Tankless Water Heater Installation in Dallas, TX | 5Star Plumbing New Construction

Tankless Water Heater Installation

Navien and top-tier tankless systems sized, permitted, and installed for endless hot water and lower utility bills.

Navien tankless water heater installed with copper gas and water lines in a Dallas mechanical room

Overview

Running out of hot water halfway through a shower is a problem builders and homeowners shouldn't have to plan around. Our licensed technicians design and install high-efficiency tankless water heater systems — including Navien and other top-tier manufacturers — sized correctly for the fixture count and simultaneous-use demand of your project.

Every installation includes proper gas line sizing, dedicated venting, condensate management, copper supply and return piping, and a full manifold layout that keeps future service simple. We pull permits, coordinate inspections, and leave the mechanical room labeled and photographed for your records.

What's Included

Endless hot water — no more waiting on tank recovery
Up to 30-40% lower water-heating energy costs vs. tank units
Compact wall-mounted footprint frees up utility space
Manufacturer-certified installation keeps warranties valid
Recirculation and smart-control options available

Our Process

How We Handle Every Tankless Water Heater Installation Project

Free On-Site Estimate

We walk the job, review plans or existing systems, and provide clear, written pricing before any work begins.

Permit & Plan Review

We pull required permits and confirm layout against code and your project's stamped drawings.

Professional Installation

Licensed technicians install to spec with pressure-tested, photographed, and labeled work.

Inspection & Walkthrough

We coordinate inspections and walk you through the finished system before we call the job done.

FAQ

Tankless Water Heater Installation — Frequently Asked Questions

What size tankless unit does my home or project need?

Sizing depends on your peak simultaneous fixture demand (showers, dishwasher, laundry, etc.) and your incoming groundwater temperature. We calculate the required gallons-per-minute rating on site and recommend the right unit rather than a one-size-fits-all box.

Do you handle the gas line and venting upgrades?

Yes. Tankless units often need a larger gas line and dedicated venting than a traditional tank. We size, run, and permit both as part of the installation so the unit performs at full capacity.

Can you install a tankless system in new construction before drywall?

Absolutely — this is our specialty. We rough-in gas, water, and venting during the framing stage and return to set and commission the unit once the mechanical room is ready.

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