A water heater attached to a purple wall.

Noritz NRC661-DV-NG Indoor Tankless Hot Water Heater Review

If you’re considering a Noritz NRC661-DV-NG Indoor Tankless Water Heater for your home, this guide is for you. We’ll cover power, design, durability, installation, and more.

Overview
Noritz NRC66DVNG Indoor Condensing Direct Tankless Hot Water Heater, 6.6 GPM - Natural Gas
Title
Noritz NRC66DVNG Indoor Condensing Direct Tankless Hot Water Heater, 6.6 GPM - Natural Gas
Price
$882.00
Rating
Overview
Noritz NRC66DVNG Indoor Condensing Direct Tankless Hot Water Heater, 6.6 GPM - Natural Gas
Title
Noritz NRC66DVNG Indoor Condensing Direct Tankless Hot Water Heater, 6.6 GPM - Natural Gas
Price
$882.00
Rating

What Are The Benefits Of The Noritz NRC661-DV-NNG Indoor Tankless Water Heater?

Noritz has been an industry favorite for over 60 years. They introduced the first modern, electronically controlled tankless water heater in 1981 and have been innovating in the industry ever since. They provide high-quality, technologically advanced water heaters for you and your family. They are also known for providing more budget-friendly heater options, which can be a great thing if you are on a budget.

The Noritz NRC661-DV-NNG Indoor Tankless Water Heater is a fully condensing tankless water heater. It features an advanced heat exchanger as well as a built-in controller. It also features a fairly high water flow rate of up to 6.5 gallons per minute and it can be vented using 3″ Schedule 40/80 PVC, PP, or CPVC. You will need a sort of venting system in order to get this product up and running.

It comes with a direct vent kit made up of PVC pipe, and you will be able to hook the venting to it and you should be alright. It also comes with isolation valves. It can be installed on a gas line as short as a half-inch. However, the IK-WV-200-1-XX-LF valve kit, which is required in order to complete the installation process, is sold separately, so you should keep that in mind if you decide to purchase this product.

The Noritz Indoor Tankless water heater has a 0.2-gallon holding capacity and weighs thirty-eight pounds. It is made from stainless steel. It requires both the use of gas, either propane or natural gas, as well as the use of electricity for its electric ignition element. It also has basic temperature controls, but you can also purchase a remote control with a digital display separately if you find it necessary. A non-direct conversion kit is also available if you would like to mount the tank on a non-exterior wall.

It is rated 4.3 out of 5 stars on Amazon from a total of 76 reviews. It is also ranked number 174 in the water heater section of their website. It can be shipped not only within the United States but to select countries abroad as well. This gas tankless water heater is also Energy Star certified.

It is ideal for homeowners of small homes. It is both an indoor and an outdoor tankless model. Now onto the review. There are several upsides to purchasing the Noritz NRC661-DV-NNG Indoor Tankless Water Heater. Here are some of them, taken from tankless water heater reviews.

Power

Noritz NRC66DVNG Indoor Condensing Direct Tankless Hot Water Heater

This Noritz tankless water heater is considered average when it comes to its water heating capability. It is still more powerful than a traditional water heater and an electric tankless water heater, but it is considered mid-range in the market. This water heater will consume fifty-four watts of electricity, but if you turn on this product’s anti-frost mode, then the electricity consumption will go up to one hundred and thirty-eight.

The anti-frost mode, as the name suggests, is used to protect your water heater in case you live in an especially cold climate and perhaps have placed your heater in the garage. You will not need this feature if you live in a warmer or a more temperate climate or if you do not plan on installing it on the outside for your home (or as mentioned, the garage).

You are also able to rig the water heater’s battery backup so you can use it if the power in your home is out. This product has an energy factor of 0.9. The energy factor is based on the amount of hot water produced per unit of fuel consumed over a typical day. The higher the energy factor, the more efficient the water heater. This means that this product has a fairly high energy factor and that it is a very efficient model.

You can use either liquid propane or natural gas, as it is ninety-three percent efficient using either of the types of gas. It is also a low NOx water heater, meaning that it is a better choice for the environment as well as for your finances. Although this tankless water heater also features low nitrogen oxide emission, it also does not meet the standards required by the industry.

