Zehnder. ComfoWell CW-S. Distribution box with built-in silencers. Compact, rectangular silencer with high-performance sound-damping channel and low pressure loss. The silencer can be used stand-alone or in combination with other components from the ComfoWell system. The airtight connection with other components is made by placing sliding strips over the grooves of the components to be connected. For maintenance and cleaning, the sound-damping element can be removed. Mounting on wall or ceiling is done using height-adjustable mounting brackets. The mounting accessories are included.