The best way to ventilate your sub floor is with air cross flow ventilation, letting nature do the work for you. Vents have no maintenance requirements and can be painted or rendered to suit your home.
So what is cross flow ventilation?
This means that air is able to travel through a brick vent on one side of the building through the sub floor and out the opposite side unimpeded. These vents must not be covered or concealed by gardens or landscaping.
Homes that are double brick, terraces, duplexes, have dwarf walls, mounded earth piles in sub floor, sloping blocks, stored goods in the sub floor will not be able to achieve proper cross flow due to the above obstacles blocking the flow and will require a fan to move the air. For more information on these systems, please visit our Fan Forced Ducted system page.
Clay/terracotta vents v brass wire mesh vents
Brass wire mesh vents allow a much larger volume of air to enter than the old style clay vents as the brass wire mesh allows almost complete air penetration through the mesh area. The vent is of cement construction and the mesh is corrosion resistant (Brass or Stainless wire)
Vents in bush fire zoned areas
Ember resistant vents are also available for homes in bushfire prone areas as required by council. Ember resistant vents have stainless steel mesh either instead of or in addition to the brass wire depending on the vent size for stability.