1) Do not need electric force
2) Protection against high temperature, bad air environment
3) Anti-corrosion, anti-acids and bases, anti-oxidation
4) Long usage
Specially used in the machinery factory, paper factory, storerooms, and the big buildings which have much harmful air and the temperature is very high;TG-600. TG-500 are used in the general industries rooms and the small buildings; TG-300 are used in the advanced houses and the ventilating pipes.