Use google to search for BTU input. Some site have easy input and get the result immediately.

20c setting is very cool. If you still don't feel the cool, either your AC under capacity or cool air leaking.

Get a room thermometer and check the actual temperature. How much different between your setting.

Don't tell me you have ton's of fat under your skin.

There is no correct or not correct. If you comfort with it and don't mind the bill, that is ok. Just play with some setting what is the highest temp setting you can take. Probably you can save more bill.

It is not about new aircon. If you buy undersize, your aircon cannot reach the setting temp. Or cool air leaking out from some big gap. So to check the actual, you need some thermometer to compare. The setting temp and actual shouldn't run far away.

My room thermometer record at 26-27 when I set the aircon temp to 25. That I can know what is the actual room temp.

Cheap cheap lah buy at pharmacy or Watson or guardian. Electrical shop mostly sell the digital type.

Sorry not mind.

My room is cool enough and the aircon is alright with the size. Set 25c is the max I can take. (Before I feel hot) I need to consider to save bill also. Can't always think how cool I want.

My room thermometer already been place there for 16yrs. Never calibrate before. Don't no got give me wrong reading or not. Must check 1 day.

Ice water doesn't mean you can get 0c. If I haven't complete forget, you need to add some salt into the ice to be able to lower the temp to 0c.

Wait, where is my primary science book.

Yay. My science teacher coming back.

Just DIY 1 lah. Very cheap. A mist generator cost no more than RM20. And a exhaust fan to blow the mist out. Total cost no more than RM100.

Just a guideline for you. The lower the temperature, the more dry in your room. The aircon will reduce more moist. Higher temperature, more humid your room. Less moist is suck out.

So kimsim is asking you to increase the temp to 25c. So your room is more humidity. And probably solve your throat dryness.

But you may have feel hotter with increase temp. Probably you want as cool as 20c but at the same time don't lost the humidity. So that is OK just use the humidifier that you brought to increase the moist.

All compressor can last over 10yrs. Unless have some quality parts issue. I even have a reciporating compressor (fridge type) convert using for generate air that last 25yrs till now.

But as age goes by, the compression will be lower and lower. As the part will wear and tear and cause some air leak over. All this part inside is metal grinding metal when turn. It use oil to lubricate. As a result, the compressor take longer time to run and cost more for bill.

Rotary have a higher eer compare reciporating type. Which now all the aircon is using it. But abit expensive than reciporating type as the manufacturing it a bit difficult. But probably better now I guess.

Swing type is improving type from rotary. But generally still a rotary type. Just tha vane side is modify.

LG have a linear type of compressor. But use for fridge. Not sure about their aircon.

Scroll type is mainly for air compressor using in factory. And there are bigger hp. I never see it in aircon before.

Rotary is more compact with thin and longer. 2nd is reciporating which is fat but shorter. For scroll type, probably much more bigger. Because of the rotary design, it can squeeze inside the outdoor unit better. Whcih can made the outdoor unit smaller. Reciporating type is prefer for fridge because it much more shorter. Rotary cannot run by placing horizontally.

Any hr also can discuss lah.

So hardcore meh till specific what kind compressor inside aircon before can buy. As long as it have better BTU and last long. For the whole aircon, compressor is the most expensive part.

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.

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.

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.

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

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

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.