The Thermacell Mosquito Repellent system effectively repels mosquitoes, black flies, and other biting insects by creating a 15 x 15-foot zone of protection for bug-free comfort.

Do Thermacells kill bugs?

Does a Thermacell kill mosquitoes? No. It repels them. I've sat in pop-up ground blinds loaded with mosquitoes, and after firing up a Thermacell, you can watch the bugs fly out every opened shooting window.

What keeps black flies away?

Go for insect repellents with DEET; these will not only help deter black flies, but it will keep additional pests away too. Additionally, you can try scents that repel black flies such as lavender, vanilla, and pine. Again, these are guaranteed to keep black flies away, but they will help reduce the amount.