What temperature should I set my thermostat in winter?

For optimal comfort and efficiency in Ottawa winters, set your thermostat to 20-22°C (68-72°F) when you're home and awake. This range provides comfortable warmth while keeping heating costs reasonable during our cold Canadian winters.

Energy savings come from lowering the temperature when you're sleeping or away from home. Drop the temperature by 3-4°C (about 7°F) at night - most people sleep better in cooler temperatures around 17-18°C (62-65°F). If you're away for more than 4 hours during the day, lower it to 16-18°C (60-65°F). A programmable or smart thermostat makes these adjustments automatic and can save you 10-15% on heating costs.

In Ottawa's harsh winter climate, avoid setting your thermostat below 16°C (60°F) even when away. Our temperatures can drop to -30°C or lower, and setting the thermostat too low forces your furnace to work harder when you return home. It also risks frozen pipes if you have plumbing in exterior walls or unheated areas. During extreme cold snaps (below -25°C), consider keeping your home a degree or two warmer to reduce strain on your heating system.

If you're finding it hard to stay comfortable at normal settings, this could indicate issues with your furnace, ductwork, or home insulation. Common problems include dirty furnace filters (check monthly), blocked vents, or an aging furnace struggling with Ottawa's winter demands. Your heating system should maintain consistent temperatures without running constantly.

For the best winter comfort and efficiency, consider having your furnace serviced annually before heating season begins. A well-maintained system heats more evenly and uses less energy, keeping you comfortable even when Ottawa temperatures plummet.