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The Truth About HVAC Filters: Debunking the Monthly Replacement Myth


A Common Misconception in Home Comfort

One of the most persistent myths in the HVAC industry is that every homeowner needs to replace their air filters monthly, no matter what. At Lusk Heating & Air Conditioning, we frequently encounter customers who faithfully follow this advice, sometimes unnecessarily spending more money than they need to.

Here’s the Reality:

Filter replacement frequency actually depends on several factors:

  • Household size
  • Number of pets
  • Local air quality
  • Filter quality and thickness
  • System usage patterns

For example, a single person living in a clean suburban area might only need to change their filter every 3-4 months, while a family with three dogs and a cat in a dusty area might indeed benefit from monthly changes.

How to Know When It’s Time

Instead of blindly following a calendar-based schedule, we recommend:

1. Visually inspecting your filter monthly
2. Holding it up to a light source – if you can’t see light through it, it’s time for a change
3. Monitoring your energy bills for unexpected increases
4. Paying attention to dust accumulation in your home

Making informed decisions about filter replacement not only saves money but also ensures your system operates at peak efficiency. Trust Lusk Heating & Air Conditioning to provide honest, practical advice for maintaining your HVAC system, rather than following one-size-fits-all myths.

Remember: The goal isn’t to replace filters on a rigid schedule, but to maintain optimal air quality and system performance for your specific situation.