Tankless Water Heater Installation

We size the system for your home’s hot water demand, confirm that the gas and venting can support it, and install it to ensure reliable hot water.

Tankless Water Heater Replacement

When an aging unit fails, our tankless water heater replacement team removes the old system and matches a new one to your usage, so you are not underpowered or overpaying.

Tankless Water Heater Repair

Weak flow, error codes, no ignition, or water that runs hot then cold all indicate a fixable fault. Our tankless water heater repair service identifies the cause rather than just resetting the unit and hoping for the best.

Tank to Tankless Upgrades

Our team handles every step of the conversion, including proper sizing, gas line and venting modifications, and installation to ensure safe, reliable performance.

Preventive Maintenance Plans

A tankless system rewards regular care. We inspect, flush, and test the unit on a schedule so that small issues are caught early and your system continues to perform.

Water and Gas Line Adjustments

Many tankless problems stem from supply, not the unit. We correct undersized gas lines, water connections, and venting so the system gets the fuel and airflow it needs to run at full output.

A tankless water heater is only as good as the gas line feeding it, and this is where many Riverside upgrades fail. A traditional tank runs on about 40,000 BTU, while a whole-home tankless unit demands 150,000 to 200,000 BTU. The National Fire Protection Association, through NFPA 54, the National Fuel Gas Code, sets requirements for sizing gas piping from the meter to each appliance.

The half-inch gas line that fed your old tank often cannot deliver the volume a tankless unit needs. Without enough fuel, the unit cannot fire properly, resulting in weak flames, ignition failures, or water that swings between hot and cold.

That is why a tankless install is not a simple appliance swap. If the gas supply is undersized for the new demand, even a perfect unit underperforms, and the problem is blamed on the heater instead of the supply line.

At Lucky Air and Plumbing, we size the entire system before installation. We calculate gas demand, verify that the line and meter can support it, and upgrade the supply as needed so the tankless unit performs as the manufacturer intended.

A proper tankless installation leaves a homeowner with nothing to think about but the endless hot water. Remy Riola had a unit installed and came away impressed enough to thank the technician by name.

“Today, March 11, 2026, technician Abdou installed my tankless water heater and did an excellent job, I would say. I do appreciate him very much for the job he did! Thank you.”

That clean, complete installation is our standard for every tankless job. Done right, the only thing you notice is hot water whenever you want it. Read Remy’s full Google review.

When a water heater quits, speed matters along with guidance on what to replace it with. This Riverside customer called with a leaking, dead water heater and had a new tankless system diagnosed, chosen, and installed within a day.

“This company truly deserves 5 stars. I called Lucky Air as my water heater leaked and stopped working. Within the hour, they sent Cesar to diagnose. We opted for a tankless water heater replacement, and the next day they installed it. The installation guys, Ivan and Garret, did a great job; even Arturo, the delivery and pickup guy, was very courteous. Overall, Lucky Air is commendable for its professionalism.”

Fast diagnosis, honest guidance, and a clean next-day install are how we handle a failed heater. When yours quits, we act quickly and do it right. Read Maria’s full Google review.

Founded in 2004 and serving Riverside from our Inland Empire base, we hold CSLB C36 plumbing license number 836498 and bring over 25 years of water heater experience to the work.

• Same-day appointments when your hot water is out
• Proper sizing and gas and electric line upgrades
• Upfront pricing with zero hidden fees
• Background-checked crews who respect your home
• Free second opinion plus a price matching guarantee
• Bonded and fully insured, so your property is protected
• Preventive maintenance plans with priority scheduling
• Financing options and special discounts for tankless services

Endless hot water and lower energy bills start with a properly sized installation. We provide the tank and tankless water heater services Riverside households rely on.

Book your consultation online today.

How do I know if a tankless water heater is right for my home?

If you run out of hot water, want lower energy bills, or need to reclaim the space a tank takes up, a tankless water heater is worth considering. It heats water on demand, and we size the tankless hot water system Riverside homes need based on how many fixtures run at once.

Does my gas line need to be upgraded for a tankless unit?

Often, yes. A tankless unit demands far more gas than the tank it replaces, and the existing line is frequently undersized. We check the gas supply during the estimate and upgrade it where needed, so the unit fires correctly at full output.

Why does my tankless water heater run hot then cold?

Fluctuating temperatures usually point to mineral buildup, an undersized gas supply, or a flow-sensor issue. Our tankless water heater repair service diagnoses the issue and corrects the cause.

How often does a tankless water heater need descaling?

Most units benefit from flushing once a year, sooner in hard-water conditions. Regular maintenance cleans the heat exchanger, maintains efficiency, and extends the unit’s lifespan well beyond that of a neglected system.

Should I repair or replace my tankless water heater?

It depends on age and the fault. A sensor or valve issue on a newer unit is worth repairing, while repeated failures on an older system make replacement the smarter investment. We give you an honest assessment before you spend.

How do I schedule tankless water heater service?

Call us or book online now. We offer same-day appointments and 24/7 emergency service, so we can size, install, or repair your system fast.