In Ontario, winter weather can be unpredictable. Heavy snowfall, drifting snow, and extended cold snaps are common across many parts of Canada. During these conditions, it is a good idea for homeowners to periodically check their furnace and hot water tank venting systems.
High-efficiency furnaces typically vent through intake and exhaust pipes that exit the home at ground level. After a significant snowfall or during periods of extreme cold, these pipes can become partially blocked by snow, ice buildup, or frost. When vents are obstructed, your heating system may not operate as intended and could shut down as a safety precaution.
Throughout the winter months, consider doing a quick visual inspection of the exterior intake and exhaust pipes, especially after storms. Make sure snow is cleared from around and below the vents, and gently remove any visible ice buildup. Keeping the area around the pipes clear allows for proper airflow and may help reduce the likelihood of unexpected service calls.
These inspections only take a few minutes and can be done safely from outside your home. Regular checks can help support efficient furnace operation and provide added peace of mind during Ontario’s colder months.
Below is an example showing the intake and exhaust pipes before and after snow and ice have been cleared.

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