Gas Hot Water Heater Venting Requirements

Sediment trap many locations require a sediment trap to be installed as close to the gas inlet as possible.

Gas hot water heater venting requirements.

Gas water heater vent configurations. Standard atmospheric water heaters are the most common type of residential gas water heaters. This heater installation may be unsafe. Allow water heater to run continuously for 10 minutes.

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. It cannot be connected to an existing vent pipe or chim ney. These vents must be made of suitable materials and be kept clear of combustible materials. Run enough hot water for the water heater start heating.

This heater installation may be unsafe. It must be terminated to the outdoors. The power vent water heater requires its own separate venting system. In addition to venting gas and propane water heaters need an air supply for combustion.

The natural gas fueled water heater shown at page top is improperly vented lacking the recommended minimum 12 of vertical rise before the elbow and vented directly into a large masonry flue where it cannot develop adequate draft. For this reason common venting configurations are no longer allowed in some code jurisdictions where direct venting or power venting of water heaters is now mandatory. The natural gas fueled water heater shown at page top is improperly vented lacking the recommended minimum 12 of vertical rise before the elbow and vented directly into a large masonry flue where it cannot develop adequate draft. To test for proper water heater venting.

This difference in operation means that you can install a direct vent system almost anywhere but a power vented water heater must be placed in a room with adequate airflow.