Did Air Cond DRY mode really save energy/electricity?

dry mode makes the internal fan run slower to allow more moisture condensation. this means the blower uses a bit less power (maybe 2-5 Watt only).

BUT: dryer air feels colder (it allows for better body cooling). usually 65° humidity air feels 2-3° cooler to humans than "regular a/c air" when you set the AC to 28°. so in dry mode you only have to chill the room to 28° to feel like 25°. that is where the savings kick in.i would recommend to you to try it. for our house many rooms are in dry mode at 29 or even 30 degrees and they feel cool. my home office ist @ dry mode 30°, temp is 29.7° right now and it feels cold. actually a bit too cold. need long sleeves

using dry mode, set temp to 27º and sometimes even 28º cause too cold
saves electricity for sure

This post has been edited by idoblu: May 26 2017, 10:18 AM

Very interesting topic. DRY MODE *Activated*

If a person very sensitive to dryness is not a good method. Skin can get very itchy, throat can get very dry (especially sleeping)

When I switch on a/c at night, I will turn on humidifier and set 50%, because anything fall below 40% humidity wife always complain of throat pain, and my kids always cough at night.

i dont think i would want to use dry mode for a setting of 22° or so. i can however tell you if you use it within 30-28° you end up with 70-55 % humidity which is a comfort zone and it _feels_ like 25° to the human body. this is how you safe. you dont need to cool the room as much as in cool mode. also the lower humidty prevents mold nicely.

How you know the humidity %?


Why not use 22°C or so?

you can use a hygrometer. 22° is a crazy cold setting - way too cold and to dry if you can actually get your room down to 22°C. you need to set the temp and humidty to a comfortable level and not chill down because you can. then when you go in and out you will get sick.

very technical discussion.."dry mode *activated* too"

22c not cold lah. I used to set 22, sometime 21. Only now with kids and my wife sinus, i set it to 23c + humidifier 45%

Dry mode may make one feel cooler, but will damage sensitive skin and also make your mouth feel dry.

not sure if its only me or not..but when i used dry mode at 26'c from 7pm-7am (my bedroom wall facing west side so it will be very hot when coming back to work hence the 12hour period AC on), sometimes i did wake up around 3-4am because i feel quite hot..for the 1st 6hours or so, it feel like 24'c or something with dry mode, but after that, it felt warmer..

p/s: there are many factors i guess..your blanket type, mattress type, room environment and so on..so i'm not sure if the warmer condition is because of dry mode on for too long or other reasons.

that is why you want to use dry mode with a higher temp setting. you can adjust until hygrometer shows 55-65 % humidity. room will feel cool and comfy then. there is no need to go down to 22° to begin with and that will cause you problems also if you leave the house due to the higher temp-difference.

To me 26c better don't switch on lah, at night outside already 28-29c if use 26 i feel stuffy. I will use ventilation fan and open up windows feel much fresh.

Just like in office, if go anything >24c, will be very stuffy.

Interesting topic.
Stuffy is becoz of high humidity, or maybe too still or dead air.. not much air movement.

I dont really know how aircon work in dry mode.. but dehumidification or drying the air can only be done by having low cooling coil temperature.. coil must be below room dew point temperature for condensation to happen, thus moisture is removed from the air.
But the main energy consumption is usually at the compressor. Compressor is the one that make the coil cold, thus it need to consume energy.

Anyway, anyone care to share the data/ finding of this by sharing the setting on aircon, data taken from elec meter and room temperature?

good topic , need more info

I am guessing the reason is in dry mode, humidity control is the parameter compare to cool mode.
Are u able to take the room temperature? Take room dry bulb and wet bulb temperature.
Google search if dont know how to take wet bulb temperature. From there we can see the humidity %.

Usually lower humidity result in better comfort when u sweat.

which is why dry mode @ 28/27 is working. its dry and you wont feel stuffy. no harm done - try for yourself.

i can give you a precise humidity level for my place as i use a high-end hygrometer: A/C (invertrer) set to 28°C - humidity 50%. since the A/C maintains the temp and not the humidity level (would be even better) the humidity can go up to 65% at 28° when there is plenty of rain. however like this no fugus issues and air barely ever feels stuffy. if to cold outside i just lower by 1 °C and it will be around 50% again.

This post has been edited by PJusa: May 7 2017, 03:07 PM

Never set AC from 16 to 20, will use more energy and stress the compressor. Set to 24 and wait for the air to cool down naturally.

agreed with you ... even daikin technician recommend me to set 22 .. most of the time i will go for 22 , sometimes 23