Axial fans and roof mounted extract fans the indicated values are determined by measuring the sound pressure level and sound power in db a obtained in a free field at a distance equivalent to twice the size of the fan plus the impeller diameter with a minimum of 1 5 m.
Roof mounted exhaust fan installation detail.
Piping penetration at wall.
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Rectangular transitions offsets and elbows.
Duct already wrapped in insulation at home centers.
Make sure you have all of the accessory items and that they are also damage free.
Before installing your roof mounted exhaust fan inspect the equipment for any interior or exterior damage.
Primary secondary chilled water instrumentation diagram.
Check for and retighten any bolts or screws that may have become loosened.
Relief and intake.
Pipe sleeve thru floor slab or wall.
Although this isn t always possible in attic crawl spaces you should always insulate the duct to prevent condensation problems.
Package dircet drive propeeler type wall mounted fan.
Plate and frame heat exchanger piping diagram.
The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood.
Radial roof exhaust fan detail.