Can You Vent A Tankless Water Heater Into A Chimney

The remaining heat creates a hot exhaust gas that requires metal venting typically stainless steel or thick aluminum.

Can you vent a tankless water heater into a chimney.

The reason is because like a standard water heater they create dangerous combustion gases when they fire. Technically you can vent your tankless heater through the chimney but only in certain circumstances. I would like to replace my tank type water heater with a tankless rheem rtg 74pv in the same location. However the key here is to install the vent pipe in the size required by the water heater.

Non condensing tankless water heaters typically transfer to the water only about 80 percent of the heat they generate. 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. Most building codes require 4 inch flue pipes on water heaters.

To avert this problem you can vent the water heater to the largest hole in the chimney and cap the remaining holes. Special stainless steel pipe. The standard galvanized vent from your old storage tank heater would quickly rust away if your tankless heater vented. The gases contain carbon monoxide.

The vent pipe must be made of stainless steel designed for venting corrosive gases. With a condensing tankless water heater you don t need metal venting. Be sure to check your gas water heater annually for cracks or leaks in the flue. Vent to the outside.

Here s how to vent a water heater to a chimney. Yes venting tankless water heater with furnace is possible. 5 above the flue collar e g. Here are a few things your installer should consider for effective tankless water heater venting.

The tankless heater cannot share vent piping with any other appliance and it cannot use a masonry chimney flue for venting. Chimney chimney flue must terminate min. I would like to vent it into the brick chimney were the heating boiler and the old water heater was vented to. The biggest issue is that the condensate is very acidic and will corrode the masonry of a chimney.