Nitrogen oxide can be very toxic and can cause damage to the human respiratory tract and increase a person’s vulnerability to, and the severity of, respiratory infections and asthma. Long-term exposure to high levels of nitrogen dioxide can cause chronic lung disease. So it is indeed a plus to be able to get a product with low levels of nitrogen oxide, yet the fact that this water heater is not certified by the industry can be a dealbreaker to some people.

Overview
Noritz NRC66DVNG Indoor Condensing Direct Tankless Hot Water Heater, 6.6 GPM - Natural Gas
Title
Noritz NRC66DVNG Indoor Condensing Direct Tankless Hot Water Heater, 6.6 GPM - Natural Gas
Price
$882.00
Rating
Overview
Noritz NRC66DVNG Indoor Condensing Direct Tankless Hot Water Heater, 6.6 GPM - Natural Gas
Title
Noritz NRC66DVNG Indoor Condensing Direct Tankless Hot Water Heater, 6.6 GPM - Natural Gas
Price
$882.00
Rating

Design

The design of this product is done exceptionally well. This tankless water heater was designed to be a compact product, saving you space in your bathroom or your storage room. Inside the water heater, there are two heat exchangers that are made out of commercial-grade copper. The manufacturer claims that the kind of copper used in this model is 25 percent thicker than the type of copper typically used in a gas-powered tankless water heater.

The gas consumption rate on this water heater goes from fifteen thousand up to one hundred and twenty thousand BTUs per hour. A BTU is the quantity of heat needed to raise one pound of water by one degree Fahrenheit. More BTUs mean more heating power. This relates directly to the product’s water flow rate. It means that at a minimum, this water heater will provide you hot water at a flow rate of 0.5 GPM (gallons per minute), and at a maximum, it will provide you hot water at a flow rate of 6.6 GPM.

It can get to the maximum flow rate when it is increasing water by only 30 more degrees. When it needs to deliver water at a 70-degree increase, the water flow rate will drop by half. While this tankless water heater has a very impressive flow rate, it does only have the ability to serve either two faucets or two showerheads at once. So if you have a large home, or have many people living in your home, then you might need to watch out to make sure this is the right product for you.

At the same time, during the winter, if you live in a cold climate, this product will only really be able to serve one showerhead with hot water at once. Ideally, this is a kind of tankless water heater that would work best for a small family and a small household. The temperature range on this water heater can go from one hundred degrees to one hundred and forty degrees Fahrenheit. You will be able to choose a few temperatures for your heater at the time of purchase. You can also purchase a remote separately that will let you choose from nine different temperature settings.

 

Durability

On par with the industry’s average, the manufacturer claims that this tankless water heater can last you for up to 20 years. Although, with the proper maintenance and care you might be able to make this product last for longer. It is all about knowing how to properly care for this type of heater in order to make it last. You will also have a manufacturer’s warranty for the first twelve years of ownership.

There are also several things that the manufacturer has added to the product that improve its durability. Noritz has added a temperature control lock, condensate overfill detector, fan rotation detector, freeze protection, lightning protection device, overheating protection device, and a flame sensor. All of these should help make your product last longer.

Installation

A water heater being installed by a professional.

Tankless water heater installation can be complicated so it’s a good idea to hire a professional to do it.

The installation process with this product can get a little tricky if you lack the proper plumbing experience. This is why we recommend you get a professional that can help you through the process or do it for you; however, we do have to complement the instructions manual since it does do an impeccable job of explaining the installation process.

Overview
Noritz NRC66DVNG Indoor Condensing Direct Tankless Hot Water Heater, 6.6 GPM - Natural Gas
Title
Noritz NRC66DVNG Indoor Condensing Direct Tankless Hot Water Heater, 6.6 GPM - Natural Gas
Price
$882.00
Rating
Overview
Noritz NRC66DVNG Indoor Condensing Direct Tankless Hot Water Heater, 6.6 GPM - Natural Gas
Title
Noritz NRC66DVNG Indoor Condensing Direct Tankless Hot Water Heater, 6.6 GPM - Natural Gas
Price
$882.00
Rating

What Is A Tankless Hot Water Heater?

