Radon planning starts at the discharge point
When passive stacks cannot control the radon present in a given house, fan power is brought to bear. In the US the fans are required to be outdoors because most fans leak, but in Canada those outdoor pipes encounter condensation and ice problems. Hence in Canada it is strongly recommended to put the fans indoors and only use fans whose cases are sealed gas tight. What may surprise you is that since the entire radon control system relies on good planning and good workmanship to work flawlessly for the life of the house, the planning starts at the discharge point, despite the fact that the work starts under the slab.
This is the fourth of four technical radon videos.
Resources for Radon Fans
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