Tankless Water Heater Austin TX
Install, repair, or descale your tankless water heater. Austin's hard water requires annual maintenance — our technicians service all major brands and keep your unit running at full efficiency.
Tankless Water Heater Service in Austin, Texas
Tankless water heaters — also called on-demand or instantaneous water heaters — have become the preferred choice for Austin homeowners seeking unlimited hot water, longer equipment life, and reduced energy consumption. Unlike traditional tank units that heat and reheat 40-80 gallons continuously, tankless units heat water only when a tap is opened, eliminating standby losses.
The critical consideration for Austin tankless owners is hard water maintenance. Austin's Edwards Aquifer water carries 8-15 grains per gallon of dissolved minerals — primarily calcium and magnesium carbonate. These minerals precipitate as hard scale inside the heat exchanger when water is heated. Without annual descaling, scale builds up on the heat exchanger plates, progressively reducing flow rate and heat transfer efficiency until the unit fails or throws error codes.
We recommend and perform annual descaling service using food-grade citric acid or white vinegar flush through the heat exchanger, restoring full flow and efficiency. Many Austin homeowners also install a whole-home water softener upstream of the tankless unit to dramatically reduce scale formation — we can design and install a complete system that protects your investment.
Tankless Brands We Service
Tankless Water Heater Services
New Installation
We assess your home's hot water demand, size the unit correctly, upgrade the gas line if required, install to manufacturer specifications, and obtain the City of Austin permit. Typical installation takes 4-6 hours.
Annual Descaling
Vinegar or citric acid flush through the heat exchanger removes mineral scale deposits. Recommended annually in Austin due to hard water. Takes 1-2 hours. Restores full flow rate and heat transfer efficiency.
Error Code Diagnosis
We diagnose and repair all error codes for Rinnai, Navien, Bosch, and other brands — including ignition failures, overheating shutdowns, flow sensor issues, and heat exchanger blockages.
Conversion from Tank
Replacing a traditional tank heater with a tankless unit requires sizing the new unit, upgrading the gas line to match higher BTU demand, installing a new venting system, and adjusting water supply connections.
Tankless Water Heater Service
Installation from $1,500. Annual descaling from $150. All brands serviced.
(512) 943-7070Free installation estimate
All major brands stocked
Annual maintenance program
2-year labor warranty
Tankless Water Heater FAQs — Austin TX
Is a tankless water heater worth it in Austin TX?
Yes. Tankless units provide unlimited hot water, last 20+ years versus 10-12 for tanks, and eliminate standby heat loss. Austin's hard water requires annual descaling, but with proper maintenance, the long-term value is strong — particularly for larger families or homes with high hot water demand.
How often should I descale my tankless water heater in Austin?
Annually. Austin's hard Edwards Aquifer water (8-15 grains per gallon) rapidly scales the heat exchanger. Without annual descaling, efficiency drops and heat exchangers can fail within 5-7 years. Annual service costs $150-$250 and protects a $1,500-$3,000 investment.
How much does tankless water heater installation cost in Austin?
Whole-home gas tankless installation typically runs $1,500-$3,500 all-in including the unit, labor, gas line upgrade if needed, and permit. Popular models include Rinnai RUR98iN (best seller), Navien NPE-240S, and Bosch 940ES.
Why is my Rinnai or Navien throwing an error code?
Common error codes include scale buildup blocking the heat exchanger (code 14 on Rinnai, E012 on Navien), ignition failure from dirty igniter or gas pressure issues, and overheating from restricted flow. We diagnose the specific code and repair the root cause, not just clear the error.
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Get a Tankless Water Heater Installed in Austin TX
Free estimates on installation. Same-day service for repairs. All brands serviced.
(512) 943-7070