Gas tankless water heaters deliver the highest flow rates available and are the most common choice for Southern California homes with existing natural gas service. When sized correctly and installed with proper gas line capacity and venting, a gas tankless system provides unlimited hot water on demand and eliminates the standby energy loss of a traditional tank. At Wise Choice Remodeling (CSLB #1104186), we handle the complete installation including gas line assessment, any required upgrades, and proper venting so your system performs as designed from day one.
Signs Your Home Is Ready for a Gas Tankless Upgrade
Gas tankless installation makes sense in a wide range of situations. Here are the most common:
- Running out of hot water regularly with your current tank heater
- Tank heater is over 10 years old and becoming less efficient
- High monthly gas bills from standby heat loss in a tank system
- Planning a home addition or ADU that needs additional hot water capacity
- Replacing a failed tank heater and want a long-term upgrade
- Limited storage space where a wall-mounted tankless unit frees floor space
Gas tankless is particularly well-suited for Southern California homes with multiple bathrooms, large families, or high simultaneous hot water demand.
Gas Tankless Installation Services We Provide
We handle the full scope of gas tankless water heater installation.
Single Unit Whole-Home Installation
A single properly sized gas tankless unit can supply the entire hot water demand of most Southern California homes. We size the unit based on your peak flow rate demand and incoming water temperature.
Multi-Unit Installation
Larger homes with high simultaneous hot water demand may benefit from two tankless units installed in parallel. We assess your home’s peak demand and recommend the most efficient configuration.
Gas Line Upgrade
Gas tankless units require more BTU capacity than tank heaters and often require a larger gas supply line. We assess your existing gas line and upgrade it as part of the installation when required.
Venting Installation
Gas tankless units require proper exhaust venting to the exterior. We install direct vent or power vent systems based on the unit’s requirements and your home’s configuration.
Gas Tankless vs. Electric Tankless vs. Tank
Understanding how gas tankless compares to alternatives helps confirm it is the right choice for your home.
| Factor | Gas Tankless | Electric Tankless | Traditional Tank |
|---|---|---|---|
| Flow Rate | High — handles multiple simultaneous uses | Lower — best for point-of-use | Fixed tank volume |
| Energy Efficiency | Excellent — no standby loss | Excellent — no standby loss | Lower — continuous reheating |
| Fuel Required | Natural gas or propane | Electricity | Gas or electric |
| Installation Complexity | Moderate — gas line and venting | Lower — no venting | Low |
| Lifespan | 20+ years | 20+ years | 8-12 years |
Our Gas Tankless Water Heater Installation Process
Assessment and Sizing
We assess your household peak hot water demand, existing gas line capacity, and venting options to select the correctly sized unit.
Unit Selection and Estimate
We present unit options with a detailed written estimate covering equipment, installation, gas line work, and venting. No vague line items, no surprise charges.
Gas Line Assessment and Upgrade
We assess the existing gas supply line and upgrade it to the size required for your new unit if needed.
Unit Installation and Venting
Our crew removes the old water heater, installs the new tankless unit, and sets up proper venting to the exterior.
Testing and Commissioning
We run the system through a full test, verify flow rate and temperature at multiple fixtures, and confirm everything is operating correctly before we leave.
Get a Free Gas Tankless Water Heater Installation Estimate
Ready to upgrade to endless hot water and lower energy bills? Contact Wise Choice Remodeling to schedule your free assessment and estimate. We will evaluate your home’s hot water demand, gas line capacity, and venting options and give you a clear written quote.
How Long Does Gas Tankless Installation Take?
Most gas tankless water heater installations are completed in one day. Installations requiring significant gas line work may take longer. We give you a clear timeline during the estimate phase.
Gas Tankless Installation Cost — What to Expect
Costs vary based on the unit selected, gas line upgrade requirements, venting configuration, and whether the old unit requires removal and disposal. A straightforward replacement of an existing tankless unit is less expensive than a full new installation requiring gas line work and new venting.
We provide detailed written estimates at no charge based on your specific home and installation requirements.
Are There Rebates for Gas Tankless Water Heaters?
Yes. Many gas tankless water heater installations qualify for utility rebates from SoCalGas and other providers, as well as federal energy efficiency tax credits. Eligibility depends on the specific unit installed and current program availability. We advise on applicable programs during your estimate.
Why Choose Wise Choice for Gas Tankless Water Heater Installation
Licensed and Insured
We carry full general liability and workers compensation coverage.
Correct Sizing Every Time
An undersized unit will not meet your peak hot water demand. We size every installation to your actual household flow rate requirements.
Gas Line Expertise
We assess and upgrade gas supply lines as part of the installation process. A unit connected to an undersized gas line will not perform to its rated capacity.
Workmanship Guarantee
We stand behind every installation. If something is not right after we leave, we come back and fix it.
No Unknown Subcontractors
Your installation is handled by our experienced, licensed crew from start to finish.
Gas Tankless Water Heater Installation Services Across Southern California
Wise Choice Remodeling provides professional gas tankless water heater installation services to homeowners across Southern California. We serve Los Angeles County, Riverside County, San Bernardino County, Orange County, San Diego County, and the Palm Desert area. Our licensed crew delivers the same level of care and quality on every job regardless of location.
Gas Tankless Water Heater Installation
Questions Answered
Sizing depends on your peak simultaneous hot water demand measured in gallons per minute and your incoming water temperature. We calculate the correct size based on your household's actual usage patterns during our assessment.
Many older homes have gas supply lines sized for traditional tank heaters that cannot supply the BTU demand of a tankless unit. We assess your existing gas line during our estimate and advise on whether an upgrade is needed.
Gas tankless units require access to a gas line and must be vented to the exterior. They can be installed indoors or outdoors depending on the unit type and your home's configuration. We advise on the best location during the assessment.
Yes. Gas tankless units should be flushed annually to prevent mineral scale buildup, particularly in Southern California's hard water areas. We advise on maintenance requirements during installation.
Most gas tankless water heaters require electricity to operate the control board and ignition system. They will not function during a power outage unless a backup power source is available.
Yes. Wise Choice Remodeling holds CSLB License #1104186 and carries full general liability and workers compensation coverage.