Whats the real cost | Tankless Pros Water Heaters | Phoenix Az

Whats the Real Cost

THE REAL COST OF A TANKLESS UPGRADE

By Sidney Baysinger (Updated 08/16/2026)

For a quality gas tankless water heater in a typical 2-bath Phoenix-area home, most homeowners invest between $4,000 and $5,500 installed. A 3-bath home usually falls in the $5,000 to $6,500+ range when we can use the existing gas line.

Code or safety requirements sometimes call for a larger gas line. When that happens, the added cost is real — and we will tell you exactly what is needed before any work begins.

Quality Is Not Optional

Plenty of lower-priced tankless brands exist. Some of them work adequately for a few years. In our experience, many become unreliable and expensive to keep running. We do not sell them.

If you are going to switch to tankless, buy a brand that has proven itself over time. Paying a little more up front almost always costs less over the life of the unit.

Why We Recommend Navien

We install Navien, and Rinnai in selected applications) for clear reasons:

Dual stainless-steel heat exchangers that hold up far better in Arizona’s hard water
Virtually no “cold-water sandwich” during showers
Significantly lower maintenance than older non-condensing designs
15-year heat-exchanger warranty and a realistic 25+ year service life when maintained
Optional built-in recirculation and buffer tank that deliver near-instant hot water at every fixture

Condensing technology has been the standard for years now. The better manufacturers moved to it because it is more efficient (often 20–25 % better than the old non-condensing units) and more durable. Older online articles that still talk about non-condensing units as the norm are simply out of date.

Total Cost of Ownership Matters More Than Sticker Price

A properly sized and installed Navien typically pays for itself through energy savings in roughly 3–5 years, depending on your usage and utility rates. Over a 25-year life, most of our customers recover the original investment many times over.

The question is not “What is the cheapest unit I can buy today?” It is “What will this cost me to own for the next two decades?”

Why Tankless Pros

Plumbing has been our family trade since 1856. I started my own company in Arizona in 1979. For decades we have specialized almost exclusively in residential and commercial water heaters — tank and tankless, every major brand. That focus means we know, from thousands of installations and service calls, which units last and which ones create problems.

We only recommend the brands that have earned it in the Phoenix climate and under Arizona hard-water conditions. We size the unit correctly for your home, install it to code, and stand behind the work.

Next Step

Call us for a free, no-obligation in-home evaluation. You will receive a written quote with clear options so you can choose the right tankless system for your house, your family, and your budget.

Tankless Pros Water Heaters 602-833-1533