Most of the housing stock here went up between 1950 and 1975: bungalows, side-splits, and back-splits in Don Mills, Bathurst Manor, and Downsview. That means mid-efficiency furnaces installed in the 1990s that are now well past their service life, B-vent chimneys shared with an old water heater, and cast iron boilers still feeding hot-water radiators in larger York Mills, Hoggs Hollow, and Bayview Village homes. We repair and replace those boilers with high-efficiency condensing models, and add ductless mini-splits for cooling where the house has no ductwork.
The pattern we see most often is a cracked heat exchanger on a 20-plus-year-old furnace, usually caught during a fall safety check or by an Enbridge meter reader. Older shared venting is the second most common red tag cause: when a high-efficiency furnace was swapped in years ago and nobody re-sized the chimney liner for the water heater left behind.
Willowdale and the Yonge-Sheppard corridor around Mel Lastman Square also have a large stock of high-rise condo towers, townhouses, and newer infill builds. There we service in-suite fan coils, ERV ventilation and other indoor air quality upgrades, and cold-climate heat pump retrofits. As of 2026, eligible heat pump installs can qualify for rebates of up to $6,500, and we handle the paperwork for you.
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