Aircon servicing

Whether it's cheaper to keep your aircon running all day or to turn it on only when needed is a common debate—especially during hot summer months when cooling bills skyrocket. The short answer? It usually isn't cheaper to run your AC all day. But like most energy-related questions, the real answer depends on several factors, including your insulation, the type of air conditioning system, outdoor temperature, and personal habits.

The Basics of Aircon Energy Use

Aircon use the most energy when they're first turned on. They have to work hard to cool down a warm space, especially if it's been left in the heat all day. This "startup surge" can give the impression that it's more efficient to leave the unit running constantly. However, after the room reaches the desired temperature, a well-functioning aircon cycles on and off to maintain that temperature. This cycling uses far less energy than running at full blast.

Still, keeping it on all day—even at a higher temperature—means your aircon will continue to use energy whether you're home or not.

Factors That Affect Cost

1. Insulation and Home Efficiency

If your home is well-insulated, it holds cool AC longer, reducing the need for constant cooling. In this case, turning your AC off or setting it higher while you're away is more cost-effective. Poorly insulated homes, however, heat up quickly. In such cases, it might seem like keeping the aircon running all day prevents a huge temperature swing—but you'll likely still spend more energy overall. View more

2. Outdoor Temperature

In extreme heat, your aircon will work hard whether it's maintaining a cool temperature or cooling down a hot house. But unless you live in an area with unrelenting heat, outdoor temps typically dip in the evening, which gives your aircon a break—if it's not running 24/7.

3. Programmable Thermostats

A smart thermostat can be a game-changer. You can program it to start cooling your home an hour before you return, making it feel like you had it running all day without paying for unnecessary cooling. Many smart thermostats also adapt to your habits, improving efficiency over time.

Pros and Cons of Each Approach

Running All Day:

  • Pros:



    • Keeps your home consistently cool



    • Reduces wear from frequent cycling on and off



  • Cons:



    • Higher energy consumption and bills



    • Unnecessary energy use when no one is home



    • Can strain the system if not well maintained



Turning It On Only When Needed:

  • Pros:



    • Saves energy and lowers your electricity bill



    • More environmentally friendly



  • Cons:



    • Temporary discomfort when returning to a hot home



    • Higher initial cooling load when turned on



Best of Both Worlds: Energy-Saving Tips

  • Use a programmable thermostat to schedule cooling based on when you're home.



  • Raise the thermostat setting by a few degrees while you're out (78°F when home, 85°F when away is a common recommendation).



  • Close curtains and blinds during the hottest parts of the day to reduce indoor temperature rise.



  • Use fans to circulate cool AC more efficiently.



  • Keep filters clean and ensure your unit is properly maintained for best performance.

Final Verdict

Unless you have unique conditions—like extremely sensitive pets at home or poor insulation—it's usually not cheaper to leave your AC running all day. With smart use of technology and a few strategic adjustments, you can keep your home comfortable without watching your utility bill skyrocket.

Contact information:

Call: +65 90235452  (or) Whatsapp us: https://wa.me/6590235452

 Mandai Estate, 

Singapore -729908.

Mail ID: info@coolcare.com.sg

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