SKU: 33440354000
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To achieve the longest duct run rigid ducting should be used and not flexible ducting
Transformer included
It has 19 pockets (including 2 long shank side tool pockets) interior and exterior pockets
100% bypass
w - to 42 dB(A)
Greenwood Acoustic MA3051 over-2000 To achieve the longest ductGreenwood 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
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