Traditional vs. Power Vent Water Heaters

Choosing a new water heater is often less about the tank itself and more about how safely and efficiently it can vent combustion gases. That’s where the main difference between traditional (atmospheric) water heaters and power vent water heaters shows up—along with implications for installation flexibility and performance.

In general terms, traditional units rely on natural draft to move exhaust out of the home, while power vent models use a fan to push exhaust through the vent system. The right choice depends on your home’s layout, existing venting, and local code requirements.