Abstract: A fogger array, permanent wash down filters, and a digital controller for use in a heating, ventilating and air conditioning system having sensors and controls, the heating, ventilating and air conditioning system having a return air and a supply air plenum, the return air plenum is baffled to the outside, an outside air source with baffles, a mixed air plenum, the mixed air plenum connected by baffles to the outside air source and the return air plenum, characterized by the fogger array located in the mixed air plenum, the permanent wash down filters located in the supply air plenum proximate the mixed air plenum, the permanent wash down filters located in the supply air plenum proximate the fogger array, the digital controller controlling the sensors and controls to the heating, ventilating and air conditioning system and fogger array.