Heating a bed bug or bed bug egg to 122 degrees for less than 60 seconds will kill them. However, reputable bed bug exterminators that use heat will routinely keep the home heated to between 140
Bed bugs can be difficult to get rid of, but one proven method to kill bed bugs is heat. If you can get your home and infested items hot enough, all stages (eggs, nymphs, and adults) will be killed. The exact temperature needed is debated, but most estimates are in the range of 117-122 degrees Fahrenheit.
HOT BOX. Heat penetrates into small crevices that cannot be inspected. Lethal temperatures for bed bugs range from 117 degrees Fahrenheit to 122 F. The walls of hot boxes reach a higher temperature than the suggested lethal range in order to permeate belongings placed within, killing all bed bugs in all their stages.
Equipment. The specialized equipment used to treat bed bugs by heating an entire room above 120 degrees Fahrenheit costs thousands of dollars, which is one reason this method is expensive for customers, too—starting at $1,500 and going as high as $4,000 or more depending on the number of rooms and total square footage.
However, they will die within 20 minutes if exposed to 118°F. Interestingly, bed bug eggs must be exposed to 118°F for 90 minutes to reach 100% mortality. Note that whole room heat treatments (see below) are based on a thermal death point of 113°F, yet these treatments have been very successful.
Assuming your dryer gets up to around 170 degrees (you can test this with a thermometer) that should be ample time and temp to kill any bed bugs as long as the dryer isn't stuffed. Of course you can always double-check the temp of the clothes with an instant-read thermometer.