Focused airflow in a two truck wide vivarium

A method of sterilizing animal cages comprising the steps of:

• (a) providing a sterilization system including an air intake and an air exhaust fluidly connected to a conditioning plenum;
• a heater arranged inside the conditioning plenum downstream from the air intake;
• a first sterilization chamber adjacent to a second sterilization chamber;
• a first pressure plenum adjacent to the first sterilization chamber and fluidly connected to the first sterilization chamber and the conditioning plenum;
• a second pressure plenum adjacent to the second sterilization chamber and fluidly connected to the second sterilization chamber and the conditioning plenum;
• a first return duct arranged between the first and second sterilization chambers and fluidly connected to the first sterilization chamber and the conditioning plenum;
• and a second return duct arranged between the first and second sterilization chambers and fluidly connected to the second sterilization chamber and the conditioning plenum;
• (b) placing animal cages to be sterilized in the first and second sterilization chambers;
• (c) directing heated air from the conditioning plenum to the first pressure plenum and from the first pressure plenum to the first sterilization chamber and from the first sterilization chamber through the first return duct;
• (d) directing heated air from the conditioning plenum to the second pressure plenum and from the second pressure plenum to the second sterilization chamber and from the second sterilization chamber through the second return duct;
• (e) returning the air from the first return duct to the conditioning plenum and
• (f) returning the air from the second return duct to the conditioning plenum.