
High-efficiency gas boilers for hydronic heating, radiant floors, and domestic hot water. TSSA licensed installation, sized right, done right the first time.
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A homeowner in Port Credit called us about replacing a 30-year-old cast-iron boiler. The system still worked, but the efficiency was poor and the annual repair costs were adding up. We replaced it with a high-efficiency combi boiler that handles both space heating and domestic hot water from a single unit. The old water heater came out at the same time, freeing up significant space in the mechanical room. The homeowner's gas bills dropped noticeably in the first winter. That kind of upgrade is one of the most straightforward improvements you can make to an older Mississauga home with a hydronic heating system.
Many homes in Mississauga were built with hydronic heating systems and still have boilers that are 20 or 30 years old. Modern high-efficiency condensing boilers operate at 95% AFUE or higher, compared to 60 to 70% for older cast-iron units. The difference shows up directly on your gas bill.
Beyond efficiency, today's boilers offer combi configurations that eliminate the need for a separate water heater, precise zone control, and quiet operation that older systems cannot match.

We install and replace all types of residential gas boilers, from straightforward replacements to full hydronic system upgrades.
Modern condensing boilers operate at 95% AFUE or higher, extracting heat from combustion gases that older boilers vent away. If your current boiler is more than 15 years old, upgrading to a high-efficiency unit is one of the most impactful improvements you can make to your home's heating costs.
A combi boiler provides both space heating and domestic hot water from a single compact unit. No separate water heater, no storage tank, and no standby heat loss. Ideal for homes with moderate hot water demand and limited mechanical room space.
We replace all makes and models of residential gas boilers. Whether your system has failed or you are upgrading proactively, we assess your home's heating load, recommend the right replacement, and complete the installation with minimal disruption to your home.
We assess your home's heating load, existing hydronic system, and mechanical room. We confirm the right boiler size and configuration for your home and give you a firm quote before anything is ordered.
We recommend the right boiler model for your home's requirements, confirm availability, and schedule installation. Most standard boiler replacements are completed in one day.
We handle all gas, water, and electrical connections to code. The existing boiler is decommissioned and removed. If a combi boiler is being installed, the existing water heater is removed at the same time.
After installation, we commission the system, test all zones, and confirm proper operation. We walk you through the new controls and maintenance requirements before we leave.

A new high-efficiency boiler is a significant investment, typically ranging from $4,000 to $8,000 depending on the unit and scope of work. We offer flexible financing so you can move forward without the financial pressure.
We offer flexible financing through trusted lenders, including 0% interest for 12 months with approved credit. Monthly payment plans are available to fit any budget.
We assess your home, recommend the right boiler, and give you a firm quote before any work begins. No surprises on the final invoice.
An oversized or undersized boiler costs more to run and wears out faster. We size every installation correctly based on your home's actual heating load.
All boiler installations are backed by our labour warranty and the manufacturer's equipment warranty. If something goes wrong, we stand behind our work.
Boiler installation in Ontario requires a TSSA license. Our technicians are fully licensed and certified to install and commission gas-fired boiler systems up to code.
As authorized contractors for leading HVAC manufacturers, we source and install only proven, high-efficiency equipment backed by manufacturer warranties.








A furnace heats air and distributes it through ductwork. A boiler heats water and distributes that water through pipes to radiators, baseboard heaters, or radiant floor systems. Boilers tend to provide more even, comfortable heat and are the standard in many older Mississauga homes that were built with hydronic heating systems.
A combi (combination) boiler provides both space heating and domestic hot water from a single unit. It eliminates the need for a separate water heater, saving space and reducing equipment costs. Combi boilers are an excellent choice for homes with moderate hot water demand.
A well-maintained high-efficiency gas boiler typically lasts 15 to 20 years. Cast-iron boilers can last considerably longer, though they operate at much lower efficiency than modern condensing units. Annual maintenance is the single biggest factor in maximizing boiler lifespan.
Boiler sizing is based on a heat loss calculation for your home, which accounts for square footage, insulation levels, window area, ceiling height, and local climate. An oversized boiler short-cycles and wastes fuel. An undersized one cannot maintain temperature on cold days. We size every installation correctly.
A typical boiler installation involves removing the existing unit, installing the new boiler and making all gas, water, and electrical connections, commissioning the system, and testing all zones. If it is a combi boiler, the existing water heater is also decommissioned. Most installations are completed in one day.
We install and service boilers from leading manufacturers including Navien, Rinnai, Bosch, Viessmann, Weil-McLain, and Burnham. We recommend the brand and model that best fits your home's requirements and budget.
Yes. We serve all of Mississauga including Port Credit, Lakeview, Clarkson, Streetsville, Erin Mills, Cooksville, and Malton, as well as the broader GTA including Etobicoke, Oakville, and Burlington.
Contact Beyond HVAC today for boiler installation in Mississauga. TSSA licensed, properly sized, and backed by our labour and equipment warranty.