Case study — Montreal (1952)

C-NRPP certified case study

Radon mitigation — Montreal, 1952 home

Homeowner in Montreal (Grand Montréal): radon measured with an ionization chamber and electret detector before installing the mitigation system.

Before2180 Bq/m³
After48 Bq/m³
Reduction98%

The building

Year built: 1952
Basement: finished
multi-section slab
Suction: 3 suction points
Installation: 5 h
Investment: 3 499,99 $ + tax (standard)

Solution installed

Active sub-slab depressurization (SSD) by a C-NRPP certified crew. 3 suction points under the slab, connected to a sealed exhaust pipe; a fan creates negative pressure that intercepts radon before it enters the home.

Result

Confirmation test 48 hours after startup: 48 Bq/m³, well below Health Canada's 200 Bq/m³ action level (ideal target < 100 Bq/m³).

Maison — Montréal

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