Colton Deck

By: Colton Deck on November 23rd, 2022

Print/Save as PDF

How Much Does a Navien Tankless Water Heater Cost?

Tankless Water Heaters

Shopping around for a tankless water heater can be tricky, especially if you’re looking for one from a reputable brand. Many tankless water heater companies aren’t quite what you’d call upfront about how much their products cost. But we’re here to clear up that confusion! 

After installing countless tankless water heaters in the Los Angeles area for over 15 years, we’ve got a solid grasp of what a tankless water heater will cost you. More specifically, we have all the information you need on what a Navien tankless water heater costs. 

We’ll break down what you can expect to see on your bill when purchasing a Navien tankless water heater and cover some of the factors that can add to your total investment. You’ll soon be able to build a realistic expectation of the costs associated with a Navien tankless water heater. 

How Much Does a Navien Tankless Water Heater Cost?

It’s hard to nail down an exact price for Navien tankless water heaters since the company offers a range of models. But if you look at the various residential models on offer, you can expect your bill to reflect between $1,200-$2,300 for the unit itself. 

A couple of things determine which model is right for you. Home size, demand, and the number of bathrooms in your home all play a role in determining the cost of your Noritz tankless water heater. If you’re unsure of where your home stands, then takings these 3 steps to determine which size of tankless water heater is right for you will be an invaluable asset in prepping for installation.

So, now you’ve got a pretty good idea of where the cost of a Navien tankless water heater will land, but there are several other considerations to factor in that can increase your total investment. 

Download the Navien Brand Guide Now


Factors that Impact Cost

A tankless water heater is useless on its own. This means you’ll have to navigate the installation process to get a return on your investment. But it isn’t just installation that can increase the cost of a Navien tankless water heater. 

Factors that impact cost are:

  • Installation
  • Venting
  • Water lines
  • Gas lines

Here are a couple of things to keep in mind before going all-in on a Navien tankless water heater. 



There’s no getting around installation costs for any major home upgrade. 

Sure, the top-end cost of a Navien tankless water heater is around $2,300, but installation costs can easily inflate your investment closer to between $4,700-$8,300. You might think this is a pretty big range, and you’re right, but this includes installers with different installation tiers. 

Some companies provide basic and premium installation packages. While you’ll get the standard water connections, gas connections, new isolation valves, and the unit, premium installations can bake in more long-term value. 

Premium installations often add in items like an expansion tank, a neutralizer, and water treatment to keep your tankless water heater running at its peak. 

Looking past the initial installation cost, a few things can stack up during the installation process. 



On the low end, adjustments to your home's existing venting or completely replacing it can cost about $395. Venting can get pricy depending on the situation, though. 

Basically, the more venting, the more expensive the installation. For instance, a foot of venting is going to be cheaper than five feet of venting. So, if your home requires more venting, you can expect an additional cost here. 

Additionally, your water heater’s location plays a role here. And in other cases, some factors can necessitate a specific type of venting that differs from a standard installation. These are just a couple of examples of what you might run into.

Some homes don’t require as much as others, but it’s always best to play it safe when budgeting a project. 


Water Lines

Depending on the state of your water lines, a technician may need to replace them to get your tankless water heater installed safely. But if you choose to relocate your water heater, you’ll certainly be seeing some additions to your final bill since you’ll need some new water lines. 

To run new lines or fix up older ones, you could be looking at an additional $395 to $995. What may start as a somewhat modest investment can quickly work its way up to feeling like a weightier cost. This is another factor you’ll want to consider while heading into the installation process. 


Gas Lines

From the outset of the installation process, you might think your gas lines are up to snuff. But the reality of the situation is that many homes have gas lines that are incompatible with tankless water heaters. 

Many homes feature ½-inch gas lines, but tankless water heaters often require ¾-inch gas lines. If this is the case with your home, then they’ll need to be swapped out, which will hand you a price bump. 

Even if your gas lines fit correctly, their condition is also important. If your lines aren’t in good enough shape, you’ll need to have them replaced to ensure the safety of your household. 

Replacing gas lines is one of the costlier pitfalls you may face. On the high end, you’re looking at around $3,900 to have them replaced. 


Ready to Install a Navien Tankless Water Heater?

After touching base on how much a Navien tankless water heater costs, we ran through other factors that can increase your total investment. Now, you’ve got a clear understanding of not just the cost of your Navien tankless water heater but also what to expect heading into the installation process. With this information, you can better budget for installation or assess whether a Navien tankless water heater is right for you. 

After 15 years of installing tankless water heaters, we can tell you that Navien is one of the best tankless water heater companies around. There are other top-tier brands out there, but a Navien tankless water heater can hold its own with the best of them. Despite its standing within the market, you’ll still want to think about those other cost factors we talked about before diving in head first. 

We can swear by a brand all day, but it won’t make a difference unless you feel comfortable with your decision. It’s best to consider whether a tankless water heater is right for you. If you’re not sold on Navien, then it’s worth comparing brands like Noritz vs. Rheem to get a better idea of what’s on the market. 

Our Navien Tankless Water Heater Guide can also get you up to speed on all things Navien and help you get to know Navien through the eyes of our certified technicians. 

If you’re ready to take the next step, give us a call at (310) 853- 8690 or visit us online at our tankless water heaters page to book a consultation.