Tankless water heater cost with installation

Looking for tankless water heater cost with installation in Knoxville, TN? Call WaterHeater Services 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

Need help right now? If you are dealing with a leaking tank or no hot water, do not wait for the situation to get worse. Water damage happens fast, and we are here to help you get a professional on the line immediately. Stop the stress and call us now; your request is routed to a qualified technician in seconds. Licensed, independent service providers serve your area — call now for a contact a provider. (978) 759-4817

What affects the price

When you are shopping for a new water heater, the final cost depends on a few moving parts. First, consider the fuel source—switching from electric to gas or vice versa involves more labor. The capacity you need, measured in gallons, also changes the price tag, as does the physical footprint of the unit in your home. If your current plumbing or venting needs updates to meet modern safety codes, that adds to the work involved. We help you sort through these variables, with exact pricing confirmed free on the call.

Frequently asked in Knoxville

How long do hot water heaters typically last?

Most traditional tank water heaters last about 10-15 years. Factors like water quality and maintenance play a big role. If yours is nearing that age and showing signs of trouble, it might be time to consider a replacement. A pro can assess its condition and give you the best advice for your Knoxville home.

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 because they heat water on demand, meaning they don't waste energy keeping a large tank of water hot. Heat pump water heaters are also very efficient. Discussing your hot water needs with a Knoxville pro will help determine the best fit.

What are signs I need a new water heater?

Look for signs like rusty water, leaks around the base of the tank, or a lack of hot water. Strange noises, like popping or rumbling, can also indicate internal issues. A pro can tell you if repair or replacement is best.

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

The most common issues often involve the heating element or thermostat failing. Sediment buildup in the tank can also reduce efficiency and cause noise. Leaks are another frequent problem, especially as the unit ages. Regular maintenance can often prevent these common issues.

Is it worth it to repair a hot water heater?

Repairing a water heater is often worth it if the problem is minor and the unit is relatively new. However, if you're facing major repairs on an older unit, the cost might be better put towards a new, more efficient model. A pro can provide a professional 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, South Knoxville, North Knoxville, Fountain City, Old City — and every surrounding area.