Multilayer vent attached together by filter members

A method of making a building ventilation system configured to be mounted on sides of a building structure between rainscreen wrap and exterior siding of the building for venting air in a gap between the rainscreen wrap and the ventilation system including the steps of:

• providing a vent part including a plurality of vent passages, a longitudinal direction of the vent part configured to be mounted in substantially horizontal orientation at top and bottom edges of the sides of the building structure and a plurality of non-linear cross members extending between each ply, said plies and cross members defining said vent passages, and including two tiers or rows of vent passages, said passages running in a substantially vertical orientation to facilitate venting and draining of the gap;
• attaching a filter member to an outer side end surface of said vent part, said filter member being made from a resilient material, provided in a sheet form and being in contact with and covering outer openings of said vent passages;
• configuring said vent part with vent passages each having a substantially pentagonal shaped cross-section;
• configuring the vent passages of a top tier row of the vent part to be offset from the vent passages of a bottom tier row of vent passages on the vent part;
• configuring the pentagonal shapes of the vent passages of the top tier row to point downward and the pentagonal shapes of the vent passages of the bottom tier row to point upward;
• configuring bottom points of the pentagonal shaped vent passages on the top tier row to align with side edges of the pentagonal shaped vent passages in the bottom tier row;
• and
• configuring top points of the pentagonal shaped vent passages on the bottom tier row to align with side edges of the pentagonal shaped vent passages in the top tier row.