Technical data: Cutout dimension: 28x28 cm, external dimension: 35x34,5 cm, roof thickness: 2,5 - 5cm, height above roof: 9 cm, inner frame: 32x32 cm 12V vent: 25 watts inout power, 1,9 amps maximum current consumption, 180 mm fan diameter, 50cm2 maximum ventilation Mounting advice: No drilling on the roof, inner frame is bolted directly to the outer frame
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