Ductless air conditioners provide several advantages over other types of air conditioning units. Because they don�t require ductwork, they are less expensive and easier to install. Unlike window units, they don�t obscure your view, require that a technician cut holes in your walls or enable unsecured access into your home or office. The compressor unit for a ductless system is placed outside the building. This eliminates the noise that you would normally have with a widow unit. The outdoor unit for a ductless system is also smaller and quieter than a central air conditioning system.