Optimal Filter Change Sweet Spot

Optimal Filter Change Sweet Spot

From Let's Talk Clean Air | Camfil by Camfil

March 2, 2026 · 21 min · Episode 58

About this episode

This episode discusses the optimal timing for HVAC filter changes and the importance of pressure drop over visual checks.

Relying on a fixed calendar schedule for HVAC filter changes could be actively draining your facility’s budget and increasing energy costs. This time-based approach often leads to filters being changed too early or too late, both of which are expensive mistakes. This episode reveals the crucial data point you should use—the optimal 'sweet spot' for replacement based on pressure drop—and explains why visually checking for dirt is dangerously subjective. We also demystify the MERV rating, focusing on the critical detail that truly protects occupants and equipment, not just the sticker price. Joining us is Jon Holmes, a specialist from Camfil. With over a decade of experience, Jon has spent years helping facility managers bridge the gap between complex engineering principles and practical, breathable air solutions. THINGS WE SPOKE ABOUT Goals of filter maintenance and replacement Optimal filter change is double pressure drop Visual dirt checks are subjective and unreliable Media, area, shape affects filter lifespan Why the MERV-A rating is crucial GUEST DETAILS Jon Holmes serves as a specialist at Camfil. He has spent over twelve years in the air filtration industry. His main skills…

People in this episode

Guest: Jon Holmes

Topics covered

  • HVAC filter changes
  • energy costs
  • MERV rating
  • filter maintenance
  • air quality

Keywords

  • HVAC
  • filter change
  • pressure drop
  • MERV rating
  • air filtration

Mentioned in this episode

Organizations: Camfil

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