Can tankless water heater use existing vent?

No common venting.

The tankless heater cannot share vent piping with any other appliance, and it cannot use a masonry chimney flue for venting.

Does a tankless water heater need exhaust?

Tankless hot water heaters require special venting to blow hot exhaust gas outside, where it dissipates. Unlike traditional tank-style water heaters, gas tankless hot water heaters offer far more versatile venting options.

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.

Can you use PVC to vent a tankless water heater?

In most cases, PVC makes a great venting material. It’s the least expensive option and is easy to install. And it’s a good reason to consider a high-efficiency condensing unit.

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.

Can furnace and tankless water heater share vent?

In short, yes.

Can you vent a tankless water heater in the attic?

Because direct-vent units use outdoor air, they can be placed in smaller spaces, such as an attic, closet, or small mechanical room. 2. Tankless water heaters don’t always need two ventilation pipes, even for direct-vent units.

Is it normal to smell gas from a tankless water heater?

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. Of course, a gas leak is hazardous, so it isn’t something you should overlook.

Can tankless water heater be installed in 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 vent gas water heater through wall?

Direct. With direct vent installations, there is a sealed combustion chamber and a flue pipe. They can vent separately or together through a double-wall pipe. Compared to atmospheric, direct-vent water heaters offer more installation flexibility because they can vent horizontally.

What size gas line is needed for a tankless water heater?


A typical tankless water heater will need a ¾-inch gas line. However, if there is sufficient pressure and the run length is short enough, a ½-inch line may be sufficient with certain tankless water heaters, such as the Noritz EZ Series.

How long does a Rinnai tankless water heater last?

up to 20 years

The life expectancy (or useful lifespan) of a Rinnai tankless water heater is up to 20 years. Actual life is impacted by water quality, usage and proper maintenance. For comparison, a tankless water heater lasts about twice as long as a tank water heater, making them a better value in the long run.

How often should you flush your tankless water heater?

once a year

Over time, a tankless water heater may accumulate mineral build up which can erode the walls inside your tank’s heating chamber. To properly maintain and clean your tankless water heater, it’s important to flush those mineral deposits at least once a year.

Where is Rinnai made?

It will be commemorated in the lobby of the Rinnai America Manufacturing facility in Griffin, Georgia.

Can I unplug my tankless water heater?

You can turn the power off to the unit by flipping the breaker to which it is wired. If you are using a gas-powered tankless water heater, then you’ll need to shut off the gas to it. There should be a lever that allows you to turn off the gas to the unit. Some models may require you to turn off the main gas value.

What happens if you unplug water heater?

Any time you go on vacation, it’s best to also turn off your water heater as well. Turning off the source of the heat (gas, electric) while you’re away will not damage your water heater. This will save you in power (gas) and potential damage if it leaks too.

Can tankless water heaters run on propane?

Tankless water heaters can run on propane (LP gas). Propane tankless water heaters provide instant hot water on demand, just like natural gas models. Propane can be used where natural gas utilities are not available.

Will a tankless water heater work without electricity?

So, will a tankless gas water heater work without electricity? No, a tankless gas water heater still requires some electricity to operate. Tankless gas water heaters have an internal PC board, electronic ignition, and an electronic thermostat that requires electricity to operate.

Do tankless water heaters have battery backup?

Tankless water heaters use very little electricity and can thus be safely run with a common battery backup designed for computers and electronics.

Do tankless water heaters have a pilot light?

Gas tankless water heaters use a pilot assembly and burners to create heat, which is then transferred to water as it flows through the unit on its way to your tap. When your tankless water heater fails to produce hot water, its burners do not ignite when you open your hot water tap to start the flow of water.