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.
What type of vent does a tankless water heater use?
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. Direct-vent units pull in air from the outside, so they have two vents for intake and exhaust.
Many homes are built with the water heater and furnace sharing the same exhaust vent. This practice is common with standard efficiency (80%) furnaces. When installed correctly, this venting arrangement works with an 80% gas furnace (or less than 80%) + gas water heater.
Can I use old power vent on new water heater?
Then you have a new heater with an old vent motor. You cannot use a regular – non vent motor – water heater with the vent motor or the exhaust piping. You would have to properly vent the standard heater. It will have a much higher exhaust temp.
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.
Does a tankless electric water heater need a vent?
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 I vent hot water heater through wall?
Direct Vent Water Boiler
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.
What is the downside of a tankless water heater?
The main disadvantage of tankless water heaters is their upfront cost (unit and installation) is significantly higher than tank-style heaters. Including installation, tankless water heaters cost 3 times more than tank-style water heaters on average.they cannot provide hot water during a power outage.
Can you vent two water heaters together?
exit vent would be fine. Thanks! Double the size of a single vent. Two exhausts flues, one from each tank, at 3 inches for each tank, equals 6 inches when combined.
Can a water heater be vented out a sidewall?
There are three types of venting and only a power vent is allowed to terminate at a sidewall. venting system (vent piping) and chimney by natural means. flame retention burners). a structure to the outside atmosphere in lieu of a chimney.
Can you put a power vent on any hot water heater?
This difference in operation means that you can install a direct vent system almost anywhere, but a power vented water heater must be placed in a room with adequate airflow.
Why have a power vent water heater?
The main benefit of a power vent water heater is the ability to locate the water heater away from a chimney. If there is no chimney available, horizontally venting the water heater to the outside through inexpensive venting pipe instead will also benefit the homeowner by saving money.
Can you reuse a power vent on any water heater?
No. You cannot use a regular vented gas water heater in place of a power-vent water heater with PVC exhaust system. The gas valve/thermostat is not designed on the regular models to accept any changes. It depends on why the power vent unit was installed in the first place.
Does a tankless water heater have to be on an outside wall?
It is possible to install a tankless water heater outside and free up indoor space. The roof or side wall can be used as a vent for the tankless water heaters. Venting through the roof is required for traditional gas tank water heaters.
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 install a tankless water heater yourself?
Installation. While it is possible to install your own tankless water heater, it’s not a job for inexperienced do-it-yourselfers. There are a number of different sizes and styles of tankless water heaters, including propane, natural gas and electric, along with single-room or whole-house sized models.
How far can you vent a power vent water heater?
This water heater is a power vented appliance and is designed to intake and exhaust the products of combustion through 3 (7.6 cm) or 4 (10.2 cm) diameter vent pipe to the outdoors.
What are the electrical requirements for a tankless water heater?
Most tankless gas water heaters require a 15 ampere or 20-ampere 120-volt circuit to power the electric pilot light and the control board. The National Electrical Code requires instantaneous water heaters to have circuits not exceeding 120 amperes and protected at not more than 150 amperes.
What is the proper way to vent a gas water heater?
The venting must be vertical or upward sloping so that the hot exhaust rises up through the venting to exit your home. Making sure that your home has a properly working vent system is imperative when installing a standard atmospheric vent with your water heater.
Can you vent a hot water tank out the side of a house?
Water heaters with power venting come with an electric blower fan (often very quiet) installed on top of the water heater and can have either vertical or horizontal vent ducts. Since the vent does not rely on the buoyancy of hot air, it can be run horizontally to the outside of the house.
Why is tankless water heater installation so expensive?
Installation is expensive because the unit needs a bigger gas supply than a conventional water heater does, and it needs to run its own exhaust flue to the exterior. Installation costs can vary widely, depending on the location of the flue and the gas supply. The unit itself costs between $800 and $1,000.
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