An Aircon (a/c) Question And Electricity

[Portlandstone]

Just started renting a small apt, 27sq m. Has a Daikin standard size a/c in it. I am usually perfectly happy using a standard desk or wall fan as I only need airflow on me to keep me cool, but as this will be short term rental haven't bought one (apt doesn't have one). The Daikin a/c unit has a "fan mode". Question, by using this "fan mode" does it use significantly less electricity say per hour than when using it in "a/c mode"? Would it make the difference in perhaps at least a few hundred baht per month or otherwise any substantial difference? Secondly, does it make any noticeable difference, when using a/c mode, to use a higher number such as "28 degrees" than a few less like "25"? Anyhow as I'm on a budget I don't mind a water and elec bill at five to six hundred a month but I certainly don't want to be much above 1000. If I knew I could save hundreds even just a month or two I might pick up a desk fan for 300, but don't want the bulk and am hoping the "fan" on the a/c unit is of similar elec usage. Any experience (i.e. anyone actually watched their elec bill and noticed?)

[Crossy]

A 'fan only' mode should consume considerably less power than the 'cooling' modes as the compressor will not run, so if the air moves in the right direction you should be good.

I'll move this to DIY for more answers.

[trogers]

The fan mode of the air will blow like a fan, but with lesser efficiency - small blades, high revolution. And it will collect dust during operation. So if you later use the cooling mode, lesser cooling efficiency due to dust, or you need to spend on getting it cleaned.

Better to spend the Bt300-400 on a table fan, which can be located where required.

Cooling a space is not just blowing cold air. It is a combination of lowering room temperature and humidity. If you set the thermostat to 28C, the compressor may not be running sufficiently long enough to extract excess moisture from the air. This is especially so if the room temp is at 29C before the cooling. Don't forget that most standard air-con needs a rise of 1C to kick start the compressor.

[lopburi3]

If it works for you go with it. But the air being blown by most a/c will be the hottest air in the room (near ceiling) and as said the fan is made for wide dispersion and what you want is limited blow on you. Fan mode will be much cheaper (although this time of year a/c may not even be required). Using a higher number would also be much cheaper than running at 25 normally (but this time of year may not make much difference).

[basjke]

You also can use your airconditioner in dehumidifying mode.Will make it feel cooler with less energy use then in cooling mode.