You may have heard of ductless cooling systems, and you’ve probably seen the small, indoor devices installed high on walls. They’re renowned for their efficiency and versatility. Trust the professionals at Alternate Energy Inc. (AEI), a Diamond Contractor for Mitsubishi Electric, to provide you with more information.

Why is ductless superior to traditional A/C?

Traditional central A/C systems force cooled air from one central location. The complicated ductwork needed to deliver the cooled (or heated) air often is inefficient, restrictive, dirty, leaky and noisy.


Ductless technology completely eliminates the need for ductwork. The systems utilize one small outdoor unit and one or more indoor units, each of which has a fan and evaporator coil in the same enclosure. Requiring nothing more than mounting capabilities and access to electricity, stylish cabinets are available in wall mount, duct mount and ceiling cassette varieties.

They save money

Utility costs in Hawaii are the highest in the nation. When you’ve got an inefficient system, electric bills can add up fast. Ductless systems operate on less power — they are smaller than traditional forced-air systems and built according to ENERGY STAR® guidelines, and because the temperature-controlled air is delivered directly into a room, there is no loss in efficiency. Multi-split systems also allow homeowners to create temperature “zones,” to avoid cooling rooms that aren’t occupied.

Better air quality

With traditional A/C systems, ducts need regular professional cleaning. Even after cleaning, dust and allergens remain. Ductless systems offer multi-stage filtration that can drastically reduce dust, bacteria, pollen and allergens.


Not only is Mitsubishi well diversified and globally respected for its innovation and quality, but its high-quality electric products are backed by a century of research and innovation. AEI is proud to be one of Hawaii’s few renewable energy companies authorized and technically trained to sell and install Mitsubishi Electric products. In fact last year, AEI’s fully licensed HVAC journeymen and electricians installed more residential Mitsubishi Electric ductless A/C systems than any other energy contractor in the state. Best of all, as a diamond contractor, Mitsubishi A/C products from AEI now come with an industry-leading 12-year parts/compressor manufacturer warranty and a two-year workmanship warranty. Learn more at

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