What temperature kills bed bugs instantly?

Bed bugs and their eggs die almost immediately at 122°F (50°C). At lower temperatures they still die, but exposure has to last longer: about 90 minutes at 118°F for eggs and adults.

What temperature kills bed bug eggs?

Bed bug eggs die at 118°F (48°C) when that temperature is held for about 90 minutes, and within minutes at 122°F (50°C). Eggs are the most heat tolerant stage, which is why professionals hold rooms at 135°F or higher.

How long does a heat treatment need to run?

Plan on a full day. A room takes two to three hours to climb past 135°F, then the temperature is held for four to six hours so heat soaks into mattresses, furniture, and wall voids. Wireless sensors in the coldest spots tell you when every corner has stayed lethal.

Does a clothes dryer kill bed bugs?

Yes. Thirty minutes on high heat kills bed bugs and eggs in clothing and bedding. Washing alone does not reliably kill them, so the dryer step is the one that matters.

Does cold kill bed bugs?

Yes, but slowly. Items must be held at 0°F (-18°C) for at least four days. A household freezer works for small items, but a Tennessee winter is not cold enough long enough to treat a room.

Can heat damage my belongings?

Heat treatment runs between 120°F and 145°F, which is safe for wood furniture, mattresses, fabric, and most plastics. Remove candles, aerosols, medications, cosmetics, vinyl records, and anything else you would not leave in a hot car.

What Temperature Kills Bed Bugs? Exact Numbers for Adults, Nymphs, and Eggs

What temperature kills bed bugs?

Bed bugs die at 122°F (50°C) almost instantly, and every life stage including eggs dies at 118°F (48°C) held for about 90 minutes. Adults begin dying at 113°F (45°C) with longer exposure. That is why professional heat treatments raise a room to 135°F to 145°F and hold it for hours, so the coldest spot behind the headboard still passes the lethal line.

Updated September 22, 2026 · Bug Heat Pros, Knoxville, TN

Lethal temperatures by life stage

Temperature	Effect on bed bugs	Exposure needed
113°F / 45°C	Adults and nymphs die	About 90 minutes
118°F / 48°C	All stages die, including eggs	About 90 minutes
122°F / 50°C	All stages die	Within minutes
135°F to 145°F	Professional target room temperature	Held 4 to 6 hours so cold spots reach 122°F
0°F / -18°C	All stages die (cold)	4 days minimum

These thresholds come from university entomology research and EPA guidance and are the basis for every professional heat treatment. Bed bugs cannot build resistance to heat the way they have to pyrethroid insecticides.

Why the room has to get hotter than 122°F

The air near the heater hits 122°F quickly. The inside of a mattress, the back of a dresser against an exterior wall, and the gap behind a baseboard do not. Those cold spots are exactly where bed bugs hide. Raising the whole room to 135°F or more and circulating the air with high velocity fans is how you push the coldest spot past the lethal line. Wireless sensors placed in those spots are how you prove it happened.

How long it takes

Ramp up: 2 to 3 hours. Electric heaters and air movers bring the room from 70°F to 135°F.
Hold: 4 to 6 hours. Every sensor must stay above 122°F. The longer the hold, the deeper the heat soaks.
Cool down: 1 hour. Shut off, open the door, vacuum the dead bugs.

Other ways to use heat on bed bugs

Clothes dryer. 30 minutes on high kills bugs and eggs in clothing, bedding, and stuffed animals.
Steam. A steamer at 212°F kills on contact along mattress seams and furniture joints, but only where the steam touches.
Portable heat chambers. Good for luggage and small items, not rooms.
A hot car. Unreliable. Interior temperatures vary too much to trust for anything but bagged items on a hot day.

Kill the whole room in one day

Bug Heat Pros rents the same commercial heaters, air movers, and wireless sensors the professionals use, delivered in Knoxville and surrounding counties from $399 per day. See how a treatment day works or read the prep checklist.