Since bed bugs are drawn to heat (it’s how they find their meal), they remain in the kill zone, guaranteeing complete annihilation in one trip. Bed bugs emerge from hiding instead of trying to escape and travel towards the heat source. Remaining bed bugs hiding inside anything will still be killed immediately as soon as the temperature reaches the kill zone.
Applying high heat is a more effective method to terminate a bed bug infestation in comparison to using chemical applications. Bed bugs are more resistant than ever to insecticides, meaning chemicals may not be able to kill all insect life stages resulting in remaining live bed bugs post-treatment. Whereas, bed bugs simply cannot survive at extreme temperatures making heat a better treatment option. Furthermore, only one heat treatment is necessary to eliminate an infestation, while chemicals usually require multiple treatments.
When it comes to high temperatures, more than 100 degrees Fahrenheit (37.778°C) starts to damage bed bugs, whereas 113°F (45°C) can kill bed bugs in 90 minutes and 118°F (47.778°C) can kill them in 20 minutes. As for the low temperatures, -13°F kills both adults and bed bug eggs in about several days. As you can see, the extreme temperature conditions can make a bed bug’s life a living hell, which is why professional exterminators use this method to completely eradicate bed bugs out of your house.