Your Tankless Water Heater Installation questions, answered
Answers to commonly asked questions from the experts on HomeGuide.
How much does tankless water heater installation cost?
Tankless water heater installation costs$800 to $3,500 on average, depending on the brand, fuel source, flow rate, and labor rates. Tankless hot water heater prices are $300 to $2,100 for a gas or electric on-demand system, plus $300 to $2,500 for installation labor.
Do tankless water heaters save money?
Tankless water heaters save $40 to $200 per year on energy costs and are 8% to 34% more energy-efficient than traditional water heaters.
How long do tankless water heaters last?
Tankless water heaters last 10 to 20 years on average. In comparison, traditional tank water heaters last 8 to 15 years on average.
Are tankless water heaters worth it?
A tankless water heater is worth it for homeowners who want an endless hot water supply and increased home value. Tankless water heaters are more energy-efficient and save $40 to $200 per year on energy costs, but cost more to install. Most homeowners see a total return on their investment after 20 years.
How long does it take to install a tankless water heater?
Tankless water heater installation takes 3 to 10 hours for a new install or 2 to 4 hours to replace an existing tankless unit. New tankless water heater installs require upgraded gas supply lines, new venting, and a new electrical outlet.
Who installs tankless water heaters near me?
Plumbing companies install gas and electric tankless water heaters. Home Depot and Lowe's also offer tankless water heater installation through their network of licensed plumbers.
What is a tankless water heater?
A tankless water heater provides hot water on demand, heating water only when needed rather than continuously using fuel to heat water in a storage tank. When a hot water tap is turned on, cold water travels through the heat exchanger in the tankless unit and is warmed instantly.
Whole-house tankless systems deliver hot water to all the fixtures and appliances throughout the home.
Point-of-use tankless models are smaller units designed to provide hot water to a single fixture or appliance.
Where to install a tankless water heater?
Plumbers can install tankless water heaters on inside or outside walls, including utility rooms, attics, garages, or basements. Tankless water heaters can also be installed in place of an old tank water heater if the area provides enough combustion air. Tankless units installed outside can freeze and needs protection from the weather, direct sunlight, rain, and bugs.
How do I know if I need a new water heater?
Signs a water heater is going out:
Rusty, discolored, or metallic-tasting water
Loud clanging, knocking, gurgling, or whining noises
Hot water that runs out quickly
Low water pressure
Foul odor coming from hot water
Low or irregular water temperature, or no hot water at all
Leaks at the base of the tank or around the pipes at the top of the tank
Will a tankless water heater work without electricity?
A tankless water heater does not work without electricity. Natural gas and propane tankless water heaters need electricity to operate the internal PC board, ignition, and thermostat.
Is a gas or electric tankless water heater better?
Gas tankless water heaters have many advantages over electric on-demand systems.
Gas tankless systems are:
More energy-efficient and saves $150 to $300 in annual operating costs
Warranty lasts up to 5 years longer
Provides a higher gallons-per-minute (GPM)
Most gas units are eligible for a $300 federal tax credit
Electric tankless water heaters are:
Cheaper to install
Easier to repair
How to find tankless water heater plumbers near me?
Finding reputable contractors requires planning, researching, and asking questions. To hire the best:
Get at least three estimates from plumbers to compare.
Look for plumbers with experience installing tankless water heaters.
Select companies that are licensed, insured, and bonded.
Check out their reviews and previous work on HomeGuide and Google.
Make sure the quote includes removal of the old water heater.
Ask about their guarantees.
Get an itemized estimate, contract, and warranty in writing before the work begins.
Avoid making payments upfront. Pay after installation is completed.
What questions should I ask tankless water heater installers?
When looking to hire a plumber near you, ask them the following questions:
Which type of water heater do you have the most experience installing?
What flow rate and temperature rise should my tankless water heater be able to handle?
Would a gas, propane, or electric tankless water heater be best for my home, and why?
Which tankless water heater brands do you offer, and why do you recommend those brands?
Are there any manufacturer rebates available?
Does your estimate include removing and disposing of the old water heater? If not, how much extra will that cost?
What additional costs should I expect?
What permits do I need, and will you obtain them?
How long will the installation take?
How long is the warranty, and what does it cover?
How long will the water heater last, and what can I do to make it last longer?
What kind of maintenance will my new tankless water heater require?
What payment methods do you accept?
What do I need to provide to get started?
Reviews for Austin tankless water heater installation companies
Recent success stories from people in the Austin area.
Elena G.
Quick Shout-Out to My Compadre Oz, the Master Plumber
“¡Órale! When Oz rolled up to fix my pipes, it felt like family showing up—steady hands, big heart, job done right.”
On-the-Dot Arrival & Setup: Dude hit my driveway exactly when he said, tools lined up like soldiers, and walked me through the game plan so I never wondered what was next.
Eye for the Tiny Stuff: He leveled every line, tightened each joint twice, and left zero drips—like he’s got a sixth sense for leaks.
Treats Your Casa Like His Own: Boot covers on, drop cloths down, and he even swept the floor before he bounced. That’s puro respeto, amigo.
Fixes Surprises Without the Drama: When a hidden crack popped up, Oz laid out clear options, fair prices, and patched it faster than you can say “más salsa.” If you want master-level skill wrapped in South Texas hospitality, Oz is the only name you need to dial.
Oz The Plumber
Phat L.
My water heater was broken due to recent winter storm and need to be replaced with a new one. He did such a good job installing it. Very patient and know what he is doing. The price is right and reasonable. Do not overcharge for many extras like other plumbers. Quick service. Overall very happy with his service and would recommend him for anyone who looking for a good but affordable plumber.
Good Guy plumbing and Services
Joffre J.
Excellent, speedy service!
Aaron Remodeling & Cleaning Services LLC
Robert A.
Eri and his helper came to my house to check out what I needed for the job, went to Home Depot with me to get the stuff that we needed for the job and came back to my home and did the Job!! This was all done on a Sunday! Very reasonable, personable and highly recommended.
PRO HOME SERVICE
Eddie J.
when the tech came to look at the dryer right away, he had identified what the problem was and right away took care of the problem.
A1AA Repair
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