Combi Boilers in Uxbridge, ON
Family-Owned Combi Boiler Service. Over 7,000 Units Serviced.
A combi boiler handles both space heating and hot water from a single compact unit, with no separate storage tank required. Hot water is delivered on demand, and the system takes up a fraction of the space a traditional boiler-and-tank setup needs. At Marx Mechanical Heating and Cooling, we install, repair, and maintain combi boilers for homeowners across Uxbridge, Ontario and the surrounding communities.
Our family-owned team brings over 20 years of collective experience in heating and cooling. When something goes wrong, we offer 24/7 emergency service so you’re not left without heat or hot water.
Call (289) 301-0414 to schedule service or request a free estimate from our Uxbridge team.The Marx Promise: Cost, Efficiency, & Reliability
Every job we take on is guided by The Marx Promise: delivering service that balances cost, efficiency, and reliability rather than steering you toward the most expensive solution. As a family-owned business, we give practical advice based on your actual heating needs, not a sales script.
Our licensed technicians have serviced over 7,000 units across the region, and we hold a 4.9 rating on Google. We also maintain manufacturer partnerships, including status as a Daikin Comfort Pro Partner, which gives us access to energy-efficient equipment and technical resources that benefit our clients directly.
Combi Boiler Services in Uxbridge, ON
Our licensed technicians install, repair, and maintain combi and hydronic boiler systems. Every installation begins with an in-home assessment of your heating load, existing infrastructure, and hot water requirements. We handle the permitting process to keep your installation code-compliant. Boiler work in Ontario is regulated by the Technical Standards and Safety Authority (TSSA), which oversees registration and inspection requirements for most systems. Most residential installations are completed in one to two days, depending on complexity and whether existing infrastructure needs modification.
Brands We Service
We focus on servicing and repairing Navien combi boiler systems, which are among the most common high-efficiency units installed in Ontario homes. Our technicians also work on a wide range of other combi and hydronic brands:
- Viessmann
- IBC
- NTI
- Lochinvar
- Triangle Tube
- Rinnai
- Baxi
- Buderus
If your system isn’t on this list, call us. Chances are we’ve worked on it.
Make Marx Your First Choice Read Some of Our Five Star Reviews
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"My experience was outstanding!"
Each member of the team went out of their way to ensure I was well taken care of. In a world where everyone wants to cut costs by outsourcing and automating, Marx demonstrates the value of personal touch and putting the needs of their clients first.
Blake M. -
"Super work!"
Marx Mechanical Heating and Cooling did a wonderful job in repairing our ductless heat pump system. I highly recommend the company.
Leland D. -
"I would highly recommend Marx Mechanical!"
Marx Mechanical replaced our old furnace with a new heat pump which has kept our house warm all winter. They worked with us to find the perfect system for our home and our unique needs.
Serena E. -
"Every step was smooth and competently handled."
We contracted Marx to replace our aging oil furnace with a high-efficiency heat pump. They arrived, promptly and prepared, on the agreed-upon installation date, protected walls and floors, worked diligently, and cleaned up afterward. Very professional!
Jabette B. -
"Bravo!"
The Marx Team came to our rescue when our furnace was on the fritz and installed a new one with exceptional installation standards and had us up and running in no time! They are without a doubt the "Go To" HVAC company in the Durham-York Region!
Brian B. -
"They have earned my trust!"
I received a quick reply from Marx and they were able to see me even faster than promised. In my conversations with the repair person, I felt that he knew his stuff and provided a lot of helpful information. I will continue to call on them when needed.
Dave M. -
"I highly recommend this company!"
I had a new heat pump installation by Marx Mechanical. Thank you Jason, TJ & Tyler. Very professional company to work with. I couldn't be happier with the installation; it exceeds my expectations.
Susan C. -
"Excellent HVAC company to work with!"
They took time to work with us to get the best furnace/heat pump to replace our 20-year-old furnace. They've checked in with us regularly, and while we haven't had any issues, we know that they would go above and beyond to fix anything!
Val R.
What to Expect During Installation
Our installation process is straightforward from first contact to final walkthrough. We start with a site assessment to evaluate your home’s heating capacity requirements and efficiency goals. From there, we help you select the right unit based on factors like home size, existing venting configuration, and AFUE rating targets. Once the system is selected, we manage permitting, complete the installation, and conduct a full startup. Before we leave, we can walk you through how to operate your new system and answer any questions you have.
Request a Free Combi Boiler Estimate
Whether you’re replacing an aging system or considering your first combi boiler, we’re ready to help. We offer a free estimate for boiler services and financing through our partnership with Financeit. If your current system needs a checkup, our 20-point boiler tune-up, visual inspection, and safety checklist is available for $229.
Call (289) 301-0414 to reach Marx Mechanical Heating and Cooling any time. We’re available 24/7 for Uxbridge, ON homeowners who need prompt, reliable combi boiler service.
What Makes Us Different? Benefits of Working with Our Expert Team
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Local Values - Exceptional ServiceBeing family-owned and operated means more than just business to us—it’s about building lasting relationships. We’re proud to serve our community with care, integrity, and quality you can trust.
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Year-Round Comfort With Our MembershipsOur membership plans are designed to keep your systems running smoothly all year long. Enjoy exclusive perks like priority service, discounted repairs, and regular maintenance.
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Team of Highly Experienced HVAC Technicians
With decades of industry experience, Marx Mechanical Heating and Cooling delivers expert HVAC solutions with precision, reliability, and quality service.
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Transparent, Upfront Pricing
We are committed to honesty and transparency in all our services. We offer upfront pricing with no hidden fees - just clear, fair quotes from an HVAC company you can rely on.
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Join the Marx Comfort ClubYear-round comfort is only a click away! Our membership plans offer priority service, discounted repairs, and more!
