Ubbink 125mm Sound Attenuator hood_type_wall utility rooms

utility rooms

screws can be undone but stay in place when you use the innovative 'stay open' internal hinge for easy wiring access

Zehnder Old P/N 990 326 121

GD8 90° bend

Ubbink 125mm Sound Attenuator hood_type_wall utility roomsIndoor sound is potentially a greater source of noise hindrance than outdoor sound as the insulation in buildings is improved. Mechanical ventilation units make sound, which may be experienced as noise hindrance, as they displace the air through the air distribution system. They emit sound by vibration and through the casing and the air distribution system. Sound is also generated as air travels through the air distribution system, including the