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414-209-4668
Aerial view of a lakeside Wisconsin neighborhood in early autumn.

Your Milwaukee, WI, Tankless Water Heater Experts.

Tankless water heaters instantly heat your water whenever you turn on the tap. You save on energy costs and enjoy a virtually endless supply of hot water.

In recent years, more Wisconsin homeowners have gone “tankless,” and it’s not hard to see why. Tankless heaters are minimal and sleek—a small metal box that mounts to your wall. They take up way less space than a conventional 60-gallon tank.

That means more storage room and less of an eyesore. Plus, tankless systems last longer than a standard water heater.

Our team at Midwest Heating & Cooling takes a lot of pride in helping our customers in Milwaukee, WI, and all the surrounding communities spend less on utilities while lowering their carbon footprint. We specialize in finding practical plumbing solutions that fit your budget and lifestyle.

Our licensed Waukesha County plumbers can help you decide the best water heating system for your home. Call us today at 414-209-4668 for a free consultation.

How Does a Tankless System Work?

Whenever you turn on the faucet or start your dishwasher, water passes by a heating element in the tank and heats it to the designated temperature. Unlike a conventional water heater that constantly uses energy to heat water, this is true on-demand hot water.

Tankless water heaters have several advantages over standard water heaters. They’re much more efficient than storage tanks since you are not continuously burning fuel or using electricity to keep the water warm. Tankless systems heat water when needed.

They also have a much smaller footprint than conventional tank water heaters. There are many more places to install a tankless version, whether in a closet or a corner of your basement.

Why Choose a Tankless Water Heater for Your Waukesha County Home?

A tankless water heater offers a modern solution for on-demand water heating, eliminating the need for a bulky storage tank. They boast several advantages over traditional models, including:

  • Energy Efficiency: Tankless heaters only heat water when needed, leading to significant energy cost savings compared to constantly heating a tank of water.
  • Space Saving: Their compact size allows for flexible installation in tight spaces.
  • Longer Lifespan: With proper maintenance, tankless heaters can last over 20 years, exceeding the lifespan of traditional models.
  • Endless Hot Water: Unlike tank heaters, which have a limited supply, tankless models provide a continuous flow of hot water.

These savings start to add up over time. According to the U.S. Department of Energy (DOE), water heating is the second largest expense in your home, accounting for up to 18 percent of your utility bills.

Tankless Water Heater Installation and Replacement

Need a new water heater? Upgrade to tankless—we know you’ll be pleased with the difference. Let our team of certified specialists help you out. We bring years of trusted craftsmanship and friendly customer service to the table.

Want to replace your conventional water heater with a tankless model? Our team can easily replace your old water heater with a new tankless model.

Every home is unique. Before performing any replacement, we take a detailed inventory of your water system and make calculations to ensure we find a product that’s right for you. Converting to tankless is an upgrade, but it wouldn’t feel like one with an undersized heater.

Tankless heaters have a lower flow rate, meaning they handle less water than a larger tank. For instance, a single tankless heater might not produce enough hot water to run multiple appliances simultaneously if your home is very large.

However, a Midwest Heating & Cooling professional can install more than one tankless unit when necessary to provide the perfect amount of water to meet your Milwaukee, WI, home’s needs.

To protect our natural resources, save on your utilities, and avoid cold showers, tankless water heaters are a fantastic investment.

Be sure to discuss financing with us if that can help. We offer several options to suit most homeowners’ needs.

Understanding Your Tankless System

There are two main types of tankless water heaters:

  • Whole-Home Tankless: These function similarly to traditional heaters but offer superior efficiency. They are ideal for large households with high hot water demand.
  • Point-of-Use: These smaller units provide hot water to a single fixture, like a kitchen sink or shower. They are perfect for supplementing a whole-home system or ideal for smaller homes.

Where Can I Install a Tankless Water Heater?

  • Basement: A popular choice due to easy access to plumbing and ventilation.
  • Garage: If well-insulated and properly ventilated, a garage can be a suitable location.
  • Utility Closet: This is a convenient spot if you have one, especially if it’s close to plumbing and electrical connections.
  • Inside a Wall: In some cases, a tankless water heater can be installed within a wall cavity, saving space.
  • Outside Wall: If your climate allows, an outdoor installation can be a good option, especially if you have limited indoor space.

Where Can I Install a Point-of-Use Tankless Water Heater?

