By the SightShield team · · 3 min read
Where AC power is wasted
In most Bangalore homes and offices, air conditioners are the largest electricity load. A large share of that power is wasted: ACs left on in empty meeting rooms and cabins, bedrooms cooled for hours before anyone arrives, ACs set to 18 °C when 24 °C is comfortable, and units running all weekend in closed offices. Smart control does not make an AC more efficient. It stops it running when nobody needs it.
Ways to make an AC smart
| Method | How it works | Best for |
|---|---|---|
| Built-in Wi-Fi AC | Manufacturer app controls the AC directly | New AC purchases |
| IR (infrared) controller | A small device that sends remote-control signals to the AC | Existing split ACs in homes and cabins |
| Smart relay or isolator | Switches power to the AC on or off | Forcing ACs off after hours; not for setting temperature |
| Building management integration | Central controller for VRF or ducted systems | Larger offices with central AC |
Rules that save the most
- A default temperature of 24 °C, as recommended by the Bureau of Energy Efficiency, with a limit on how low it can be set.
- Switch off ACs in meeting rooms and cabins when occupancy sensors see nobody for about 15 to 20 minutes.
- Turn all office ACs off at a fixed time on weekdays and keep them off at weekends, with a request option for late work.
- Pre-cool bedrooms for 20 minutes before bedtime instead of running from evening.
- Switch ACs off automatically when a window or balcony door is left open.
Seeing where the power goes
Energy monitoring shows the real consumption of each AC or circuit. Smart energy meters fitted in the distribution board measure individual circuits; smart plugs with metering work for smaller loads. A dashboard that shows which AC ran how many hours last week changes behaviour quickly, especially in offices, where nobody sees the bill. In homes, it often reveals a geyser or an old AC that uses far more than expected.
Realistic savings
Savings depend on how wasteful things were before. Offices that previously left ACs running in empty rooms and after hours often cut AC running hours substantially. Homes that already switch ACs off carefully save less, mainly through scheduling and temperature limits. Measure for a month before and after so the savings are real, not estimated.
Practical points
- IR controllers need line of sight to the AC’s indoor unit.
- Inverter ACs should be controlled through their own settings rather than by cutting power repeatedly.
- Keep manual remote control available for staff and family.
- Choose systems that keep schedules running if the internet drops.
- In offices, tell staff what the rules are and why, so they do not fight the system by covering sensors.
Worked example
An IT services office in Koramangala with 14 split ACs ran them from 9 am until the last person left, often late, and on Saturdays. We added IR controllers on each AC, occupancy sensors in six meeting rooms and cabins, a 24 °C default, and an 8 pm weekday cut-off with an override button at reception. Circuit-level energy meters on the AC distribution board showed AC consumption fall by about a quarter in the first full month compared with the month before.
Quick answers
Can my existing split AC be made smart?+
Yes. An IR controller can operate most remote-controlled split ACs from an app or schedule.
Does a smart AC controller save electricity?+
It saves by cutting wasted running hours and limiting low set temperatures, not by making the AC more efficient.
What temperature should ACs be set at?+
The Bureau of Energy Efficiency recommends 24 °C as the default.
Can I see how much power each AC uses?+
Yes, with smart energy meters on individual circuits or metered plugs.
Will automation stop staff from using the AC?+
No. Manual control stays available; schedules and occupancy rules just prevent waste.
Does it work with central or VRF AC systems?+
Yes, usually through the AC system’s own central controller or a building management interface rather than IR devices.