Powered Draft System (Enervex / Exhausto Inducer + Modulating Control)

Roof-mounted variable-speed fan with a sensor control that mechanically pulls smoke up a stubborn flue and holds a steady draft. This is the last thing we reach for, not the first: nine times out of ten a height correction, a cap swap, or a properly sized liner fixes a draft problem for less money, so we diagnose the fault before we ever quote the fan. When the geometry genuinely cannot draft on its own, this is the engineered answer, commissioned so it actually stops the smoke-back instead of hiding it. We can look at the whole chimney and the vents while we are diagnosing.