Commercial Plumbing Maintenance Spotlight: Tankless Water Heater Flushing at Red Roof Inn in Salem, NH

Keeping Hot Water Systems Running Efficiently with Routine Maintenance

When it comes to commercial properties, reliable hot water isn't just a convenience—it's a necessity. Hotels depend on consistent hot water to keep guests comfortable and daily operations running smoothly.

Recently, our Denommee plumbing team visited the Red Roof Inn in Salem, NH, to perform routine annual maintenance on an A. O. Smith tankless water heater. The service included flushing the system to remove mineral buildup, maintain efficiency, and help keep the equipment in accordance with manufacturer maintenance and warranty requirements.

Why Is Tankless Water Heater Maintenance Important?

Unlike traditional water heaters that store hot water in a tank, tankless water heaters heat water on demand as it flows through the system. While this design offers several advantages, tankless systems still require regular maintenance to operate efficiently.

Over time, minerals naturally present in water, particularly calcium and magnesium, can accumulate inside the heat exchanger. This buildup, commonly known as scale, can restrict water flow and reduce heat transfer efficiency.

Without routine maintenance, mineral buildup can contribute to:

• Reduced heating efficiency and increased energy consumption

• Inconsistent hot water temperatures

• Restricted water flow

• Additional strain on internal components

• Premature equipment wear and potential service interruptions

For commercial properties such as hotels, these issues can affect both operating costs and guest satisfaction.

The Tankless Water Heater Flushing Process

Flushing a tankless water heater is an important preventative maintenance procedure that helps remove mineral deposits from the system's heat exchanger.

Here's an overview of the process our plumbing professionals follow when servicing a tankless water heater, with specific steps adjusted to the manufacturer's instructions and the equipment's configuration.

Step 1: Shutting Down and Isolating the System

Before beginning maintenance, the technician safely shuts down the water heater according to the manufacturer's instructions.

The water supply is isolated using the appropriate service valves, allowing the heat exchanger to be flushed without circulating the cleaning solution through the building's plumbing system.

Step 2: Connecting the Flushing Equipment

Once the system is isolated, the technician connects specialized flushing equipment to the water heater's service ports.

This typically includes a circulation pump, hoses, and a container holding a manufacturer-approved descaling solution.

The equipment allows the cleaning solution to circulate through the heat exchanger to loosen and remove accumulated mineral deposits.

Step 3: Circulating the Descaling Solution

With the flushing equipment connected, the technician circulates the approved descaling solution through the heat exchanger for the duration specified by the manufacturer.

As the solution moves through the system, it helps break down calcium and other mineral deposits that can accumulate during normal operation.

This is one of the most important steps in maintaining the water heater's heating performance and efficiency.

Step 4: Rinsing the System

After the descaling process is complete, the cleaning solution is drained and the heat exchanger is thoroughly rinsed with clean water according to the manufacturer's procedures.

This removes remaining cleaning solution and loosened mineral deposits before the water heater is returned to normal operation.

Step 5: Restoring Operation and Checking Performance

Once the flushing process is complete, the technician disconnects the flushing equipment, restores the water supply, and returns the water heater to service.

The system is then checked for proper operation, including water flow, temperature performance, and any signs of leaks or error codes.

These final checks help confirm the equipment is operating as intended following maintenance.

Protecting Efficiency, Equipment Life, and Manufacturer Warranties

Routine flushing does more than remove mineral buildup. It is an important part of protecting the long-term performance of a tankless water heater.

Following the applicable maintenance schedule and keeping service records can help support warranty compliance. 

For commercial properties with frequent hot water demand, preventative maintenance can also help reduce the likelihood of unexpected equipment failures and costly disruptions.

Why Preventative Maintenance Matters for Hotels

Hotels experience consistent hot water demand throughout the day, from guest showers and bathroom sinks to cleaning and other daily operations.

A poorly maintained water heating system can lead to reduced performance, increased operating costs, and unexpected interruptions that affect guests and staff.

By scheduling routine maintenance, commercial property managers can take a proactive approach to keeping their plumbing systems operating reliably.

At the Red Roof Inn in Salem, NH, this annual tankless water heater flushing service was part of that preventative approach—helping maintain the A. O. Smith system's efficiency and supporting its long-term performance.