The vent pipe must be made of stainless steel designed for venting corrosive gases.
Can tankless water heater and furnace share vent.
The difference is that a power vent water heater pulls in combustion air from the space around the appliance then uses a fan to propel the exhaust through the vent.
Vent to the outside.
A high e furnace has separate venting which leaves the existing vent pipe to serve only the water heater.
Your tankless requires it s own individual vent.
This unit is a condensing unit and requires a pvc vent so no you can t connect it to the common vent you describe.
Before you decide against a tankless water heater for your next project consider these tankless water heater venting requirements.
Here are a few things your installer should consider for effective tankless water heater venting.
You furnace vent pipe is probably type b vent and not suitable for this use.
Facts about tankless water heater venting.
Tankless water heaters can vent through the roof or a side wall creating more flexibility and options for placement.
The furnace is likely sized correctly with no room to add another appliance.
It would be a potential fire hazard.
Yes venting tankless water heater with furnace is possible.
A direct vent system pulls in.
The furnace in the photos is a category i appliance a negative pressure draft vent appliance.
Tankless heaters put out a lot of heat.
Most homes have a shared vent serving both the furnace water heater when the furnace efficiency is up to 80 which is today s standard efficiency gas furnace.
Traditional gas tank water heater require venting through the roof.
Worst case scenario you kill your family.
Special stainless steel pipe.
If you were to tie the vents together the exhaust from the tankless water heater would be pushed through the furnace and into your indoor space.
Tankless water heaters can be vented in two ways.
Always follow the manufacturer s installation instructions exactly.
The tankless heater cannot share vent piping with any other appliance and it cannot use a masonry chimney flue for venting.
Tankless water heater venting must be done correctly to ensure safe and efficient operation of the unit.
Typically they require stainless steel triple wall venting.
This is because most homes have water heaters and furnace sharing the same exhaust vent.
Gas tankless water heaters don t have to use indoor air for combustion.
However the key here is to install the vent pipe in the size required by the water heater.
