Tankless Water Heater Vent Requirements

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.

Tankless water heater vent requirements.

Tankless water heaters use fans to blow exhaust from the unit horizontally allowing vents to terminate on the side of a house. Tankless water heaters can vent through the roof or a side wall creating more flexibility and options for placement. The tankless heater cannot share vent piping with any other appliance and it cannot use a masonry. Tankless water heater venting must be done correctly to ensure safe and efficient operation of the unit.

In almost all circumstances replacing an existing water heater will require either one or two permits. Tankless water heater venting style permits for multiple emission choices. Tankless water heaters can be vented in two ways. Here are a few things your installer should consider for effective tankless water heater venting.

This is as easy as heading down to the local planning or building department to ask for one. That is the biggest factor when selecting the location for the installation. Facts about tankless water heater venting. The type of tankless water heater will determine if you need a vent or not.

Electric tankless water heaters are very efficient since they don t require venting and don t lose their heat. For example an electric tankless heater that is rated at raising the water temperature 55 degrees at 1 5 gpm will supply you with a 120 degree temperature if the incoming water is 65 f or higher. Traditional gas tank water heater require venting through the roof. Tankless water heaters blow exhaust from the heater horizontally with the use of fans thereby permitting vents to end on a different position of your house.

Before you decide against a tankless water heater for your next project consider these tankless water heater venting requirements. The first permit is for the water heater itself. All of the energy needed to heat the water stays there with no loss. See the use and care manual for important information regarding the venting installation and materials for your tankless water heater.

Vent to the outside. Yes you want to be close to the source of your gas or water. Condensation tankless water heaters minimize the value of the installation. Do tankless water heaters need a vent.

Gas tankless water heaters don t have to use indoor air for combustion. As i mentioned when you go for an electric you have way more options available. A few rare cases may also require a third permit.