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Greater Toronto’s Premier Home Services Company

Boiler Services

Boiler Services – Installation, Replacement, Repair

With all residential and commercial boiler problems or emergencies, give DeMarco Mechanical a call! We are fully licensed heating and cooling contractors and have comprehensive knowledge of boiler, radiator and other electrical/ mechanical problems. We offer quick dispatch within 2 hours of your call and provide exceedingly quick repairs and replacements of boilers both commercial and residential. In addition, we offer replacements of old boilers and radiators with new, energy efficient models that will save you on energy and money. We are your number one choice for furnace installation Toronto, and offer vast furnace and boiler contracting services.

Boiler Service Areas include Downtown Toronto, North York, Scarborough, Etobicoke, Vaughan, Richmond Hill, Thornhill, Markham, Aurora, Newmarket, King City, Pickering, Stouffville, Whitby, Ajax, Oshawa & more.

With our repair, replacement, inspection and maintenance services, you can quickly diagnose any issues with your heating. You don’t want to be left out in the cold of Canadian winter without heat, which is why we offer regular maintenance and safety inspections for commercial building and homes.

Boiler repair service

Our Boiler Services and Solutions in Toronto

Boiler Inspections and Cleaning: We clean and inspect heat exchangers, burners, exterior cabinet, check operating pressures and temperatures, test and measure gas pressure and draft, test relief valves, check for gas leaks and carbon monoxide, inspect venting, auto feed, backflow preventer, expansion tanks and low water cut off.

Boiler Installations: We offer space saving, energy efficient combi boilers that can heat both your home and water supply. We offer installation of wall mounted units which will free up the space that a floored unit would otherwise take up. In addition, our new boilers are energy efficient and see an increase of up to 50% in efficiency.

Condensing/Modulating Boilers: Condensing boilers recover heat which would otherwise be lost as gasses. These waste gasses travel through a heat exchanger, and the captured heat is used to pre-warm the cool water returning from your radiators. This makes the boiler more efficient and saves you energy. A modulating boiler have five separate setting, making them different from normal boilers which only have an on/off setting. A modulating boiler can detect the heat of water incoming, and adjust its heat settings to reduce fuel use when heating this water. DeMarco Mechanical offers both of these new, energy efficient boilers alongside popular furnaces from Amana, Goodman, Rheem, Payne and Lennox.


DeMarco Mechanical stocks a variety of boilers and water heaters from brands such as Bradford White, Rheem, Giant, Rinnai, Viessman, Navien, Weil McClain, NY Thermal and more. We offer condensing and modulating varieties of boilers, to further enhance the energy efficiency of your home or commercial building. We are also your number one choice for furnace repairs in Toronto, as well as boiler repairs in Toronto.

GTA Boiler Services Provider

Our company provides residential and commercial repairs, general maintenance, inspections, replacement of parts and full replacements of boilers and heating systems. With our help, you will find the best boiler to match the requirements of your home and family’s water consumption.

DeMarco Mechanical is a company invested in customer service and satisfaction. We offer you the highest standard of any service with every visit and will take the time to approach every problem with the same care and attention we would show in our own homes.

With the help of our highly skilled Technicians, your repairs and replacements will be done in no time at all. There is no job too big or too small for our company, and we always take the time to ensure 100% customer satisfaction in every aspect of our job. Each repair is done with the highest quality parts which match your equipment and offer a 30-day warranty with every repair or part used.

Our highly trained professionals will ensure that the job is done correctly the first time. Our company also believes in creating a good relationship with our customers, which is why we offer multi equipment discounts, service contracts and highly competitive rates throughout the entire GTA. We are your top HVAC contractors in Toronto and the area!

Call us today to schedule an appointment! We are 10/10 rated on HomeStars and Google.