Tankless Water Heater Vent Requirements

Tankless units withstand below freezing temperatures.

Tankless water heater vent requirements.

Tankless water heaters are vented in two ways. All emission of liquid or gas water heaters which are tankless needs vent pipes made of stainless steel and approved by ul. 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. These vents must be made of suitable materials and be kept clear of combustible materials.

Vent adapter is needed to connect the water heater which is tankless to the exhaust hose. These vents must be made of suitable materials and be kept clear of combustible materials. Tankless water heaters can be vented in two ways. Ansi z223 1 nfpa 54 in the united states and or section 7 of the can csa b149 1 natural gas and propane installation code in canada as well as applicable local building codes.

The tankless heater cannot share vent piping with any other appliance and it cannot use a masonry chimney flue for venting. American tankless water heaters venting. Tankless does not mean instant hot water contrary to popular thought a tankless water heater does not necessarily deliver hot water to your tap any faster than a conventional water heater. Special stainless steel pipe.

Tankless water heater venting features. Facts about tankless water heater venting. Proper venting gas and propane heaters emit carbon monoxide which must be vented outside. In fact a tankless unit may be slower.

It takes time for the tankless unit s heating element to first heat water before delivering it to the tap. Tankless water heaters don t always need two ventilation pipes even for direct vent units. No they don t need to be vented. Indoor tankless water heaters draw in outside air.

Direct vent and power vent. Outside tankless water heaters free up indoor space. The vent pipe must be made of stainless steel designed for venting corrosive gases. The water heater must be vented in accordance with the section venting of equipment of the latest edition of the national fuel gas code.

Select either an adapter of three inch or an adapter of four inches depending on what water heater model you decide. If you have issues with where to place a tankless water heater due to venting concerns then your best bet may be to get an electric tankless water heater. You do have way more options with electric than with gas or propane but the issue generally is the gpm. Restrictions on gas fueled tankless water heaters no gas appliance may be located in a room used.

Gas tankless water heaters don t have to use indoor air for combustion.