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Electrician Talk Forum
Bathroom Extractor Fan Dripping
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<blockquote data-quote="SPECIAL LOCATION" data-source="post: 505048" data-attributes="member: 250"><p>I doubt that size of Axial fan is sufficient for the length of ducting and air it has got to push..</p><p></p><p>what extraction rate is it? If its anywhere around 80 or 90m3/hr</p><p></p><p>it's too low IMHO..</p><p></p><p>better with a Centrifugal fan that can shift 200m3/hr or higher..</p><p></p><p>ALSO..</p><p></p><p>how big is the ventilation inlet that allows air to get into the room for you to extract out?</p><p></p><p>e.g. gap under door or similar..</p><p></p><p>If you don't have the same size aperture allowing air into the room any fan will struggle moving warm moist air out..</p><p></p><p>Most 4" axial fans are only good for a 12" duct straight through an external wall..</p><p></p><p> Guinness</p></blockquote><p></p>
[QUOTE="SPECIAL LOCATION, post: 505048, member: 250"] I doubt that size of Axial fan is sufficient for the length of ducting and air it has got to push.. what extraction rate is it? If its anywhere around 80 or 90m3/hr it's too low IMHO.. better with a Centrifugal fan that can shift 200m3/hr or higher.. ALSO.. how big is the ventilation inlet that allows air to get into the room for you to extract out? e.g. gap under door or similar.. If you don't have the same size aperture allowing air into the room any fan will struggle moving warm moist air out.. Most 4" axial fans are only good for a 12" duct straight through an external wall.. Guinness [/QUOTE]
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