Your furnace works hard to keep your home warm during Winnipeg’s long winters, and your filter plays a surprisingly big role in keeping it running efficiently. But how often should you actually change it? The answer depends on your home, your furnace, and your lifestyle.
Why Furnace Filters Matter
Furnace filters trap dust, allergens, pet dander, and other debris. A clean filter means:
Better air quality inside your home
Improved furnace efficiency (lower heating bills)
Longer lifespan for your furnace system
A dirty filter makes your furnace work harder, which can lead to breakdowns or higher energy costs.
General Guidelines
Most manufacturers recommend changing furnace filters every 3 months, but this isn’t one-size-fits-all. Consider the following factors:
Type of Filter
Standard fiberglass: change every 1–3 months
Pleated high-efficiency: 3–6 months
HEPA filters: check manufacturer guidelines; usually 6–12 months
Home Environment
Pets: Homes with cats or dogs may need filter changes every 1–2 months
Allergies: If anyone in your home suffers from allergies, check monthly
Dust levels: If you live in a construction-heavy area or near dirt roads, change more frequently
Furnace Usage
Winter months: filter may clog faster due to heavy use
Summer months (if furnace is off but air conditioning uses the same system): check at least once per season
Signs You Need to Change Your Filter
Even if it hasn’t been 3 months, replace your filter if you notice:
Visible dirt, dust, or discoloration
Decreased airflow from vents
Higher heating bills
Furnace running longer than usual to maintain temperature
Quick Tips for Winnipeg Homeowners
Mark your calendar or set a reminder every 1–3 months.
Keep spare filters handy—running out during the middle of a cold snap is never fun!
Always check your furnace manual for manufacturer-specific guidance.
My Take
Regular filter changes are one of the easiest, most cost-effective ways to keep your furnace and home in top shape. In Winnipeg winters, a clean filter isn’t just convenient—it’s essential for comfort, efficiency, and safety.