In some cases the refrigeration line tubing may be difficult to hide. Not ideal aesthetically because air blowers must be placed on walls.Costly to install, about 30% more than forced air, almost as costly as hydronic but maybe 10% less.Can combine heating and air conditioning in a single unit.More efficient & less costly to run than forced air, but not more efficient than hydronic.No ductwork needed, allowing mini splits to be easily added to any room where ductwork is not available or is impractical, for example additions & garage conversions.Most units handle two or three air handlers (or zones). Air handlers each have a thermostat allowing the room or zone to be heated or cooled independently. Mini Split systems, also known as heat pumps or ductless ac, pass heat from an outdoor unit through refrigeration lines to an indoor air handler. Will not operate off grid or during power outages unless the furnace & blower are both non electric.System must be properly sized to operate efficiently. Ductwork can also carry sound from any room throughout the house
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