Natural Draft & Power Vent Hot Water Heaters
Natural draft water heaters are known for their simple design and low cost.
Power vent water heaters, on the other hand, use an electric fan to force exhaust gases out through a side wall.
Natural Draft
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Natural draft water heaters are known for their simple design and low cost. They rely on gravity and hot air rising to vent combustion gases through a vertical flue or chimney. Because of this, they don’t need electricity and will still work during a power outage. However, they tend to be less efficient and can be more prone to backdrafting, where harmful gases can re-enter the home if ventilation isn’t ideal.
Power Vent
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Power vent hot water heaters use an electric fan to force exhaust gases out through a side wall or roof. This makes them more flexible in where they can be installed and reduces the risk of backdrafting. They’re also generally more efficient than natural draft models. However, they cost more upfront, are more complex to install, and require electricity to operate—so they won’t work during a power outage.