Table of Contents
Can I 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.
Does a tankless gas water heater need a vent?
Installing a tankless water heater outside frees up indoor space and requires no additional venting. 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 I use PVC for tankless water heater vent?
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 vent gas water heater through 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 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.
Is it normal to smell gas from a tankless water heater?
Tankless gas water heaters are not designed to release gases even when they are operating. If you smell gas from a tankless water heater, it means there is a leak somewhere, which you need to get fixed out immediately. A tankless water heater will give out gas-only when there is a gas leak or incomplete combustion.
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 vent a tankless water heater into a chimney?
The tankless heater cannot share vent piping with any other appliance, and it cannot use a masonry chimney flue for venting. Special stainless steel pipe. The standard galvanized vent from your old storage tank heater would quickly rust away if your tankless heater vented through it.
Is a tankless water heater worth the cost?
Energy Use and Efficiency Tankless: Gas and electric tankless water heaters run more efficiently than the conventional water heaters of the same fuel type. We rated the annual energy consumption cost Excellent for a gas model but only Fair for an electric, but both rate Very Good for energy efficiency.
Can you vent a gas 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.
What size B vent do I need?
To determine the proper vent size for a single-appliance vent, use Table 1 or 2 (pages 12-14). Determine Total Height (H) and Total Lateral Length (L) based on location of appliance and vent and the height to vent termination. Read down the Total Height (H) column at the left to a height equal to the Total Height.
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.
What is the difference between direct vent and power 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. A direct vent system pulls in air from outside and then vents the exhaust through a horizontal pipe.
Can an indoor tankless water heater be installed outside?
A tankless water heater can be installed outside if it’s designed to withstand harsh weather patterns. There are specific models designed for indoor and outdoor usage, so you have to choose the correct type.
Can a gas tankless water heater be installed in the attic?
Because of their compact size, many tankless water heaters can be installed in a garage, attic, basement or utility closet without sacrificing floor space.
Can you install a tankless water heater anywhere?
Tankless water heaters can be installed anywhere inside your home. You can even have a tankless water heater in a bathroom! Some families with larger homes choose to install two, one for each floor, for example. Because of their small size, they fit in closets, cabinets, pantries or laundry rooms.
