Ubbink 150mm Sound Attenuator ubbink_ internal_grilles_and_valves 4eHT is a modern update

4eHT is a modern update of Greenwood Centair/CML offering improved energy efficiency

125mm Internal Diameter

Thanks to its Smart Remote control

Mechanical ventilation units make sound

DIMENSIONS: 240mm L x 160mm W

Ubbink 150mm Sound Attenuator ubbink_ internal_grilles_and_valves 4eHT is a modern updateIndoor 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