Venting Tankless Water Heater Into Furnace Exhaust

Tankless water heaters can be vented in two ways.

Venting tankless water heater into furnace exhaust.

A high e furnace has separate venting which leaves the existing vent pipe to serve only the water heater. The existing vent pipe is typically too large and must be replaced with one of a smaller dimension so the water heater can heat the vent enough to ensure exhaust gases rise out of the home. Tankless water heaters are vented in two ways. It would be a potential fire hazard.

Remove the anchoring screw from the base of the flue pipe. Tankless units withstand below freezing temperatures. Indoor tankless water heaters draw in outside air. Always follow the manufacturer s installation instructions exactly.

Outside tankless water heaters free up indoor space. Select either an adapter of three inch or an adapter of four inches depending on what water heater model you decide. Typically they require stainless steel triple wall venting. Installing your tankless water heater for easier venting to make venting easiest install your tankless water heater on an outside wall.

Tankless water heater venting features. Direct vent and power vent. All emission of liquid or gas water heaters which are tankless needs vent pipes made of stainless steel and approved by ul. Facts about tankless water heater venting.

They are there for a reason and they supersede building code. If the unit is installed on a basement wall the vent pipe can be run up just a few feet and then vented out the side with the use of a 90 degree elbow. Gas tankless water heaters don t have to use indoor air for combustion. Tankless heaters put out a lot of heat.

You furnace vent pipe is probably type b vent and not suitable for this use. Vent adapter is needed to connect the water heater which is tankless to the exhaust hose. Tankless water heaters don t always need two ventilation pipes even for direct vent units.