#1.8 Thermal Disinfection & Chemical Injection: What is the Right Mix for your System Update?

#1.8 Thermal Disinfection & Chemical Injection: What is the Right Mix for your System Update?

From Ask Caleffi by Caleffi North America, Inc.

May 15, 2026 · 22 min

About this episode

This episode explores the conditions that lead to Legionnaires’ disease and discusses methods for thermal disinfection and chemical injection in plumbing systems.

Legionella isn’t a “rare edge case” problem—it’s a predictable outcome of physics and biology. When water sits warm and stagnant, it becomes an incubator for bacteria that grows in the biofilm of the piping. In this episode, we step inside the lab to demystify Legionnaires’ disease and the plumbing conditions that allow it to thrive. From the mechanics of aerosolization in showers and misters to the high-stakes environments of hospitals and hotels, we’re breaking down the "why" and "how" of w...

Topics covered

  • Legionella
  • thermal disinfection
  • chemical injection
  • plumbing conditions
  • biofilm
  • aerosolization

Keywords

  • Legionella
  • thermal disinfection
  • chemical injection
  • biofilm
  • plumbing
  • aerosolization
  • Legionnaires’ disease

Mentioned in this episode

Organizations: Caleffi North America, Inc.

Places: hospitals, hotels

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