Tankless Water Heater Venting Requirements

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.

Tankless water heater venting requirements.

No they don t need to be vented. Here are a few things your installer should consider for effective tankless water heater venting. There are grave liabilities and risks involved in violating basic mechanical and safety standards. Direct vent and power vent.

The attached installation instructions from the manufacturer of these water heaters require a minimum vertical rise in the water heater exhaust flue as well as a proper ul listed chimney cap or termination for safe venting of combustion products. Facts about 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. 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 high efficiency 90 or higher furnace will also require pvc venting. Any new tankless is going to require a special type of venting whether it be pvc or a proprietary brand. You do have way more options with electric than with gas or propane but the issue generally is the gpm. Gas tankless water heaters don t have to use indoor air for combustion.

Tankless water heater vent clearances if the unit is vented to the outside then it needs 12 inches of clearance from a door or window. Special stainless steel pipe. Tankless units withstand below freezing temperatures. The water heater must be vented in accordance with the section venting of equipment of the latest edition of the national fuel gas code.

Tankless water heaters should not be installed near dryer vents or intake air vents. Vent adapter is needed to connect the water heater which is tankless to the exhaust hose. If the window does not open the tankless water heater clearance from a window requires a 12 inch setback. Tankless water heaters can be vented in two ways.

American tankless water heaters venting. Tankless water heater venting features. Vent to the outside. Indoor tankless water heaters draw in outside air.

Outside tankless water heaters free up indoor space. 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. Tankless water heaters are vented in two ways.

Select either an adapter of three inch or an adapter of four inches depending on what water heater model you decide.