Tankless Water Heater Services

Northern Virginia’s Locally Trusted Tankless Water Heater Professionals

Enjoy hot water on demand, lower energy bills, and more space in your home with a tankless water heater—installed and serviced by the trusted pros at Falcon Heating, Air Conditioning & Plumbing. We’ve been helping homeowners in Arlington, Alexandria, Fairfax, Sterling and all across Northern Virginia upgrade to efficient, on-demand systems for years, offering expert guidance, top-quality equipment, and reliable repair and maintenance services. Whether you’re replacing an old unit or installing tankless for the first time, we make sure it’s done right—backed by decades of experience and local know-how.

Explore Your Tankless Water Heater Options

Before you can enjoy everything tankless heaters have to offer, it’s important to choose a system that matches your needs. Falcon Heating, Air Conditioning & Plumbing has a wide range of high-quality tankless water heater options from Navien, the leader in tankless technology. Our knowledgeable staff can accurately assess your requirements and provide free, no-obligation quotes that fit nearly any budget.

If you’re ready for a smarter solution to your hot water needs, just call Falcon Heating, Air Conditioning & Plumbing for top-notch products and award-winning customer service. You’ll see why we’re one of the region’s premier sources for tankless water heater services.

Tankless Water Heater Installation Process: What to Expect

Switching to tankless is an engineering upgrade for your home. When you choose Falcon, here is the professional process our team follows:

Common Tankless Repair Issues in Northern Virginia

Northern Virginia’s water is moderately hard, meaning it carries a high mineral content. Unlike traditional tanks where sediment sits at the bottom, minerals in a tankless system “bake” onto the heat exchanger, leading to specific failures:

Don’t let a failing flow sensor or mineral buildup compromise your home’s comfort. Whether you’re dealing with inconsistent temperatures, system error codes, or a complete loss of hot water, Falcon’s veteran technicians provide the precision diagnostics and factory-authorized parts needed to restore your system. We don’t just patch symptoms—we optimize your tankless unit for the specific hard-water conditions of Northern Virginia to ensure long-term performance and efficiency.

Frequently Asked Questions: Tankless Water Heater Experts

Why does my tankless water heater display an error code?
Modern tankless units use built-in diagnostics to flag performance issues early. Common codes we see in Northern Virginia include ignition or flame failures (often tied to gas pressure or dirty igniters) and scale-related warnings that signal mineral buildup inside the heat exchanger. Noting the exact code before calling Falcon helps our technicians arrive prepared with the right parts for a faster first-visit resolution.

How does Northern Virginia’s water quality affect my unit?
Hard water across Fairfax, Loudoun, and surrounding counties is one of the biggest threats to tankless performance. Calcium and magnesium minerals can accumulate inside the heat exchanger, restricting flow and reducing efficiency. Without routine professional descaling, this buildup can eventually damage critical components, which is why annual maintenance is strongly recommended in the NoVA region.

Can I run multiple showers at once with a tankless system?
Yes—when the unit is properly sized. Tankless systems are rated by gallons per minute (GPM), and sizing must account for your home’s peak hot water demand and Northern Virginia’s colder groundwater temperatures. Falcon performs detailed load calculations to ensure your system can handle simultaneous uses like showers, laundry, and dishwashing without temperature drops.

Why is there a delay before the hot water reaches my faucet?
Tankless systems heat water instantly at the unit, but the water still has to travel through your plumbing lines. Homes with longer pipe runs may notice a short wait. Installing a recirculation pump—available on many premium systems—keeps hot water closer to fixtures, reducing wait time and minimizing water waste.

What are the specific venting requirements for a tankless upgrade?
High-efficiency gas tankless units require specialized venting and cannot use standard water heater vents or most masonry chimneys. These systems typically vent through PVC or stainless steel piping routed through an exterior wall. Falcon handles all code-compliant vent design, core drilling, and sealing to meet Virginia safety standards.

Do I need to upgrade my gas line for a tankless installation?
In many homes, yes. Tankless units require significantly higher BTU input than traditional tank heaters, which often means upsizing the gas line. Our certified plumbers perform a full gas load calculation to verify your system can support the new unit without affecting other gas appliances.

How long will a Falcon-installed tankless unit last?
With proper annual maintenance, most quality tankless systems last 20 years or longer—often twice the lifespan of traditional tank heaters. Because components are serviceable, routine care helps protect efficiency, extend equipment life, and maximize your long-term investment.

Where does Falcon provide tankless water heater services?
Falcon delivers tankless water heater installation, repair, and maintenance across Northern Virginia, including Fairfax, Loudoun, Prince William, and Arlington counties. Our locally based technicians understand regional water conditions, permitting requirements, and code standards, allowing us to deliver faster, more reliable service throughout the NoVA corridor.