.

Some asked him to turn on fan at the same time. Some told him to turn fan to max at 21 degree C.

 

Eventually, the shifted the a/c to blow directly at friend's bed. Friend LL......

[Silver_blade]

This is a case of installer don't want to absorb the cost of a replacement and supplier don't want to point out the 'mistake' to maintain biz relation with supplier/absorb the cost cos it is not their mistake. In the end consumer 'agreed' to compromise and let the installer do what is the next best thing.

[Tiny_planet]

I have been using Mitsubishi Electric STARMEX System-3 for the past 2.5 years. So far so good, ease of cleaning. The sound level of the FCU is pretty quiet. I did simple cleaning once every 2-3 months. Set my temp @ 26-27degC every night.

 

 

[Kklee]

AFAIK, inverter system will only give savings if >1 room is in use.

 

For BTU rating, I feel it's good to have > 6500 BTU (normal room) and > 8000 BTU ( larger master bedroom). Besides room size being a determining factor, the no. of occupants in the room and other heat devices like computers or TV are heat contributing factors. Sometimes I wonder < 5000 BTU are being sold in the market... perhaps there are rooms smaller than HDB ones.

 

Inverter type is similar to cars... variable displacement compressor vs fixed displacement compressor (thermostat). The former is newer technology and "suppose" to offer better FC.

 

[Toalson]

Had actually changed my AC from R22 to R410 and didnt change the pipes as the vendor felt that it is ok. But he did a flush prior to the connection.

 

So far so good. In fact the AC is powerful that settings at 25 is good enuff; thus savings.

 

Its a Toshiba aka Carrier. Both same company if not mistaken.

[Wish1719]

you mean mak mi mi 河马 prodite, multi tua kang Porker and Picnic 06?

beri close..... except lamlam not 06..

[Sabian]

Had actually changed my AC from R22 to R410 and didnt change the pipes as the vendor felt that it is ok. But he did a flush prior to the connection.

 

So far so good. In fact the AC is powerful that settings at 25 is good enuff; thus savings.

 

Its a Toshiba aka Carrier. Both same company if not mistaken.

 

Might want to get a second opinion on the pipes from a trusted aircon tech on the suitability on the piping. (Not saying the first is dishonest)

[Sabian]

As I say above I do not have aircon at present but will install at new flat next year. Not neccasarily to use but to have available.

 

My belief is that we Singaporeans set our a/c way too cold, way way too cold and I will be buying a smaller a/c than recommended by sales staff.

That a/c when/if it runs will work harder and therefore more efficiently than the giant size aircons usually installed by Singaporeans.

The harder an a/c works the more efficient .

 

Harder does not mean more efficient. Working at the recommended load means chances of working efficiently is better.

 

[Haziqko]

Buy the inverter a/c if u r a heavy usage of a/c. Heavy i mean almost everyday of usage doesn't matter hot or cold u also on. then its best u get inverter.

 

if u use sparingly then just get the normal types.

 

if u rarely use, then can also get 2nd hand.

 

always get higher BTU so that your compressor doesn't need to run longer. longer means more bills. but yes a bigger BTU cost slightly more but cools down faster.

 

lastly, to all HDB residents pls don be so goondoo to install a/c in the hall/living rm unless your house got unique design for enclosures, if not u r just trying to cool down the kitchens + outside corridors also. i have many friends who regretted doing this stupid & costly mistakes.

 

trust me as i'm a technical person.

[Wave_rider]

I have been using Mitsubishi Electric STARMEX System-3 for the past 2.5 years. So far so good, ease of cleaning. The sound level of the FCU is pretty quiet. I did simple cleaning once every 2-3 months. Set my temp @ 26-27degC every night.

 

I am using a toshiba invertor System 3 for my 4 rm. 6 mth old system but much more powerful than my previous National used in my 3 rm flat.

My National was use in my 3-rm flat and needs to be set to 23 Degrees with full fan speed to feel the coolness.

My current Toshiba is set to 27 Degrees with fan speed 2/5 and i still eed a blanket to have a good night sleep.

Room wise , my 4-rm flat is bigger in size for the master room.

BTU is about the same.

[Little_prince]

most impt part is the piping and insulation... make sure its done properly...

 

if insulation not done well... alot of problem down the line such as not cold, leaking etc...

[Wave_rider]

Ha Ha ... talk abt that, I bought sys 2 for my 3-rm but end up installing in hall and master room.

 

Sale guy say ur 3 rm flat beri unique, think cannot get to the 2nd room. Ask me buy sys 1 instead or system 2 with window aircon for the next room.

I say nvr mind i buy sys 2 , ask ur installer come down assess then i will do on the spot. Installer see my flat layout. Says If follow ur way, i lay 23.5 meter of piping before reach ur 2nd room. Most like the room will take a very long time to cool (not energy efficient) and no guarantee will cool, If i want it my way got to sign a form that they have advise and I prefer my way.

 

In the end gave up. Install in Hall and have my air-con on a hot day.

[Kklee]

As I say above I do not have aircon at present but will install at new flat next year. Not neccasarily to use but to have available.

 

My belief is that we Singaporeans set our a/c way too cold, way way too cold and I will be buying a smaller a/c than recommended by sales staff.

That a/c when/if it runs will work harder and therefore more efficiently than the giant size aircons usually installed by Singaporeans.

The harder an a/c works the more efficient .

 

Setting the aircon too cold perhaps is due to sizing issue.... not cold enough, so set colder. If non-inverter type, if the compressor works harder, means it is always on all the time which doesn't save energy. You should want it to work less. Having a bigger capacity means do in the job in less time vs smaller capacity, do the same job but longer time.

 

You might want to compare the current rating of when 1xFCU is running between inverter and non-inverter type.