Terminal sterilizer

Hello frndz.

Just i need the answer of my que. that is, why terminal sterilizer need 15 min. for sterilization, why not, 30 min. coz for autoclave validation it need 121 temp for 30 min. as per guideline,…is this 15 min given in any guideline?..plz reply soon my frnds…

Thank u…

Rajendra Pagdal