How a Therma Cell works

Therma cell has an insecticide impregnated pad that is inserted over a metal surface which is then heated by butane element. It is a heat generated source that drives the isnecticide from the pad into the surrounding air. It is godd for a 15 sq ft area but as you can guess wind does play a factor on how it works. So use the wind to your advantage. I attach a nylon cord to the back grate of the unit in a large loop so I can hang on trees.

The insecticide pads are light blue in color and will turn smokey white when used up. You can get more life out of each pad if you take it out and seal tightly in aluminum foil.

As with any type of insecticide READ THE PRODUCT LABEL AND ALL WARNINGS!!

The OFF! device is battery operated - does not require heat - has a pad like insert - I tested prototypes and need to go buy a real one to see how the pad works.

Both do work.