Can You Vent A Tankless Water Heater Into A Chimney

However it doesn t have to be an expensive hassle to vent.

Can you vent a tankless water heater into a chimney.

Be sure to check your gas water heater annually for cracks or leaks in the flue. With a condensing tankless water heater you don t need metal venting. Special stainless steel pipe. Chimney chimney flue must terminate min.

The reason is because like a standard water heater they create dangerous combustion gases when they fire. This is because most homes have water heaters and furnace sharing the same exhaust vent. Electric tankless water heaters do not need to be vented but gas tankless heaters do. The biggest issue is that the condensate is very acidic and will corrode the masonry of a chimney.

To avert this problem you can vent the water heater to the largest hole in the chimney and cap the remaining holes. The gases contain carbon monoxide. Vent to the outside. The tankless heater cannot share vent piping with any other appliance and it cannot use a masonry chimney flue for venting.

The standard galvanized vent from your old storage tank heater would quickly rust away if your tankless heater vented. Non condensing tankless water heaters typically transfer to the water only about 80 percent of the heat they generate. It really is not a good idea. 5 above the flue collar e g.

However the key here is to install the vent pipe in the size required by the water heater. The vent pipe must be made of stainless steel designed for venting corrosive gases. Yes venting tankless water heater with furnace is possible. Here s how to vent a water heater to a chimney.

I would like to replace my tank type water heater with a tankless rheem rtg 74pv in the same location. Water heater installed close to the roof framing would need at least 5 long vertical vent pipe single wall vent pipe requires minimum 6 of clearance to combustible materials general rule the chimney should not be outside a window or other house opening. I would like to vent it into the brick chimney were the heating boiler and the old water heater was vented to. The remaining heat creates a hot exhaust gas that requires metal venting typically stainless steel or thick aluminum.