The following advice is recommended herewith free of charge and is for consideration only. Please consult a professional as and when appropriate. We do not accept any responsibility nor shall we indemnify against any person for any loss or dissatisfaction being suffered arising from the reliance of our advice.

Selection criteria
  • There are three standard criteria for checking energy saving: cooling capacity (BTU), energy efficiency ratio (EER) and the Energy Efficient Label (EEL).
  • Cooling capacity is measured in BTUs, and the larger the number, the greater the unit's cooling capacity.
  • Energy efficiency (EER) is calculated by dividing the BTU rating by electricity consumption. The larger the number, the more energy saving the unit is.
  • The EEL is issued by the Electrical and Mechanical Service Department after testing for energy efficiency. Air conditioners are rated from 1 to 5, with grade 1 being the most energy efficient.
  • The level of noise of an air conditioner in operation is also one of the selection criteria.


Maintenance tips
  • In summer, it is best to clean the filter every two weeks, to prevent dust from clogging the filter and reducing the cooling capacity.
  • To clean the filter, use liquid detergent and rinse thoroughly.
  • Heat cannot dissipate properly if the outside coils are blocked or covered, which will cause cooling unevenly.
  • When an air conditioner is switched off, it should not be re-started immediately. It is important to wait three minutes to allow pressure to be released from the compressor, to prevent damaging the unit.


General knowledge
  • A dirty filter will obstruct the proper flow of air, and excess dust may damage some of the machine's moving parts if the filter isn't cleaned for a long time.
  • The filter should be cleaned if the flow of cool air becomes weak or uneven.