Electricity Saving Tips For Homes And Offices

Various modes for running air conditioners and their impact on electricity bill

By on May 14, 2015

Air Conditioners in past used to be quite simple with just on/off switch and high, medium and low cool options. With improvements in technology, modern day air-conditioners have lot more electronics in it and thus they provide multiple modes of operation. Most of these modes are explained in the user manuals that come along with the air conditioners, but it is very important to understand the impact of each mode on electricity savings.

Air Conditioner Quick Cool

In this article we will try to explain various modes available in various air conditioners and will analyze their electricity saving potential:

Cool Mode

Cool mode is the regular or default mode in which the air conditioner runs as per the temperature setting and fans speed at which it is kept. Electricity saving potential in this mode depends on the temperature set in the air conditioner. Ideal temperature for thermal comfort and electricity saving is 25 degree centigrade (more details in our article: Ideal Air Conditioner temperature for electricity savings).

Fan Mode

In Fan mode the fan runs continuously and the compressor is off. This obviously has good energy saving impact because the compressor is switched off. Compressor is the most electricity-consuming component of an air conditioner. But the downside is that no cooling happens when compressor is off. It is better to use a ceiling fan in this case.

Dry Mode

There are days in a year when the comfort is low just because of the humidity. This happens more so in case you are located in a city that is closer to the sea. It also happens during monsoons. During those days just removing the humidity of the room provides a lot of comfort. Running the air conditioner in dry mode helps as it removes the extra humidity in the air. The fan runs at low speed and compressor is on for short duration in large cycles just to remove extra humidity. This surely is an electricity saving option during high humidity days as even the fan motor is running at a slow speed and even the compressor is on for smaller duration. The air conditioner does not blow a lot of cool air in this mode, as the intent is just to dry the air and not to cool the room.

Please note that it does not work as a dehumidifier (which has potential to make the air very dry) but is just good enough to make the room comfortable.

Energy or Power Saver Mode

In cool mode the compressor shuts off when the temperature reaches the level set in the thermostat but the fan keeps running. The compressor starts again when the room temperature increases. In the energy saver or power saver mode, even the fan switches off when the temperature reaches the level set in the thermostat. So how does it help save electricity?

  • Firstly it obviously saves electricity spent in running the fan continuously.
  • The use of fan in cool mode is not just to throw cool air in the room but it also helps in taking the indoor air for thermostat to check the temperature. In Power saver mode, the fan gets switched off for a few minutes and the thus the compressor does not start till the fan switches on again to notice that the temperature has increased. This increases the time between compressor cycles thereby making it run less and thus saving electricity.

Does it decrease comfort level? If the room is well insulated, then it may not. The temperature may increase slightly (not a lot) and if that does not disturb you then it is the right mode for you to save electricity. Also because the fan switches off and on, it makes sound every time it does so. If sound disturbs you in your sleep, then this may not be the right mode for you.

Quick Cool Mode

This certainly is not an electricity saving mode. In fact it consumes more electricity. Ideal temperature for air conditioning is 25 degree centigrade, but this option starts the AC at 16 or 18 degree centigrade. If the room temperature is 35 degrees then the time it will take to reach to 25 degrees will be the same in both Cool Mode and Quick Cool Mode (with high fan speed). In fact extra electricity is spent to get it down to 16 or 18 which is not required if you like to keep temperature at 25.

Sleep Mode

The Sleep mode increases the thermostat temperature by 1 degree after every hour till it increases temperature by 2 degrees. This will help save electricity if you like to sleep at low temperatures as you save electricity with every degree of increase in temperature. If thermal comfort is your only priority it is better to use cool mode or energy saver mode at 25 degrees.

6th Sense mode (for whirlpool ACs)

The whirlpool technology adjusts the fan speed (to high, medium or low) based on the temperature of the room. It surely has a benefit over the Cool Mode as it saves electricity on running the fan motor.

Is it good to have automatic filter cleaning feature in the air conditioner?

It surely is good to have such a feature in the air conditioner. A clean filter ensures smooth flow of cold air and room air, in and out of the air conditioner. This makes sure that the thermostat is able to sense properly and thus ensuring right operation of the air conditioner thereby saving electricity.

Operating Air Conditioner in the right mode can always help you save electricity, so please make sure that you choose the right one. We will keep updating this article as we research more on the modes and options available in air conditioners with different brands.

Here is a short video for tips to reduce power consumption of air conditioner in India

May 27, 2015

Which is best way to easy cutt of on ac or low level energy consumption mode if any

May 27, 2015

Sorry sir I tell abt my ac should not cutt off it am try another all modes then if continuous running on compresser if any time for cutt off level to reach it then eco mode and another modes are consumption the same unit no difference on eco mode I select icool mode 18 degree and eco mode 25 degree work in same consumption the same unit then give suggest to use ac low consumption of EB

May 26, 2015

Helo sir am using onida 1.5 ton 3 star rating split ac my complaints is should city of it try all mode but didn’t city off it on my room doors all of them tightly closed amnt use ceiling fan

May 24, 2015

Hi u prefer 25° to save power. My doubt is we use at 29° . which is better temperature to save power.

May 21, 2015

How to activate health mode and its utility.

May 16, 2015

Dry mode + eco mode vs auto mode… which is more energy efficient?

chandrapal singh
May 13, 2015

Somtimes my voltas split ac shows ES on display screen what does it mean? Is therr any. Problem with my ac?

May 11, 2015

How much time 1.5ton ac should take to coll down 150 sq feet Rome to 25 degree .its a whirlpool ac I runs ac all night on 25 degree but it don’t auto cut all night

May 10, 2015

Hi BB Team,

Thanks for reply however what i meant when i asked that question was, that provided that inverter ac’s will save electricity however if use the timer in which it will be cooling for 1 hour and then ( i am just guessing) it will be either power off or go to stand by mode… When the AC starts as per the timer then will it take a significant electricity to start back on ? or when its in stand by mode will it still be consuming same amount of electricity … In a nut shell will timer help bring more economy to my electricity bill ?

Today i again visit the market and checked some other ac’s again , so it will be daikin or Samsung. Now Daikin is experience and the delaer is pushing me for Samsung saying that it has 10 year compressor and 5 year condensor warranty on it. Do you think that its a better deal because he is offering this to me @45K which includes (3.5 mtr copper wire+free installation) however stand ,stabalizer and other accesories will be at my cost. Where as Daikin is 45K (includes copper wire) + installation+Stabalizer+Stand etc will be on me. Do you think its better deal than Daikin or is daikin still worth it… Please help me with you advise. Also you said that your personal favorate is Daikin, Could share any experience which made you inclined towards daikin. Thanks in advance BB team.

May 8, 2015

i have whirlpool 3 D Cool Delx Plus III Split Ac, it makes lots of noise during startup and cutoff it is normal or otherwise