Between air-conditioners and RCACs, inverter air-conditioners and non-inverter air-conditioners, and different air-conditioners with various HP, it is common to get confused.
Let us walk you through on how to select a suitable air-conditioner!
First, look for the air-conditioner or RCAC with the suitable HP. See above image for details:
Inverter air-conditioner can adjust its compressor rotation speed to vary its cooling power, hence reduces energy consumption, unlike conventional ones which are required to maintain high compressor rotation speed. The below graph provides a brief overview of the mechanism of inverter air-conditioners.
The Consumer Council has examined inverter and conventiona air-conditioners in 2016, and discovered the former could save around 40% of the electricity cost per year on average. The difference on electricity cost could be up to HK$439. Given the limited price difference between the two types of air-conditioners, it is worth considering purchasing the inverter air-conditioner!
Level of energy saving between an air-conditioner and a RCAC with a Grade 1 energy label could still vary. You could calculate the efficiency by looking at the cooling capacity and estimated energy consumption on energy label. (See next article for detailed calculation.) You might be able to save more electricity cost by choosing one with a timer!
Lastly, location and installation of air-conditioner are also crucial factors. For more information, please feel free to visit CLP Customer Service Centres or reach us via Energy Efficiency (Product and Service) Hotline 2678 2626. We could help arranging a qualified technician for your air-conditioner installation.
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