Tankless Water Heaters
A tankless water heater measures roughly the size of a small suitcase mounted on a wall, yet it can supply hot water continuously for as long as a faucet stays open. That single characteristic separates it from the familiar storage tank that has served homes for generations. Instead of keeping 40 or 50 gallons of water heated around the clock, a tankless unit fires up only when you turn on a hot water tap, heats the water as it flows through a heat exchanger, and shuts off when demand ends. The result is hot water on demand and no standby energy loss from a tank sitting in a basement or utility closet.
At Alan Energy Services, we install, service, and replace tankless water heaters for homeowners who want steady hot water and lower operating costs. We are proud to provide the best in HVAC and indoor air quality services to residential customers throughout Elmhurst and the surrounding communities, and tankless water heating fits naturally into that work. Whether you are building a new home or replacing a storage tank that has reached the end of its life, we can help you find the right unit and install it correctly.
How a Tankless Water Heater Produces Hot Water
The operating cycle starts the moment you open a hot water tap. A flow sensor inside the unit detects water movement and signals the control board to ignite the burner in a gas model or energize the elements in an electric model. Cold water then passes through a series of coils, called the heat exchanger, where it absorbs heat and rises to the target temperature before it reaches your faucet. When you close the tap, the flow stops, the sensor registers the change, and the burner shuts down. There is no reheating cycle because there is no stored water to keep warm.
Because the heat transfer happens in real time, sizing is based on flow rate rather than tank volume. A tankless water heater is rated in gallons per minute, or GPM, and that number depends on how much the unit can raise the incoming water temperature. In our region, groundwater arrives cold during winter, which means the unit has to work harder to reach a comfortable 120 degrees Fahrenheit. We take that temperature rise into account so the unit you receive can keep up with your household during the coldest months, not just in mild weather.
Choosing the Right Unit for Your Home
No two homes place the same demand on a water heater, so we begin every project with a conversation about how your household uses hot water. A family that runs a shower, a dishwasher, and a washing machine at the same time needs more capacity than a couple in a smaller home. We calculate peak simultaneous demand, then match it to a unit that can deliver that flow at the temperature you want. Undersizing leads to disappointing lukewarm water during busy mornings, while oversizing wastes money on capacity you will never use.
The main decisions we help you weigh include the following:
- Fuel type: Natural gas units generally provide higher flow rates and lower operating costs, while electric units are simpler to vent and suit homes without a gas line.
- Whole-house versus point-of-use: A single central unit serves the entire home, while smaller point-of-use models sit near a remote bathroom or addition to eliminate the long wait for hot water.
- Condensing versus non-condensing: Condensing models capture extra heat from exhaust gases for higher efficiency, while non-condensing models cost less up front and use different venting.
We walk you through each of these choices with the specifics of your home in mind, including gas line capacity, available venting paths, and electrical service. Our goal is a unit that performs the way you expect for years, not a one-size-fits-all recommendation.
Our Installation Process from Start to Finish
A proper installation is what separates a tankless water heater that runs reliably for two decades from one that struggles or fails early. Our process begins with a site assessment where we inspect your existing plumbing, gas supply, venting, and electrical connections. Gas tankless units in particular often need a larger gas line than a storage tank required, because they draw a high burst of fuel when firing. We confirm that supply before any equipment arrives so there are no surprises mid-project.
Once the unit and materials are on site, our technicians complete the installation in a clear sequence:
- Remove the old equipment: We safely disconnect and drain the existing water heater, then cap or reroute lines as needed.
- Mount the new unit: The tankless heater is fixed securely to the wall in a location that allows for proper clearances and future service access.
- Connect water, gas, and venting: We run the cold and hot water lines, tie in the gas supply, and install stainless steel or PVC venting matched to the unit type.
- Wire the controls and set the temperature: The control board is powered and programmed, and we set the output temperature to a safe, comfortable level.
- Test and verify performance: We check for leaks, confirm ignition, measure flow and temperature, and verify that combustion venting operates correctly.
Before we leave, we show you how the unit works, where the shutoffs are located, and what routine care keeps it running smoothly. A clean, documented installation protects both your investment and your family’s safety.
Where Tankless Water Heaters Make the Biggest Difference
Homeowners choose tankless units for a range of practical reasons. Families who have run out of hot water during back-to-back showers appreciate the endless supply, since the unit heats water continuously rather than draining a finite tank. Others value the space savings, because removing a bulky storage tank frees up a corner of a basement, closet, or garage. In homes with limited floor area, that reclaimed space is a meaningful benefit.
Energy efficiency is another strong motivator. A storage tank reheats water throughout the day and night whether you use it or not, and that standby loss adds up over the years. A tankless water heater eliminates that waste by heating water only when you need it. Vacation homes and rental properties benefit as well, since the unit sits idle without consuming energy when no one is drawing water. Longer service life rounds out the appeal, as a well-maintained tankless unit often outlasts a conventional tank by a wide margin.
Maintenance That Protects Your Investment
Like any appliance that handles water, a tankless unit performs best with regular care, and hard water is the main concern in our area. Minerals in the water supply can build up as scale inside the heat exchanger, which reduces efficiency and can eventually cause the unit to overheat or shut down. We recommend periodic descaling, a service in which we flush the heat exchanger with a cleaning solution to dissolve mineral deposits and restore full flow. Homes with especially hard water may benefit from a water softener paired with the heater.
Beyond descaling, routine maintenance includes cleaning the inlet screen filter, inspecting the venting for obstructions, and checking the burner and combustion for gas models. Our technicians handle these tasks efficiently and can set up a maintenance schedule so the work happens before problems appear. When you want dependable tankless water heater service in Elmhurst, Naperville, and the surrounding areas, Alan Energy Services is ready to help you keep hot water flowing.
If you are considering an upgrade or need service on an existing unit, reach out to us. We will assess your home, explain your options in plain terms, and deliver an installation built to last across Elmhurst.
