Table of Contents
Tankless water heaters can vent through the roof or a side wall, creating more flexibility and options for placement. Traditional gas tank water heater require venting through the roof. Tankless water heaters use fans to blow exhaust from the unit horizontally, allowing vents to terminate on the side of a house.
Can you use PVC to vent a tankless water heater?
The Rinnai Sensei tankless water heater offers 14 possible venting configurations and can use PVC, chlorinated polyvinyl chloride (CPVC), or polypropylene venting. They tolerate higher temperatures up to 194 degrees and 230 degrees Fahrenheit, respectively, and can be used with condensing tankless units.
What is the code for venting a tankless water heater?
The water heater must be vented in accordance with the section “Venting of Equipment” of the latest edition of the National Fuel Gas Code: ANSI Z223. 1/NFPA 54 in the United States and/or Section 7 of the CAN/CSA B149.
Can you use existing vent for tankless water heater?
For the same reason you can’t vent a tankless water heater with a furnace, you won’t be able to use the existing vent pipe from an old gas tank water heater. The existing vent for tankless water heaters is not compatible because most are galvanized vent piping and will rust quickly.
Do all tankless water heaters require venting?
No. Unlike gas tankless water heaters and gas traditional tank style water heaters, electric tankless water heaters do not require any venting. This is often one of the deciding factors when choosing whether you should purchase a gas or electric tankless water heater.
Can you vent a gas water heater through the wall?
The air that is used for combustion will come from the water vent, this vent will either through the roof or from the outside of the wall. This means that only one single pipe is required to go through the roof or wall where the clean air is moved and the off-gasses will be vented.
Can you put a power vent on a regular water heater?
Natural gas or propane hot water heaters are generally less expensive to operate than electric heaters, but installing a standard vent in a house without an existing chimney is expensive. It’s easier to run the vent if you install a “power-vented” type of natural gas (or propane) water heater.
How far can you vent a direct vent water heater?
Minimum clearances between the water heater and combustible and noncombustible construction are: 0 inches from sides, 0 inches from back, 4 inches from front of jacket to closet door and 3 inches from top of jacket to combustible and noncombustible ceiling. Minimum vent clearance: 0 inches.
Do tankless water heaters need dedicated gas line?
Tankless water heaters provide hot water on-demand. Gas units require a gas line, adequate combustion air, a vent to remove combustion gas and an electrical outlet to power the unit. While they last longer than tank-style water heaters, they are more costly to install and often require upgrading your gas line.
Are sediment traps required for tankless water heaters?
In other words, sediments traps are required at furnaces, boilers, water heaters, clothes dryers, ovens, space heaters, unit heaters, gas fireplaces, and more.
Can you vent a tankless water heater in the attic?
Simply put, as long as there is enough combustion air provided, tankless water heaters can be installed in any area of your home, from a utility room to a garage to, yes, even an old, dusty attic.
Do tankless water heaters need fresh air intake?
1. Gas tankless water heaters don’t have to use indoor air for combustion. Tankless water heaters can be vented in two ways: power-vent or direct-vent. Power-vent units use indoor air for combustion and simply vent the exhaust to the outside.
How high does a water heater vent need to be?
For a single-wall pipe, you need 6″ clearance, and you cannot pass it through a ceiling, floor, or wall unless it’s masonry or concrete (non-combustible). For the draft hood connection, you need to allow for at least 12″ of vertical vent before throwing an elbow fitting in the line.
Can you put a gas tankless water heater in a closet?
Your tankless water heater can be installed just about anywhere! Due to the small size of your water heater, it can be mounted in many small spaces, including closets, under sinks, in pantries, or under stair storage areas.
Can you vent water heater and furnace together?
Vent connectors serving equipment vented by Natural draft (typical water heater) Shall Not Be Connected Into Any Portion of Mechanical-draft systems (80% and higher efficiency gas furnaces). This Means: With Any New Furnace Installation — A Gas Water Heater Must Then Be Separately Vented.
Can you vent a gas hot water heater out the side of the house?
Power-vented natural gas water heaters use an electric fan or blower to push or pull combustion gases to the outdoors. This type of venting allows gas water heaters to be installed as far as 40 feet away from an outside wall and in homes without existing vertical vents.
Is a power vent water heater worth it?
Power vent water heaters are more energy efficient, so they require less gas to operate. The lower energy consumption will save you some money, but probably not more than $20 a year, making this an added benefit, but not a deciding factor. A power vent water heater can be a good option for this situation.
Does a power vent water heater need a dedicated circuit?
A gas water heater usually needs no electricity. Some have powered vents, the ones that do use less than 100 watts (less than one amp). So a dedicated circuit is not needed.
