Safety ·
Water Heater Venting Problems: Backdrafting and Carbon Monoxide Warning Signs
A poorly vented gas water heater can leak carbon monoxide into your home. Learn the warning signs and how proper venting prevents it.
Key takeaways
- Soot, scorch marks or melted plastic near the draft hood are warning signs.
- Install carbon monoxide detectors near sleeping areas.
- Venting must be sized and sloped correctly for your unit.
Gas water heaters create exhaust that must leave the home. When venting fails, exhaust can spill back into your garage or living space.
Warning signs
- Soot or black marks around the top of the tank.
- Melted plastic on nearby fittings.
- Rust or corrosion at the draft hood.
- A carbon monoxide alarm going off.
- Headaches or nausea near the unit.
Common causes
Disconnected or undersized vent pipes, improper slope, blocked flues and shared chimneys after furnace upgrades.
What to do
If a CO alarm sounds, leave the home and call 911. For other warning signs, turn off the unit and call us.
Get your venting checked
Venting inspection is part of every HOTCO service call. Call HOTCO at (916) 905-4468. We answer 24/7 and serve Roseville, Rocklin, Lincoln, Granite Bay, Folsom, Sacramento and the rest of Placer and Sacramento Counties.
Frequently asked questions
- Can a water heater cause carbon monoxide poisoning?
- Yes, if it is improperly vented. Proper venting and CO detectors are essential.
