How to Install a Power-Vented Water Heater | Family Handyman

Home Plumbing Water Heater How to Install a Power-Vented Water Heater

Power vents simplify a gas hot water heater installation

Power-vented water heaters work the same as ordinary water heaters, but the exhaust gases are blown out with a small fan instead of rising upwards through metal pipes.

The hot exhaust gases from a natural-draft water heater rise through an open draft diverter and out through a metal duct.

Natural gas or propane hot water heaters are generally less expensive to operate than electric heaters, but installing a standard vent in a house without an existing chimney is expensive.

Its easier to run the vent if you install a power-vented type of natural gas (or propane) water heater. This type of venting system is different from what you see on most gas water heaters. Most have a natural-draft type of vent, where the hot waste gases rise through an open draft diverter and into metal pipes,which eventually lead to the outdoors. Running one of these vents is complicated and may be expensive. Its best left to a professional.

In contrast, a power-vented type relies on a fan to blow the exhaust gases out. Since this method doesnt rely on the natural buoyancy of hot air, the vent pipes dont have to go upward. They can go out horizontally, which usually makes them much easier to install. Further, the fan dilutes the exhaust with cooler air so you can run the vents with easy-to-assemble PVC pipe. Power venting is an especially good solution for more energy efficient, tightly built homes, where a good natural draft is difficult to establish.

However, you should be aware of several drawbacks:

If you decide to install one yourself, read the instructions carefully and make sure to follow all venting procedures. And call your local building department and ask if you need a plumbing permit to do the work.

Have the necessary tools for this DIY project lined up before you startyoull save time and frustration.

Avoid last-minute shopping trips by having all your materials ready ahead of time. Heres a list.

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How to Install a Power-Vented Water Heater | Family Handyman