Greenwood Acoustic MA3051 over-2000 Switch live overide and back

Switch live overide and back draught shutters

VASF100B Silent Fan Basic 2 Year warranty

Using piston technology this is a compact

100% bypass

It has 19 pockets (including 2 long shank side tool pockets) interior and exterior pockets

Greenwood Acoustic MA3051 over-2000 Switch live overide and backGreenwood Acoustic MA3051 wall ventilator in white providing acoustic attenuation to Dn,e,w 55dB(A), suitable for external wall thicknesses of 140mm and above and can be installed in internal wall constructions of between 100 150mm. Equivalent performance 2500mm2. Supplied with internal controllable vent and white sand external grilles. Conforms to acoustic requirements of Noise Insulation Regulations (NIR) 1975, one of only a small number of products