Tankless Gas Water Heater Venting

A tankless water heater requires a 4 foot clearance from the side or below a door or window that opens unless the unit is directly vented to the outside.

Tankless gas water heater venting.

Non condensing tankless water heaters typically transfer to the water only about 80 percent of the heat they generate. Select either an adapter of three inch or an adapter of four inches depending on what water heater model you decide. The reason is because like a standard water heater they create dangerous combustion gases when they fire. Every gas powered tankless water heater that is installed inside the house requires a venting system while an electric type does not.

Vent adapter is needed to connect the water heater which is tankless to the exhaust hose. The gases contain carbon monoxide. All emission of liquid or gas water heaters which are tankless needs vent pipes made of stainless steel and approved by ul. Atmospheric heaters vent exhaust via an upward or vertically sloping metallic duct vent to exit your house.

These water heaters are the most popular residential gas models. See the use and care manual for important information regarding the venting installation and materials for your tankless water heater. If you wish to learn more visit our blog at https livingasustaina. Every gas powered unit is burning natural gas or propane to produce heat.

In this video i show how i installed a gas vent for our propane tankless water heater. Tankless water heaters can vent through the roof or a side wall creating more flexibility and options for placement. Electric tankless water heaters do not need to be vented but gas tankless heaters do. However it doesn t have to be an expensive hassle to vent.

Tankless water heaters use fans to blow exhaust from the unit horizontally allowing vents to terminate on the side of a house. All indoor tankless gas water heaters must be vented vertically or horizontally to the outdoors using factory approved venting material no other venting material is permitted. This includes traditional tank type gas heaters also. It doesn t matter if the gas is natural gas or propane this fact remains the same.

You can either dedicate this venting to your water heater or share it with other atmospheric vent devices like a furnace. With a condensing tankless water heater you don t need metal venting. Traditional gas tank water heater require venting through the roof. If you have a gas fueled tankless water heater that is installed inside the house it needs to be vented to the outside.