Under House Ventilation Sydney from EnvirofanCul-de-sac ventilation refers to an under house ventilation pocket of sub floor space which does not have any exterior vents on the external wall due to various factors: Factors:
To remedy this condition can be done by lowering the external ground level by retaining walls and installing adequate ventilation. There is an exception to the rule whereby flexible ducting would have to be utilised to extract the damp air from these 'dead spots' or 'dead area'. Dead meaning that air flow is non-existent. The Envirofan quad fan system as shown in the video is utilised for various reasons:
Application: At the problem area where the musty smell is most pronounced inside the dwelling. Where a brick size dual fan system cannot be installed on an exterior wall. Where discolouration (darkened appearance or fungi) on the soil is apparent as compared to other soil appearance in the sub-floor area. To ventilate at the centre of the dwelling (incidental to brick veneer construction) Located in the middle sub-floor area of the dwelling whereby fresh air can be drawn in through the existing exterior passive vents then extracted through the sub-floor ventilation system through ducting to the double brick size Envirofan passive vent mounted on the exterior wall. Designed to ventilate 'cul-de-sac' areas provided that there is sufficient sub-floor access. Envirofan Sub-floor Ventilation Sydney.
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