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Endless hot water. Lower energy bill, fast installatio,n and repair by licensed, local technicians — available 24/7 for emergencies.


Homeowners across Chelmsford, MA, deal with these issues every day, and most often don’t realize the real cause until it gets worse. If any of these sound familiar, it’s a clear sign your water heater needs professional attention.
Ciardi Plumbing & Heating is ready to diagnose the problem and quickly and professionally restore reliable hot water to your Chelmsford home
Tankless water heater services cover everything needed to install, repair, and keep an on-demand hot water system running efficiently. In simple terms, it’s everything from setting up a new unit to fixing problems and keeping it running smoothly year after year.

Ciardi Plumbing & Heating don’t guess. We calculate your home’s exact hot water demand and recommend the right tankless unit for long-term performance.
From plumbing to gas and electrical connections, our in-house team handles everything, with no third-party contractors involved.
You’ll know the full cost before work begins. No hidden charges, no surprise add-ons after installation or repair.
We optimize every system for greater energy savings, faster hot-water delivery, and consistent year-round performance.
Getting a tankless water heater installed in Chelmsford, MA starts with a quick conversation about your home’s size, water usage, and current setup. This helps us understand what you actually need, rather than pushing a one-size-fits-all system. From there, we guide you toward the right unit and give you a clear idea of what to expect in terms of cost and performance.
Next, a licensed Ciardi Plumbing & Heating technician visits your home to check everything that matters for a proper installation: gas lines, venting, water pressure, and electrical setup. This step ensures your home is fully ready for a tankless system, so there are no surprises during installation. Once everything is confirmed, you receive a detailed, upfront quote with all costs clearly explained.
After approval, the installation is completed efficiently, usually within a single day for most Chelmsford homes. We install the system, test every connection, and ensure hot water flows properly throughout your home. Before leaving, we walk you through how everything works so you feel confident using your new system from day one.

Discover real stories from our valued clients as our technicians transform spaces seamlessly, bringing comfort without disrupting daily life.
EXCELLENT
Based on 132 reviews
Posted on Google![]()
Paula NardellaTrustindex verifies that the original source of the review is Google.
The guys (Matt and Jose) were on time, pleasant as could be, neat as a pin, efficient and knowledgeable! I could not ask for more!Posted on Google![]()
john quinnTrustindex verifies that the original source of the review is Google.
Matt did a Great Job installing the water heater and fixed issue on my heater that needed fixing very professional and would recommend themPosted on Google![]()
Dave DillonTrustindex verifies that the original source of the review is Google.
The best!Posted on Google![]()
Jon KurlandTrustindex verifies that the original source of the review is Google.
They came promptly and immediately identified the problem with my boiler which I thought was a water heater issue. They fixed it and were courteous and answered all my questions. I have used them in the past and intend to continue to used them. They were also reasonably priced.Posted on Google![]()
Dave GoldbergTrustindex verifies that the original source of the review is Google.
Ciardi is my go to! Have hired them for a few jobs and they always knock it out of the park. Friendly, knowledgeable, and efficient. Highly recommend using them!Posted on Google![]()
Maureen RichardTrustindex verifies that the original source of the review is Google.
Excellent service! Explained everything in detail. Extremely knowledgeable, efficient & helpful. Have already recommended, without hesitation, to family and friends.Posted on Google![]()
Mark QuimbyTrustindex verifies that the original source of the review is Google.
Polite, professional, informative with high attention to detail!

A tankless water heater heats water on demand instead of storing it in a tank. When you turn on a tap, cold water passes through the unit and is heated instantly, giving you continuous hot water as long as needed.
The cost depends on the unit size, brand, and installation requirements. On average, installation can range from a few thousand dollars, including equipment, labor, and any necessary upgrades like gas or electrical adjustments.
A properly maintained tankless water heater can last 15–20 years or more. Regular flushing and maintenance help prevent mineral buildup and keep the system running efficiently, prolonging its lifespan.
Yes, annual maintenance is recommended. This includes flushing the system to remove scale buildup, checking filters, and inspecting components to ensure consistent performance and efficiency.
Yes, if it is properly sized for your household’s demand. A professional assessment ensures the unit can handle simultaneous use, such as showers, laundry, and kitchen needs, without running out of hot water.