Most of the sound is come from the blower fan. Compressor itself is run very quite. Specially rotary type. Recipor type have more vibration due to the way it design. While rotary is run in eccentric way which less vibrate. But all this require a good quality compressor. It can further reduce the vibrate with the rubber damper at the compressor leg. I don't no what brand that make good compressor now. The pioneer and best is Panasonic for their rotary. Hitachi also produce compressor at their bangi factory.

For how a compressor vibrate and noise.... ehh... lazy to explain. It very technical and long explain. Boring to read also for ppl here.

Not sure which brand have actual DC rotary compressor. But most of the so call DC rotary is actually a AC compressor with DC inverter. The inverter is convert AC to DC to variable frequency than back to AC.

I won't place the outdoor unit opposite the wall. It
1) damage the look of the house. Freaking ugly pipe and wire spoil the house design and look like a factory.
2) noise and vibration that transfer through the wall an window. I can't sleep with it. Even how low the outdoor unit noise.
I place it far away at the water tank roof top side.

Bro from this, i found out Daikin / York / Mitsubishi for 1 HP

Daikin is at 10.38 EER
York at 11.41 EER
Mitsubishi at 12.79 EER

which means Mitsubishi power consumption lower... and will save more am i right??

My answer after place with DC inverter has been solved out whinning/humming noise at all

Ya lower power consumption would be the greater

I don't no inverter or non inverter have any loud sound coming out or not. Cause all the while, the outdoor unit place far away back from my room. It superb peace without the noise.

If your house are "big" for most single storey Terrance house won't be so lucky like you.

Either in front of car porch or at the back yard.

My house is not big really. About 1000sqf. I hate big house and am poor guy.

It is about how creative you hide and place something. If you know about the "character" of the aircon.

I have panasonic inverter AC and it have less humming compare to my neighbor's non inverter AC. Overall, inverter AC is still noisy if you are sensitive to sound. It's good to place ur external unit somewhere else.

It depends, it is prejudice on non-inverter.

My company has 2 non-inverter, after 5-6 years usage, just outside of the office wall, just operate normally, little noise.

Variable speed is not guaranteed to have longer life than non-inverter as well.

Inverter is good, but it doesn't means non-inverter out there are easily spoil, whimming produce lot of noise

Non-inverter fanboyism also can say, inverter PCB may easily spoil as well, while non-inverter doesn't have this part...

I have never heard of any inverter manufacturers claim
1. inverter compressor won't produce whinning sound on compressor, although yes, variable speed could make the whinning sound minimal.
2. Non-inverter compressor after using 1.5 years must hear sound. It depends.
3. Inverter lower fan motor won't easily create much than non-inverter unit

In actual fact, replace 6 years from now, is a good option.
As parts generally worn out over the time, be it bearing, mounting etc, also fungus growth inside blower, drainage etc.
Replace it every 6 years, ensure peach of mind the air-cond always working and in good condition.

It is needless to blast non-inverter until they are like not worth the money at all even though we know inverter has its advantage like 1
1. Less possibility of humming sound, but if part does wear out, it also can produce sound
2. Save electricity, but how much save, depends on the math
3. Potential durable than non-inverter, possible due to not running at full load all the time, but it doesn't mean a must, depended on quality built, as well as many factors.

If non-inverter is really so not worth to get it, by that time, then it will phase out itself, consumer won't buy it already.

This post has been edited by cherroy: Feb 24 2014, 10:41 AM

Ok you got ur point..

Usually Office envelopment will be higher noise level than housing.

Some discussion and debate only. Don't worry about it.

Just my 2sen bullshit only. Ha....

quite confusing about their catalogue..

there's power consumption and some of them didnt list out the power consumption..

im still in dilemma which 1 to choose, daikin or mitsubishi or york.. ~.~



This post has been edited by freestyler87: Feb 24 2014, 12:04 PM

Go for Mitsubishi electric inverter got easy clean, in future you should thanks me.
Now you still new dunno how dusty on blower after usage it long term

problem is the electrical shop only sell Mitsubishi Heavy Industry Air cond

Try to visit website and quote from nearest your house area.

Agree. Mitsubishi have a best easy clean aircon. Specially the blower side. Why others brand can't design something like Mitsubishi?

It take time to dismantle the flip and clean the blower. Difficult to reach the blower also.

I will get the Mitsubishi aircon for my next change.

How much you wanna paid for Trademark to ME?

What do you think of those extra feature in the air-cond? example samsung got those ionizer and kill bacteria/virus up to 99%. Got 6-in-1 features. Is it just a marketing gimmick?

Wah.. This simple easy cleaning also ME trademark liau?