Tankless water heaters work, as the name suggests, without the need for a storage tank to keep your water warm. Instead, tankless water heaters work on demand to heat up your water as it passes through the mechanism inside your pipes. This means that you get hot water on demand straight from your faucet, and there is no need to wait for a storage tank to fill up, or to find space for it in your bathroom or storage space. Here are some of the benefits of a tankless water heater system:

  • Tankless Water Heaters Are Energy Saving
  • Tankless Water Heaters Last Longer
  • Tankless Water Heaters Are Space-Saving
  • Tankless Water Heater Provide You With Endless Hot Water

There are a few downsides to a tankless system. It can lower your water flow rate, making it so that the water coming out of your faucet will be slower, and therefore give you less water at once. They also often last 20 years, while conventional storage water heaters sometimes last you up to 25. However, with proper maintenance, the best tankless water heaters might be able to last you almost as long as storage tank water heaters. In case you want to look at other options, are some other types of water heater systems:

  • The Conventional Storage Water Heater
  • The Heat Pump Water Heater or Hybrid Water Heater
  • Solar Powered Water Heater
  • Condensing Water Heater

Some of the other types of water heaters can be better for the environment (such as the solar-powered water heater), or cheaper (such as the conventional storage water heater, as mentioned above) but none of them have quite the ability to heat water with the energy-saving abilities and the budget-friendly elements like how tankless water heaters can.

Tankless water heaters use less power as there’s no tank that has to keep gallons of water hot at all times.

How Do Tankless Hot Water Heaters Work And How Do I Pick One?

Tankless water heaters work by heating up your water while it travels through the machine. In order to do this, they use either a gas burner or an electric element. You might prefer a gas burner since it will give you a higher flow rate, or a heating element, which is less expensive and more environmentally friendly. That is up to you. When purchasing a tankless water heater, you might also want to consider the size of the tankless water heater, meaning how many fixtures can it cover and how many can it cover at the same time, since some are less powerful than regular storage-tank water heaters and if you own a large house, you might need to consider getting more than one of these products in order to cover all of the fixtures you need.

It is also recommended that you get a tankless water heater with an anti-scale device, which is a sort of water softener device. This will save you a ton of money on maintenance and save you time on the maintenance process itself. It will also extend the lifespan of your device, which is a great plus. Another thing you should consider is the energy-saving abilities since different models will have different capabilities.

And finally, you should consider the water flow rate of the product and make sure that it matches the one you need. You can use this list to see what the flow rate (as well as the temperature) is that you would need in your home depending on how many of these you do and how many you would do simultaneously:

Shower:

Average Flow GPM: 2.5 to 3.0 GPM
Average Temperature: 104°F

Kitchen Sink:

Average Flow GPM: 1.5 GPM
Average Temperature: 110°F

Bathtub:

Average Flow GPM: 4.0 GPM
Average Temperature: 102°F

Washing Machine:

Average Flow GPM: 2.0 GPM
Average Temperature: 120°F

Dishwasher:

Average Flow GPM: 1.5 GPM
Average Temperature: 110°F

Overview
Noritz NRC66DVNG Indoor Condensing Direct Tankless Hot Water Heater, 6.6 GPM - Natural Gas
Title
Noritz NRC66DVNG Indoor Condensing Direct Tankless Hot Water Heater, 6.6 GPM - Natural Gas
Price
$882.00
Rating
Overview
Noritz NRC66DVNG Indoor Condensing Direct Tankless Hot Water Heater, 6.6 GPM - Natural Gas
Title
Noritz NRC66DVNG Indoor Condensing Direct Tankless Hot Water Heater, 6.6 GPM - Natural Gas
Price
$882.00
Rating
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Joshua Perkins

Joshua spent ten years as a water systems technician in California before settling down with his wife and two young children in Nashville in 2018. Through all of his experience, he learned the benefits and shortfalls of so many different types of water filtration systems, from pitchers to whole-house installations. He started Water Filter Authority in 2019 to empower other families to make the right decision for their long-term health and wellness.