Tankless water heater cost — Knoxville, TN

Looking for tankless water heater cost in Knoxville, TN? Call WaterHeater Experts for a contact a provider — no obligation. Licensed plumbers serve Knoxville and the surrounding area, and you'll get straight answers on timing and what affects the price.

Last updated: September 24, 2026

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What affects the price

When you are looking at the price of a new water heater, a few main things shift the final number. The type of unit you choose—whether it is a tank model or a tankless system—is the biggest factor. You also have to consider the fuel source, like gas or electric, and the physical space where the heater sits. If your home needs new venting, updated piping, or a different hookup to meet current safety codes, that adds labor time to the project.

About this service

The price of the tankless water heater itself depends on the unit's output capacity and features like Wi-Fi connectivity or built-in recirculation pumps. Beyond the unit price, you must account for the labor required to install it safely. We guide you through selecting the right model based on your home size and demand. Exact pricing confirmed free on the call.

Even though it is warm outside, your water heater is still working daily. Summer is a great time to adjust your settings, as the incoming water isn't as cold, which can actually help extend the life of your unit. If you are planning a home renovation or just want to upgrade to a more efficient model, call us to talk through your options.

Frequently asked in Knoxville

How long do hot water heaters typically last?

What is the average cost of putting in a water heater?

What is the most efficient type of water heater?

Tankless water heaters are generally considered the most efficient type available. They only heat water on demand, meaning you're not constantly using energy to keep a large tank of water hot. This can lead to significant energy savings for your household in Knoxville. Gas tankless models are typically more powerful and efficient than electric ones.

What are signs I need a new water heater?

Several signs indicate it's time for a new water heater in your Knoxville home. These include a significant drop in hot water supply, unusual noises like banging or popping, visible rust or leaks around the tank, or discolored water. If you notice any of these issues, it's wise to have a licensed pro inspect your unit.

What is the most common problem with a hot water heater?

Is it worth it to repair a water heater?

Whether it's worth repairing a water heater depends on the problem and the age of the unit. Minor repairs on a relatively new heater are often cost-effective. However, if your water heater is old or has a major issue, replacing it might be more economical in the long run. A licensed pro can give you an honest assessment.

Also serving nearby: Asheville · Chattanooga · Murfreesboro · Roswell · Sandy Springs

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More on this: DOE water heating — efficiency and sizing.

Service area details

198,162residents

2,007per sq mile

8ZIP codes served

Serving all of Knoxville — population 198,162; about 2,007 residents per square mile across 98.7 sq mi. ZIP codes covered include 37901, 37902, 37909, 37912, 37914, 37915, 37916, 37917.

Neighborhoods served in Knoxville: Downtown Knoxville, West Knoxville, North Knoxville, South Knoxville, Old City, Bearden — and every surrounding area.