Tankless Water Heater Installation

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License – 13980506-5501
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Gold Best of Southern Utah 2026 · Plumber
Licensed & insured · License 13980506-5501
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Tankless water heater installation in St. George, UT gives homeowners and business owners a reliable way to produce hot water on demand, without storing 40 or 50 gallons in a tank that runs 24 hours a day. In a region where summer temperatures regularly exceed 110°F and energy bills climb fast, switching to a tankless system is one of the smartest upgrades you can make.

Element Plumbing, Heating & Air has installed tankless water heaters across St. George and Southern Utah for years. Our team handles every part of the job, plumbing, gas lines, electrical, and venting, so you don't need to coordinate multiple contractors. Voted Best of Southern Utah 2025, we bring an education-first approach to every project. That means clear explanations, multiple options, and zero pressure.

Schedule Service (435) 554-1330Available 24 hours a day

Custom water treatment system with tankless heater in St. George, UT

Tankless Water Heater Services Offered in St. George, UT

Element provides a full range of tankless water heater services for residential and commercial properties. Here's what we offer and how each service works.

Tankless Water Heater Installation Services
Element installs tankless water heaters from leading manufacturers including Rinnai, Navien, and Noritz. Our process starts with a load calculation, we measure how many fixtures your home needs to run simultaneously, factor in St. George's incoming water temperature, and recommend the right unit size.
Installation includes mounting the unit, connecting water supply and return lines, running gas or electrical connections, and installing code-compliant venting. Most installations take a single day. Every job is inspected to meet local building codes and manufacturer specifications.
Tankless Water Heater Replacement and Upgrades
If your current tankless unit is losing efficiency, throwing error codes, or nearing the end of its 15- to 20-year lifespan, Element can replace it with a newer, higher-capacity model. We evaluate your existing setup to determine if your gas line, venting, and electrical connections can support an upgraded unit, or if modifications are needed.
Upgrades often make sense when your household's hot water demand has increased, such as after adding a bathroom or installing a soaking tub. We'll size the replacement to match your actual usage.
On-Demand Water Heater Installation for New Construction and Remodels
New builds and remodels are the ideal time to install a tankless water heater. Without existing plumbing constraints, we can place the unit in the most efficient location, run dedicated gas lines, and design the venting path for maximum performance.
Element works directly with general contractors and homeowners during the construction phase. We coordinate with electricians and framers to ensure the rough-in is done right the first time. This avoids costly rework after walls are closed.
Convert Your Traditional Tank Water Heater to a Tankless System in St. George
Converting from a 40- or 50-gallon tank to a tankless system is one of the most common services we perform. The process involves removing the old tank, rerouting water lines, upgrading gas piping if needed, and installing new venting (tank-style water heaters and tankless units use different vent types).
St. George's hard water is a factor we always address during conversions. Mineral buildup can reduce a tankless unit's efficiency over time. Element installs isolation valves on every unit so future descaling flushes are quick and easy. If your home doesn't already have a water softener, we'll recommend one, hard water and tankless heaters don't mix well long-term.

Why St. George Homeowners Choose Element for Tankless Water Heater Installation

Element isn't a franchise. We're a local company founded by Jon and Jaimie, a tradesman and a chemist, who built this business on doing things differently.

In-house expertise across trades.
Most plumbing companies subcontract gas and electrical work. Element handles plumbing, gas lines, electrical connections, and venting with our own licensed technicians. That means one company, one point of contact, and no scheduling headaches.
Education-first approach.
We explain what you need, why you need it, and what it costs before any work starts. We present multiple options at different price points. You choose what works for your home and budget. Our technicians don't earn commissions, so there's no incentive to push a more expensive unit.
Hard water knowledge.
Southern Utah's water is some of the hardest in the country. Jaimie's background in chemistry shapes how we approach water-related installations. Every tankless water heater we install includes isolation valves for easy maintenance, and we advise on water treatment solutions that protect your investment.
Voted Best of Southern Utah 2025.
That recognition came from our neighbors, the same people we serve every day across St. George, Washington, Ivins, and Santa Clara.
24/7 availability.
Hot water emergencies don't wait for business hours. Neither do we.

Element technician installing a water heater and softener in St. George, UT

24/7Available 24 hours a day

Element technician working on a water heater in St. George, UT

Some of Our Recent Reviews

Water heater and water softener installed in a garage in St. George, UT

Frequently Asked Questions About Tankless Water Heater Installation in St. George

Why do some plumbers discourage tankless water heaters?

Some plumbers lack experience with the gas line upgrades, dedicated venting, and electrical work tankless units require. At Element, our technicians handle plumbing, gas, and electrical in-house, so we install tankless systems correctly and to code every time.

How long does a tankless water heater last in Southern Utah?

A properly maintained tankless water heater lasts 15 to 20 years. St. George's hard water can shorten that lifespan if the unit isn't flushed regularly. Element offers maintenance plans that include descaling to protect your investment.

What size tankless water heater do I need for my St. George home?

Sizing depends on how many fixtures you plan to run at once and the incoming water temperature. In St. George, groundwater temperatures average around 60–65°F in winter, which affects the unit's output. Element's technicians perform a load calculation to recommend the right size for your household.

Can I convert my existing tank water heater to a tankless system?

Yes. Element handles full tank-to-tankless conversions, including gas line modifications, new venting, electrical upgrades, and permit coordination. Most conversions are completed in a single day.