Tankless Water Heater Venting Requirements

If you have issues with where to place a tankless water heater due to venting concerns then your best bet may be to get an electric tankless water heater.

Tankless water heater venting requirements.

Tankless units withstand below freezing temperatures. You do have way more options with electric than with gas or propane but the issue generally is the gpm. The tankless heater cannot share vent piping with any other appliance and it cannot use a masonry chimney flue for venting. Vent adapter is needed to connect the water heater which is tankless to the exhaust hose.

The water heater must be vented in accordance with the section venting of equipment of the latest edition of the national fuel gas code. Tankless water heater vent clearances if the unit is vented to the outside then it needs 12 inches of clearance from a door or window. Select either an adapter of three inch or an adapter of four inches depending on what water heater model you decide. Special stainless steel pipe.

The attached installation instructions from the manufacturer of these water heaters require a minimum vertical rise in the water heater exhaust flue as well as a proper ul listed chimney cap or termination for safe venting of combustion products. Outside tankless water heaters free up indoor space. American tankless water heaters venting. Tankless water heaters don t always need two ventilation pipes even for direct vent units.

Direct vent and power vent. Tankless water heater venting features. Any new tankless is going to require a special type of venting whether it be pvc or a proprietary brand. The biggest issue i see with tankless water heaters is contractors using the existing 3 4 gas line.

Here are a few things your installer should consider for effective tankless water heater venting. Tankless water heaters should not be installed near dryer vents or intake air vents. Indoor tankless water heaters draw in outside air. See the use and care manual for important information regarding the venting installation and materials for your tankless water heater.

Facts about tankless water heater venting. Tankless water heaters can be vented in two ways. There are grave liabilities and risks involved in violating basic mechanical and safety standards. If the window does not open the tankless water heater clearance from a window requires a 12 inch setback.

The high efficiency 90 or higher furnace will also require pvc venting. Gas tankless water heaters don t have to use indoor air for combustion. Tankless water heaters are vented in two ways. Vent to the outside.

No they don t need to be vented.