1. To function without a fan, the soil gas ventilation pipe must be installed vertically (plumb); even warm air will not rise when channeled through a horizontal run of pipe like this. -->
<-- 2. The vertical, soil gas ventilation pipe must be installed within the conditioned floor area of the home; soil gas ventilation pipe installed in an exterior wall is typically too cold to function by natural convection. Most vertical ventilation pipes can be hidden within an interior wall.
3. A passive soil gas ventilation system is a formal building "system" and should be shown on the construction drawings for all floors. When the passive soil gas ventilation system is shown on the set of construction blueprints almost any worker can ensure that it is installed properly in the intended location. -->
<-- 4. The outlet of a passive soil gas ventilation system should penetrate the roof on the back-side of the home.
Be sure to clearly label the soil gas
ventilation pipe so it doesn't get confused with other utility systems. -->