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Home > Service & Support > Troubleshooting > Why is an anti‑backwind cap required for a gas water heater?
Question: Why is an anti‑backwind cap required for a gas water heater?
Answer:

The anti‑backwind cap is a key safety device with two main functions:1. Safety protection: In windy weather, it prevents exhaust gases such as carbon monoxide (CO) from flowing back indoors, avoiding poisoning risks;2. Equipment protection: In winter, it blocks cold air from entering the unit, preventing freezing and cracking of the water tank and pipes.

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