http://buildingservicesforum.com/2009/05/11/mechanical-engineering/ For The Building Services Professional Tue, 17 Jan 2012 16:53:24 +0000 hourly 1 http://wordpress.com/ http://buildingservicesforum.com/2009/05/11/mechanical-engineering/comment-page-1/#comment-1829 Sun, 09 May 2010 12:42:52 +0000 http://buildingservicesforum.wordpress.com/2009/05/11/mechanical-engineering/#comment-1829 Can some one tell me the correct seperation for Suppy and Extract on an external elevation, i have confliting inflrmation, 300mm internl face to face is one, but not sure if this is correct, also i need to comply with BREEAM,

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