The Enervent Pinion unit is a very silent small unit best suited for apartments and other small spaces. The unit offers multiple installation options; it can be used as a stand-alone unit or it can be installed jointly with a cooker hood. The unit and the cooker hood can either be physically connected or they can be in different spaces and connected by a duct. The Pinion unit can be connected to many different external controls and it makes a cost effective choice for big projects in i.e. apartment buildings.