Licensed & Insured
5-Star Rated
Same-Day Available
All Brands Serviced
Tankless Water Heater Services
Tankless Heater Pros is Knoxville’s only tankless‑only company — specializing exclusively in the installation, repair, replacement, and maintenance of tankless water heaters. Our manufacturer‑trained technicians service all major brands including Navien, Noritz, Rinnai, Rheem, and more. Whether you’re experiencing an issue, planning an upgrade, or maintaining your system, we provide expert tankless solutions built for long-term performance.
Why Choose Tankless-Only Specialists?
Tankless water heaters operate differently from traditional tank systems. They require precise gas supply, venting, flow rates, and brand‑specific components. Working with tankless‑only specialists ensures your system is installed, diagnosed, and serviced according to manufacturer standards — protecting your investment and improving long-term reliability.
- Manufacturer-trained technicians
- Brand-specific diagnostic expertise
- Correct installation for maximum efficiency
- Accurate troubleshooting and repair
- Maintenance that protects system lifespan
Certified Brand Expertise
We service, install, and maintain all major tankless water heater brands:
- Navien
- Noritz
- Rinnai
- Rheem / Paloma
- Bosch
- EcoSmart / Electric Units
Each brand has unique components, error codes, and service requirements. Our technicians understand these differences and follow manufacturer guidelines to ensure safe, efficient operation.
Our Tankless Water Heater Services
Explore our full range of tankless water heater services. Each category links to a dedicated page with detailed information, processes, and brand-specific insights.
Fast diagnostics and expert fixes for ignition issues, flow problems, temperature fluctuations, error codes, and component failures.
Professional installation designed for efficiency, correct sizing, proper venting, and long-term performance.
Upgrade aging or inefficient systems with modern tankless technology built for reliability and energy savings.
Routine descaling, cleaning, inspections, and performance checks to extend system lifespan and maintain peak operation.
Benefits of Tankless Water Heating
- Endless hot water on demand
- Up to 40% energy savings vs. tank heaters
- Longer lifespan — often 20–25+ years
- Space-saving wall-mounted design
- Reduced risk of flooding compared to tank systems
Serving Knoxville & Surrounding Communities
We proudly serve homeowners throughout Knox County and the surrounding East Tennessee region, including:
- Knoxville
- Farragut
- Hardin Valley
- Karns
- Powell
- Oak Ridge
- Lenoir City
- Maryville
Call (865) 407-1147 to confirm service in your area.
Need Tankless Water Heater Service?
Whether you need repair, installation, replacement, or maintenance, our tankless-only specialists are ready to help.
