At Heating & Cooling Two Inc., we frequently hear homeowners say they’re changing their furnace filters every single month because they believe it’s necessary for optimal performance. Let’s take a moment to debunk this costly and wasteful myth.
The Truth About Furnace Filter Replacement
The reality is that most residential HVAC systems don’t require monthly filter changes. Here’s what you need to know:
Filter Replacement Guidelines:
• Basic 1-inch filters: Replace every 3-4 months
• High-end pleated filters: Replace every 6 months
• Specialty filters: Follow manufacturer recommendations
Factors That Actually Determine Replacement Frequency:
1. Number of occupants in your home
2. Presence of pets
3. Local air quality
4. Construction or renovation activities
5. Seasonal allergies and pollen counts
Why Over-Replacing Is Problematic
Unnecessarily frequent filter changes can:
• Waste money on unnecessary replacements
• Create unnecessary environmental waste
• Potentially expose your system to more particulates during frequent changes
How to Know When It’s Really Time
Instead of following a strict monthly schedule, visually inspect your filter every 30 days. If it appears only lightly soiled, it’s perfectly fine to continue using it. When you notice significant discoloration or debris buildup, that’s your cue for replacement.
For homeowners in Rogers, Dayton, Osseo, Champlin, Maple Grove, and Otsego, MN, our technicians are always available to provide personalized guidance on filter maintenance schedules based on your specific system and household needs.
Remember: A clean filter is important, but over-replacement won’t improve your system’s performance and could be costing you unnecessary expense.
