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How Does a Tankless Water Heater Work?

When mornings turn cold in Kansas and the shower runs out of hot water halfway through, it reminds you how important a good water heater really is. Families across South Central Kansas are replacing old tank systems with tankless models that heat water faster and waste less energy.
At ECK Services, we help homeowners in Wichita, Hutchinson, Pratt, Kingman, and Medicine Lodge choose and install the right system for their homes. Here’s how a tankless water heater works and why so many Kansas families are making the switch.
What Is a Tankless Water Heater?
A tankless water heater, sometimes called an on-demand system, heats water only when you need it. There’s no large storage tank keeping dozens of gallons warm all day. Instead, cold water flows through the unit and is heated instantly as it passes through.
Traditional systems constantly heat and reheat water in a tank, using energy even when you aren’t running a faucet. Tankless systems skip that step. They save energy and space while still giving you steady hot water whenever you need it.
How Tankless Water Heaters Work
When you turn on the hot water, the system activates right away. Here’s what happens:
- Cold water enters the unit. When a tap opens, cool water flows into the heater through a supply line.
- Sensors detect the flow. The burner or electric element turns on automatically.
- Water moves through the heat exchanger. It warms up quickly as it flows through the coils.
- Hot water travels to your faucet. Within seconds, you have a steady stream of heated water.
- The unit shuts off when the tap closes. It stays off until you use hot water again.
Since there’s no storage tank, you don’t have to wait for water to heat or worry about running out.
Tankless vs. Traditional Water Heaters
Both types heat water, but they do it in very different ways.
- Energy efficiency: Tankless systems heat only when needed, while tanks keep water hot all day.
- Hot water supply: A tank can run out after a few long showers. A tankless unit keeps producing hot water as long as the tap is open.
- Space and setup: Tankless systems mount on a wall, freeing up floor space for storage or other utilities.
- Lifespan: With regular maintenance, tankless units can last 20 years or more. Standard tanks usually need replacement after 10 to 15 years.
- Maintenance: Both need occasional service, but tankless units should be flushed once or twice a year to prevent mineral buildup.
Benefits of Tankless Water Heaters
Kansas homeowners are switching to tankless water heaters for several practical reasons:
- Endless hot water for large families or back-to-back showers
- Lower energy bills because water heats only when needed
- Compact wall-mounted design that saves space
- Long lifespan with simple maintenance
- Cleaner operation with no tank corrosion or sediment buildup
If you want an energy efficient water heater that saves money and space, a tankless system is a strong option.

Smiling technician repairing an hot-water heater
Limitations to Keep in Mind
Tankless water heaters are efficient, but they aren’t perfect for every household.
- Higher upfront cost. The purchase and installation cost more than a standard tank.
- Limited flow rate. Using several fixtures at once can stretch the system’s capacity.
- Home upgrades. Some older homes may need gas or electrical updates before installation.
A professional plumber can review your home’s layout and help you decide what model fits best.
Why Professional Installation Matters
Installing a tankless system is more involved than replacing a traditional water heater. It takes careful planning and experience to make sure everything works safely and efficiently.
Professional installation ensures:
- Correct system sizing for your home’s hot water needs
- Safe gas or electrical connections that meet Kansas codes
- Proper venting and drainage for long-term performance
- Maintenance that keeps the system running at peak efficiency
A qualified technician will make sure your new system runs smoothly from day one.
ECK Services: Local Plumbing and Water Heater Experts
ECK Services has been serving South Central Kansas homeowners for years with honest, dependable plumbing work. Our team installs and repairs both tankless and traditional water heaters and provides 24-hour service when problems can’t wait.
We offer:
- Professional tankless and traditional water heater installation
- Reliable repairs for all major brands
- Routine maintenance for efficiency and long life
- Emergency plumbing service available day or night
- Local expertise throughout Wichita, Hutchinson, Pratt, Kingman, and Medicine Lodge
When you call ECK Services, you get a local team that knows Kansas homes, water conditions, and building codes.

Upgrade to Better Hot Water
A tankless water heater gives you comfort, efficiency, and peace of mind. It’s a smart upgrade for Kansas homeowners who want to save energy and enjoy consistent hot water every day.
For tankless water heater installation or repair in Wichita, Hutchinson, Pratt, and nearby towns, contact ECK Services today. We’ll help you choose the right system and make sure it’s installed to deliver reliable hot water for years to come.


