Does A Bed Bug Heat Treatment Work In A Cold House?
Yes. A heat treatment works in January the way it works in July, because the temperature that decides the outcome is the one deep inside a mattress seam or a headboard joint. Cold weather does not protect bed bugs and it does not cancel the appointment. What a cold house changes is the length of the warm-up and the location of the stubborn spots.
The question usually arrives with the weather attached. It is twenty degrees out, the furnace has been running all week, can this really be done now? It can, and the reasons are worth knowing before you schedule anything, because a few of them change what you are asked to do on the day.
Winter Does Not Do Any Of This Work For You
Start with the hope everybody has in December, that a cold snap might handle the problem. Bed bugs are not freeze tolerant, which sounds encouraging until you read the thresholds. In the cold tolerance study by Olson and colleagues in the Journal of Economic Entomology, reported by the Entomological Society of America, killing every life stage took a minimum of 80 hours at minus 16 degrees Celsius, roughly 3 degrees Fahrenheit. Eggs came through brief exposures that were colder than that.
Three degrees, held without a break for more than three days, is not an Ohio winter night and it is nowhere near the inside of a house. Bed bugs live within a few feet of where somebody sleeps, which from October to April means a heated bedroom. The season they care about is the one your thermostat sets. Plenty of other pests stay active through an Ohio winter for the same reason.
How Much Heat Does It Take, And For How Long?
More than a furnace delivers, and held for longer than most people picture. Pereira and colleagues, writing in the Journal of Economic Entomology in 2009, found that adult bed bugs exposed to 39 degrees Celsius, about 102 degrees Fahrenheit, for four straight hours showed no mortality at all. A hot house is not a treatment. Here is where the published numbers actually sit.
| Temperature | What the research found | Source |
|---|---|---|
| 102 F (39 C), four hours | No adult mortality | Pereira et al., 2009 |
| 113 F (45 C) | 99 percent of adults dead at about 95 minutes, while eggs survived 7 hours | Kells and Goblirsch, 2011 |
| 118 F (48 C) | Eggs finished in about 72 minutes | Kells and Goblirsch, 2011 |
| 119 F (48.3 C) | Lethal temperature for 99 percent of adults | Kells and Goblirsch, 2011 |
| 131 F (54.8 C) | Lethal temperature for 99 percent of eggs | Kells and Goblirsch, 2011 |
| 131 to 149 F (55 to 65 C) | Air temperature commercial whole room heat treatments work in | Kells and Goblirsch, 2011 |
| 3 F (minus 16 C), 80 hours | What cold has to do to match it | Olson et al., 2013 |
The eggs are the reason professional equipment exists. Kells and Goblirsch, publishing their University of Minnesota work in the journal Insects, put the lethal temperature for 99 percent of adults at 48.3 degrees Celsius and for eggs at 54.8 degrees Celsius, and they note that the heat a bug actually experiences depends on the material it is buried in. Air in the room is not the same as air inside a box spring.
What A Cold House Changes About The Day
Mostly it changes the warm-up and the map of cold spots. ThermaLock™ heat treatment has to replace heat the building is losing the whole time it runs, and in February a house loses it through every exterior wall, window and door it owns. A bedroom with two outside walls lags behind an interior one. That lag is time, not failure, as long as somebody is watching the right places.
Those right places are the problem worth taking seriously. Research presented at the International Conference on Urban Pests on heat treatments in occupied apartments found that cold spots were the greatest challenge to treatment success: bugs survived in pockets that never reached a lethal temperature, and not every one of those pockets had been identified before the heaters came on. Heat that averages out fine across a room can still leave a seam behind.
In an Ohio winter the candidates are easy to guess. The floor along an exterior wall. The back of a headboard pressed against cold plaster. A closet on the north side of the house, an unheated end room, the base of a patio door, the corner where an addition meets the original structure. That is where air movers and temperature probes belong, and the clock on the job starts when the coldest reading gets where it needs to be, not when the air in the middle of the room does.
The Preparation Wrinkle Nobody Mentions Until February
Certain things leave the house before a heat job, and in summer most of them sit in a car or a garage for the day. Winter takes that option away, so the planning conversation changes a little. Worth sorting out before the morning of:
- Pets, fish tanks and reptiles need somewhere warm for the day, which a parked car in a driveway is not.
- Houseplants that go out a door in January do not come back in the same condition they left.
- Medication and anything labeled room temperature is as wrong in a freezing garage as it is in a heated room.
- Liquids that can freeze and split want a heated spot somewhere else, not the back porch.
- Nothing from the infested room should take shelter in a clean part of the house. That is the move that turns one room into two.
The office walks through the full list with you before anything is scheduled, and our guide to preparing a home for a bed bug heat treatment covers what leaves and what stays in ordinary weather.
Is Winter A Bad Time To Deal With This?
No. Nothing about heat waits for spring. It kills every life stage including eggs, it is typically finished in a single day, and it leaves no chemical residue behind, which matters in a house with small kids or somebody who reacts to products. Once the equipment is out, the house cools back to whatever your thermostat says and the room is a room again.
The calendar argues for sooner rather than later anyway. Late November through New Year is when spare bedrooms get used, luggage comes home and furniture gets handed around, which is why we wrote about guest rooms and bed bugs over the holidays. A problem found in December does not politely hold still until April. If heat is not practical for a particular property, the bed bug treatment page explains the bio-chemical option that follows an inspection.
Getting It Looked At In Stark Or Summit County
If you have found dark spotting on a seam, a shed skin in a frame joint or a bug you cannot place, the next step is confirmation rather than a space heater and a long weekend. The inspection fee is waived when you go with us for treatment. Schedule an inspection or call 330-494-6199, and tell the office what you found and which room it was in. Renters and landlords in Summit County can start from the Akron bed bug heat treatment page, which covers how access gets coordinated in an apartment.
Frequently Asked Questions
Does a cold house make a bed bug heat treatment take longer?
It can stretch the warm-up, because the equipment is replacing heat the building loses through exterior walls and windows the whole time it runs. The target does not change. The job is judged by the coldest reading in the room, not by the clock or the air in the middle.
How cold does a freezer have to be to kill bed bugs in small items?
Colder and for longer than most people assume. The cold tolerance research by Olson and colleagues found that 100 percent mortality across all life stages took at least 80 hours at minus 16 degrees Celsius, about 3 degrees Fahrenheit, and eggs survived brief exposures below that. Bag items before they go in, and check that the freezer actually holds that temperature.
Will cold weather push bed bugs deeper into the walls?
They do not migrate with the season. Bed bugs stay close to where a person sleeps year round, because that is where the blood meal is. What winter changes is the number of cold pockets in a room, which is why a treatment is run against readings taken in the coldest places rather than an average.
Does anything need to run in the house after a winter heat treatment?
No. Heat leaves no chemical residue to air out and no temperature to maintain afterward. The house returns to its normal setting as it cools, and the room goes back into use once the crew confirms the treatment is finished.
