Expert Tankless Water Heater Installation for Your Home

Why Homeowners Are Switching to Tankless

Traditional tank water heaters store and constantly reheat 40 to 80 gallons of water, whether you need it or not. That means you’re paying to keep water hot 24 hours a day — even when you’re asleep or at work. When that stored supply runs out mid-shower, you’re stuck waiting 30 to 60 minutes for it to recover.

A whole-home gas tankless water heater changes that equation entirely. It heats water on demand, only when you turn on a faucet. The result is continuous hot water that never runs out, in a unit that takes up a fraction of the space and lasts roughly twice as long.

What Tankless Installation Involves: Process, Permits, and Timeline

Every tankless water heater installation is unique, but the core process follows the same proven steps. Our vetted local plumbing partners handle everything from initial assessment to final testing.

For first-time conversions (replacing a tank with a tankless unit), the work typically includes removing the old tank heater, upgrading the gas line to support the higher BTU demand, installing new concentric PVC venting to the exterior, mounting the tankless unit, connecting water lines with isolation valves, and testing every hot water fixture in your home.

For tankless-to-tankless replacements, the infrastructure is already in place. The plumber disconnects the old unit, mounts the new one, reconnects gas, water, and venting, and tests the system. This is significantly faster and less expensive.

Tankless Water Heater Installation Cost: What Affects Your Quote

The cost of tankless water heater installation depends on several factors:

Current water heater type is the biggest cost driver. Converting from a tank to tankless costs $5,000 to $9,000 because it requires new gas lines, venting, and often electrical work. Replacing an existing tankless unit runs $3,000 to $5,500 since the infrastructure exists.

Home size and fixture count determine the unit size. Larger homes with more bathrooms need higher-GPM units, which cost $200 to $800 more.

Installation accessibility matters. A water heater in a garage or on an exterior wall is straightforward. Units in crawlspaces, attics, or tight interior closets add 10 to 15 percent to labor costs.

Gas availability is critical. If your home doesn’t have natural gas service, adding a gas line can cost $350 to $2,000 or more.

Tankless Water Heater Brands We Install: Rinnai, Navien, Noritz, Rheem

Our plumbing partners are certified to install and service every major tankless water heater brand:

• Rinnai — Industry leader known for exceptional reliability and long-term durability. The RU199iN is one of the most popular whole-home gas tankless units in the country.
• Navien — Best value with built-in recirculation pumps and ComfortFlow technology that eliminates the cold water sandwich effect. The NPE-240A is a top seller.
• Noritz — Japanese engineering with a focus on compact design. Ideal for tight installation spaces and homes where exterior wall mounting isn’t possible.
• Rheem — Strong warranty program and wide availability. The RTGH series delivers consistent performance at a competitive price point.
• Bosch — Compact point-of-use and whole-home options. Popular for supplemental tankless installations.
• AO Smith/Takagi — Reliable commercial-grade units that perform well in high-demand residential settings.

Rebates and Tax Credits

Energy-efficient tankless water heaters can qualify for significant savings. Federal tax credits of up to $2,000 may be available for qualifying Energy Star certified units. Many state and utility programs offer additional rebates. We help identify every available incentive during your free estimate — visit our rebates page for current information.

Where We Install Tankless Water Heaters

Total Tankless provides professional tankless water heater installation in Tampa, Orlando, Fort Lauderdale, Jacksonville, Houston, Austin, Denver, the Inland Empire, and San Jose. Every market is served by vetted, licensed local plumbing partners who specialize in tankless systems.

Wondering what your installation will actually cost? Our detailed cost breakdown guide walks through every factor that affects your quote.

Your Next Step

Getting started is simple. Request a free virtual estimate online — share a few photos of your current water heater setup and answer a few questions about your home. We’ll respond with an accurate cost range and connect you with a vetted local plumber when you’re ready for an on-site assessment.

No pressure, no obligation. When you’re ready to upgrade to endless hot water, Total Tankless is here.