Common HVAC Misconceptions

At Porter Brothers, we frequently encounter customers who have been misled by common HVAC myths. One of the most persistent misconceptions we hear is that every homeowner must replace their air filters monthly, regardless of circumstances.

Understanding Filter Replacement Facts

The truth is far more nuanced than this one-size-fits-all approach. While some households may indeed benefit from monthly filter changes, others can safely extend this interval. Several factors influence how often you should change your air filter:

  • Pet ownership and quantity
  • Number of occupants
  • Local air quality
  • Filter quality and thickness
  • System usage patterns

The Real Timeline

For most households, here’s a more accurate replacement schedule:
• Basic 1-inch filters: Every 2-3 months
• High-quality pleated filters: Every 3-6 months
• Homes without pets or allergies: Every 6 months
• Premium whole-house filters: Annually

Why This Matters

Unnecessarily frequent filter changes not only waste money but can also create unnecessary environmental waste. However, waiting too long between replacements can strain your system and reduce efficiency.

The best approach is to check your filter monthly and replace it when it appears dirty, or follow the manufacturer’s specific recommendations. If you’re unsure, our Porter Brothers technicians can help establish the ideal replacement schedule for your specific situation during routine maintenance visits.

Remember, proper filter maintenance is just one component of a well-functioning HVAC system. Regular professional maintenance remains crucial for optimal performance and longevity.

Back To Top