Module 6 of 7 · about 5 minutes
How professional heat treatment works, how a home or room is prepared, and why follow-up checks matter.
Reviewed by the ThermoPest technical team · Last reviewed October 2026
Professional bed bug treatment usually means heating the affected rooms to a temperature that kills bed bugs and their eggs, with targeted spray where needed. The home or room must be prepared beforehand, and follow-up checks afterwards make sure the treatment has worked or show if a return visit is needed. Neighbouring rooms and homes should be checked too, or bed bugs can return from next door.
Specialist heaters raise the temperature of the room and its contents. Bed bugs and their eggs die when held above about 50°C for long enough, so technicians place temperature monitors in the coolest, hardest-to-reach spots to make sure every area gets hot enough. Heat reaches into mattresses, furniture and cracks that sprays can miss. ThermoPest’s treatment is heat-led, with targeted spray only where it’s needed.
Why the coolest spots matter
Bed bugs and their eggs die when held above about 50°C for long enough.
Heat gets into mattresses, furniture and cracks.
Preparation includes removing heat-sensitive items (medicines, aerosols, candles, plants), bagging excess clothing, stripping and hot-washing bedding, clearing access to beds and skirting boards, and removing all pets. Smoke and heat detectors need isolating during treatment, by the treatment team or your fire safety contact rather than the resident. Some residents need help to prepare. In hotels and hostels, housekeeping usually prepares the room with the treatment team.
People can go back in 2 hours after heat treatment, unless the technician advises otherwise. Any new bites or signs should be reported. A return visit is sometimes needed, which is why follow-up matters.
How a heat treatment works
Remove heat-sensitive items, bag clothing, clear access, remove pets.
Heaters raise the room and its contents to a temperature that kills bed bugs and eggs.
Sensors in the coolest, hardest-to-reach spots make sure every area gets hot enough.
Only where it’s needed.
After 2 hours, unless the technician advises otherwise.
Afterwards, any new bites or signs should be reported. A return visit is sometimes needed.
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