There are many product options which will provide passive ventilation for new build and existing homes. As this is a relatively new concept to New Zealand, we have recommended the following range of product options as a simple and effective guideline.
The products have been selected to achieve the recommended airflow for roof pitches above 15° (10,000mm2 lin/m) and below 15° (25,000 mm2 lin/m).
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The Manthorpe Circular Soffit Vents can be utilised for new build projects but are most commonly used as the easiest solution for existing soffits on houses with condensation problems. Standard fixing for this product is a simple push twist action into a 70mm hole drilled in the soffit board.
The vent features evenly spaced 4mm slots small enough to prohibit large insects gaining access but wide enough not to be blocked by debris, paint or water droplets.
This product should be used in conjunction with the Eaves Vent (EV25) to ensure continuous airflow into the roof void.
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