Snow Blocking Furnace Vents? Heat and Safety Risk
Heavy winter storms create serious problems for your home heating system, especially when snow piles against your exterior furnace vents. Many homeowners do not realize how quickly this can happen or how dangerous it can become. When your furnace can’t breathe, it struggles to heat your home and burns more fuel than necessary. Blocked vents can also pose a safety hazard to your family’s well-being. Understanding why vents need clear, unobstructed airflow and knowing how to respond when storms hit gives you a safer, more reliable heating season. Why Furnace Vents Matter In general, snow blocking the vents is not an issue with traditional furnaces. This is because their exhaust is hot enough to melt snow before it becomes an issue, and they do not usually require a supply vent. However, high-efficiency furnaces capture more of the heat produced by combustion with a second heat exchanger. They also require a vent to bring in fresh air, which allows them to burn fuel more efficiently. Even several inches of snow around the vent openings can interfere with a high-efficiency furnace’s operation. Fresh air intake vents create the oxygen supply the burner needs, so any restriction decreases how clean fuel burns, lowers...
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