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Ductless Systems Need Maintenance, Too

Monday, August 26, 2013

Ductless systems, a unique type of heating/cooling apparatus long favored in Southeast Asian and European countries, are fast becoming an increasingly popular choice here in the U.S. as well. Utilizing standard heat pump technology to provide the delivery of heated or cooled indoor air, ductless systems have an advantage over conventional heat pump systems in that they require no air duct installation. They are also:

  • Easier to install
  • More flexible in installation design
  • Less expensive to operate
  • More efficient
  • Easier to maintain

While ductless systems, like any other type of HVAC equipment, require a certain amount of regular maintenance to continue operating at top efficiency, several steps can be completed on a do-it-yourself basis. This includes, primarily, ensuring the unit is kept clean and that filters are inspected regularly and cleaned or replaced when required.

Most high quality mini splits incorporate reusable filters such as a hybrid catechin and a blue-enzyme filter. These can easily be removed and either vacuumed or washed with a mild dish soap, thoroughly dried and then replaced. This should be done at regular intervals of between one to three months, depending on how dirty they get.

Other cleaning steps include annual cleaning of the condenser unit located outside your home. This should remain free from vegetation or any debris that would restrict adequate airflow around the equipment. The unit should also be hosed off to remove any dirt buildup.

These DIY maintenance steps will help your ductless mini-split system run as efficiently and economically as possible, although additional annual maintenance should be accomplished but is usually best left to a professional HVAC technician. These steps include:

  • Cleaning the evaporator coils
  • Checking the indoor fan wheel in the blower assembly for proper balance and adjusting if needed
  • Checking that the outside unit is balanced and securely attached to its base
  • Checking the entire system for refrigerant leaks, repairing and then recharging as necessary

Since the 1950s, when Mitsubishi Electric Cooling & Heating developed the first ductless systems in Japan, use of this type of equipment has spread globally. Contact us here for information, advice or to locate the U.S.-based Mitsubishi Electric Contractor nearest you.  


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