What Temperature Is Needed to Kill Bed Bugs?

The Lethal Temperature Range

Scientific research and field experience show that bed bugs die at sustained exposure above 50°C (122°F). To ensure eggs, nymphs, and adults are all eliminated, professional heat treatments typically operate in the range of 50–60°C (122–140°F).

• Adults and nymphs: usually die within minutes once core body temperature exceeds ~48–50°C.
  
  
• Eggs: more resistant, requiring longer exposure at 50–52°C, or faster kill at 55–60°C.
  
  
• Hidden harbourages: can take longer to reach lethal levels, which is why the hold time during treatment is critical.
  
  

Why “Time at Temperature” Matters

It’s not just about hitting the right temperature — it’s about holding it long enough to penetrate:

• Mattress and sofa cores.
  
  
• Cracks in wooden frames and skirting boards.
  
  
• Behind fixed headboards and inside socket voids.
  
  

That’s why our process includes a heat soak/hold phase, where rooms remain at 50–60°C for several hours. This ensures even the coldest points in the room, not just the air, reach lethal levels. See: ThermoPest Heat Treatment Process.

Why Heat Beats Chemicals

• Egg penetration: chemicals rarely kill eggs; heat denatures proteins inside them.
  
  
• Resistance-proof: bed bugs can develop insecticide resistance, but not resistance to physics.
  
  
• Coverage: heat moves through fabrics and voids where sprays cannot reach.
  
  
• Same-day results: unlike sprays, which may need weeks and repeat visits, heat works in one.
  
  

Explore more: How does bed bug heat treatment work?

Impact on Property Items

Most household items tolerate treatment temperatures of 50–60°C:

• Safe: mattresses, solid wood, carpets, books, plastics.
  
  
• Remove beforehand: candles, wax, cosmetics, aerosols, live plants.
  
  
• Special handling: electronics are usually fine when powered off; delicate instruments may need isolating.
  
  

Our technicians provide a full preparation guide before treatment so nothing is overlooked.