It’s not. Wish it was ha ha It’s part of the HVAC system, a ‘cassette’. It’s like a self contained heater and air conditioner in one, like a mini split but it sits flush on the ceiling not on a wall that has venting to the outside. Downstairs has cassettes in each room, upstairs has a ‘normal’ central air type system, so a ‘dual’ system for the house if you will. Apparently they had no where to run ducting for the downstairs because we didn’t want floor vents, chases, nor ducting on the exterior.