  • Under the Kitchen Sink: Provides instant hot water for dishwashing.
  • Under the Bathroom sink: Delivers hot water quickly for showers and baths.
  • Laundry Room: Heats water for washing machines.
  • Outdoor Spigot: Warms water for outdoor chores or gardening.

Tankless Water Heater Repairs

Tankless water heaters are known for their reliability—but they do experience the occasional breakdown. If you notice irregularities with your water heater, don’t wait—protect your investment.

Here are some of the most common tankless water heater repair issues:

  • Mineral Buildup: Hard water can lead to mineral deposits on the heat exchanger, reducing efficiency and potentially causing damage. Regular flushing and professional cleaning can help prevent this.
  • Insufficient Hot Water: If multiple hot water sources are used simultaneously, the heater might struggle to keep up. Upgrading to a larger unit or installing a point-of-use heater might be necessary.
  • Ignition Failures: Electrical connection issues or faulty gas valves can prevent the heater from igniting. Contact Midwest Heating & Cooling for prompt diagnosis and repair.
  • Temperature Fluctuations: Inconsistent water temperature can be frustrating. This could be due to mineral buildup, a faulty temperature sensor, or a problem with the flow rate.
  • Noise: Excessive noise can indicate a problem with the unit, such as a loose component or a failing pump.

Our team of seasoned professionals can quickly diagnose and treat any plumbing issues in your Milwaukee, WI, home. We’ll always give you a prompt and honest assessment. We don’t want you to spend money on unnecessary repairs, so we’ll also provide a fair estimate before performing any repairs.

If you run into a tankless emergency, our professionals are here for you 24/7. We understand emergencies happen at all hours of the day and night.

Tankless Water Heater Maintenance

Yearly preventative maintenance is a must to keep your tankless water heater running at peak efficiency. Problems can go unnoticed, cutting short their long life span.

Let one of our Midwest Heating & Cooling licensed plumbers perform a tune-up to preserve your investment.

Our maintenance inspection includes an assessment of all your home plumbing. We’ll catch issues before they arise and provide valuable ways to save on your utility bill.

What to expect during a tankless water heater inspection:

A licensed plumber from Midwest Heating & Cooling will perform a comprehensive inspection that typically includes:

  • Flushing the System: Removing sediment buildup to restore optimal water flow and heat transfer.
  • Anode Rod Inspection: Checking the anode rod, which protects your heater’s tank from corrosion.
  • Pressure Relief Valve Testing: Ensuring the safety valve functions properly to prevent pressure buildup and potential leaks.
  • Electrical and Gas System Inspection (depending on model): Verifying safe and efficient operation of the electrical or gas components.

With our busy lifestyles, we sometimes forget about necessities. Join our Maintenance Care Plans for an automatic reminder when your water heater and other plumbing equipment are due for maintenance. You’ll also receive priority service, significant discounts, and more.

Learn More About Tankless Water Heaters Today

Midwest Heating & Cooling is pleased to serve our neighbors in Milwaukee, WI, and the surrounding areas. We build relationships with our customers that last a lifetime. Call us at 414-209-4668 or request service online for a free quote.

Need Tankless Water Heater Service?

Contact the experts at Midwest Heating & Cooling.

Call us at 414-209-4668

Customer Reviews



September 15, 2026

I could not be happier with my experience with Midwest Heating & Cooling. From my initial call this morning regarding my air conditioning issue, the team was responsive, professional, and easy to work with. They quickly scheduled a service appointment, sent a text notification when I was next in line, and Brady called with an accurate estimated time of arrival. He arrived right on time and immediately made a great impression. Brady was truly outstanding. He was knowledgeable, professional, and took the time to explain everything clearly in a way that was easy to understand. He walked me through my options without any pressure and helped me feel confident about choosing the best solution for my home. It was clear that Brady takes pride in his work and represents Midwest Heating & Cooling exceptionally well. Every part of the experience was positive, and I would highly recommend both Brady and the company to anyone in need of service.

- Jason R.


August 6, 2026

I had an AC replacement with Midwest. The service from the first visit for estimation all the way to completion was incredibly professional. They were respectful and cleaned up after themselves. I had a few issues with my new unit, they went above and beyond in terms of communication and making sure they could correct the issue as soon as possible. While every Midwest tech I’ve met so far has been great, but shout out to Garrett for checking in multiple times and taking time to help troubleshoot.

- Meera P.