Direct Vent Water Heater Venting Requirements

This difference in operation means that you can install a direct vent system almost anywhere.

Direct vent water heater venting requirements.

To test for proper water heater venting. All water heater venting systems use a vent duct or pipe also called a chimney or flue to bring exhaust gases from the water heater to the outdoors. If water heater and a gas furnace share the same vent reduce the thermostat setting for the furnace so it does not run during the test. Allow water heater to run continuously for 10 minutes.

Such a drain pan must be not greater than 11. Such a drain pan must have a minimum length and width of at least 2 inches 5 1 cm greater that the water heater dimensions and must be piped to an adequate drain. Water heater ducts may lead directly outdoors or they may tie into a larger vent duct that also serves a gas or propane furnace or boiler in the home. A direct vent system pulls in air from outside and then vents the exhaust through a horizontal pipe.

The duct may be metal or plastic depending on the type of vent system. Drain pan depth must allow for access to the outer doors for servicing the pilot and burner. Inches deep have a minimum length and width of at least 2 inches greater than the water heater dimensions and must be piped to an adequate drain. Illustrations of proper gas fired water heater venting using type b double wall vent pipe through a roof above or through a chimney below include details for the flue vent connector such as the requirement of a minimum vent connector upwards slope of 1 4 per foot of horizontal run.

Run enough hot water for the water heater start heating. Your water heater needs to exhaust flue gases safely and it must also draw fresh air indin. We ll cover each venting type individually as well as requirements and some potential water heater venting problems that you may find.