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This client was seeing high radon levels even with an active system so we replaced an older fan with a new more powerful fan and sealed the gap between the basement slab and foundation walls.
Radon fan replacement for a customer complaining of a noisy radon fan that was 13 years old.
New mitigation system install
Double fan replacement in Doylestown
The client had a dirt crawlspace so we encapsulated the crawlspace and then did a sub membrane depressurization system.