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Energy Experts Finds Air Conditioning Running Overnight
Wasting Energy
25 July 2019

Kelcroft Energy Experts Finds Air Conditioning Running Overnight
Kelcroft Energy Experts Finds Air Conditioning Running Overnight click for larger image

Kelcroft's site monitoring revealed that the air conditioning, intended to operate during the day was also cooling the building at night, and at a lower temperature! The building owner was stunned.

Operating the air conditioning system unnecessarily wastes energy, and also causes a higher carbon footprint and higher maintenance costs.

Instead of "OFF" it seems that a lower temperature setpoint had been programmed for night time, and the air conditioning systerm maintained 21 degC over night.

The building owner said the AC systerm has been operated in that condition for the last 10 years, nobody knew. And it was solved with a few minutes re-programming.

John Herbert said "this type of finding is not unusual in our energy audit work, the real estate space has changed with buildings operated without supervision nowadays, too often wasting energy.

He said "We had also discovered an office building open 7am-7pm but the air-conditioning chiller plant was running 24/7 for no good reason, wasting energy"

Except data centres where air conditioning is provided to serve the equipment, the key point is understanding the conditions within the occupied zone, where the people are located, seems obvious right?


But often sensors are located at or near ceiling level, or worse installed in bad locations influenced by local heating from lighting fittings! so distorting the actual room temperature and causing everyone to wear a coat or scarf indoors.

To learn more call the experts today!

John Herbert energy saving solutions kelcroft

About the Author

John Herbert is a veteran chief engineer with more than 30 years international engineering experience, educated in the United Kingdom, he has worked in the United Kingdom and then across Asia for more than two decades engaged by international and local companies. He is a Hong Kong Registered Energy Assessor (REA), a BEAM Professional, and stationed in Hong Kong.

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tags: energy audit, sensors, Hong Kong, energy waste, energy cost
date: 16-04-21
kelcroft consultants hong kong