Why a furnace exhaust leak is serious
A leaking or disconnected furnace flue can put carbon monoxide where it doesn’t belong. Here’s what we look for on every furnace — and why a CO safety test is part of the job, not an upsell.
What the exhaust flue does
Your furnace burns gas, and the flue (exhaust vent) carries the combustion gases — including carbon monoxide — safely outside. As long as it’s sealed and routed correctly, those gases never enter your home.
How leaks happen
Flues fail from corrosion, cracks, separated joints, or a disconnected vent pipe — sometimes from age, sometimes from a sloppy install. A cracked secondary heat exchanger can do the same thing from inside the furnace.
Why it’s dangerous
Carbon monoxide is colorless and odorless. A leaking flue or heat exchanger can let it spill into your living space, which is a genuine health and safety risk — not something to put off. Working CO detectors are a must, but they’re the last line of defense, not the first.
Why we test combustion and CO on every furnace
Before we call any furnace job complete, we inspect the flue and run a CO safety test and combustion check — and document the readings in your System Health Report. If we find a leak, we show you and fix it. That’s standard on every furnace repair and tune-up. Worried about yours? Call 801-960-5925.
Get a straight answer
Tell us what’s going on and we’ll give you honest options and upfront pricing — no pressure, no runaround.
See the difference a careful job makes
Real Canyon Comfort jobs from around the Salt Lake Valley.
Use the arrows to browse our work — tap a photo to read its story.