And so do hot exhaust gases from a water heater. But if an exhaust ... upward until it connects to a vent pipe running up through the roof. The hot flue gas rises until it safely exits the building.

What Is a Tankless Water Heater? Tankless water heaters take up much less space than storage water heaters as they heat the water directly. When you turn on the hot water, the cold water travels ...

Uniform Energy Factor refers to a water heater's efficiency when run under simulated heavy use conditions for a 24-hour period. Gas Tanked is part of the Water Heaters test program at Consumer ...