Venting system. A direct-vent model that uses an already-existing chimney is generally significantly less expensive than installing a power-vent unit. Traditional water heater warranty ...

While electric water heaters typically don’t need venting, gas or propane ones do. The two types of venting systems are direct and power. Direct vent heaters use an exhaust pipe or chimney to ...

The vast majority of those emissions come from the energy needed to heat, cool and power buildings ... condensing water heater, you will need to completely change the flue gas vent system ...

Electric water heaters don’t require venting, but gas and propane water heaters need a direct vent, such as a chimney or pipe, or a power vent with a blower. Switching from one type of fuel ...