Why gas line & b-vent conversion works differently in Whitchurch-Stouffville
What makes gas line & b-vent conversion in Whitchurch-Stouffville unusual is not the technique, it is the age spread of the housing: a single route can cover 1910 brick and 2019 factory-built venting.
Air-sealing and window upgrades have made Whitchurch-Stouffville homes far tighter than they were designed to be, and a tight house starves a natural-draft appliance of the make-up air it needs.
Range hoods and basement bathroom fans routinely out-pull an older flue, so the house depressurises and the flue reverses — a Whitchurch-Stouffville problem that looks like a chimney fault but starts elsewhere in the building.
Across Stouffville, Musselman's Lake, Lemonville, Preston Lake and Gormley, the housing stock changes street by street, and the correct method changes with it. A century home with a soft-brick stack does not get the same treatment as a 2010 build with a factory-built vent — using one method on both is how systems get damaged.
the practical takeaway is that a gas line & b-vent conversion visit should start with an assessment, not a tool. Any crew that begins work before telling you what they found is guessing on your behalf.