A ductless mini split is an air conditioner or heat pump that is installed with no ductwork. The indoor unit is mounted on the wall towards the ceiling and the outdoor unit looks similar to a traditional air conditioning unit. Mini split units are used for heating and cooling one room. One-to-one units mean one outdoor unit to one indoor unit. We can also install systems that include one outdoor unit and multiple indoor units. These systems work well in sunrooms, bonus rooms or areas of the home where it is impossible to install duct work. We’ve also installed several mini-split units in server rooms for businesses. Mini split units are very efficient and come as an air conditioning unit, or heat pump which heats and cools. Several models will heat down to -20 degrees in the winter.