Either the whole house or a single area may be heated to 150 degrees and more.

There is little scientific data on freezing and heating methods and both have drawbacks. Heating or thermagation is a non-chemical possibility but it can damage furniture, cosmetics, computers, tapes, CDs, foods, and any object that cannot withstand 140 to 150 degrees Fahrenheit; all must be removed from the premises and the price often is higher than fumigation.

Freezing uses liquid nitrogen to kill termites. It has proven to be an excellent non-toxic remedy in localized situations, but it is not particularly recommended for large areas.

Holes are drilled into the walls and liquid nitrogen under pressure is applied through the holes. Termites are 90 percent water and the nitrogen freezes them and they burst.