Going ductless doesn't involve going through a major renovation. Fact is, there's very little mess at all. Nor does it mean sacrificing your room with a view to a bulky window unit. Instead, a ductless heat pump or air conditioner integrates neatly into your space. It's mounted high up on the wall, where it's least obtrusive - and most effective at quietly and gently directing treated air to every corner of the room. In commercial settings, there are options for wall- or ceiling-mounted systems - or even in-ceiling systems.