Abstract: A modular clean room structure in which the interior is finished without any seams between adjacent modules or crevices at the corners of the room such that the room can be easily sterilized. The seamless nature of the interior surface of the clean room eliminates locations where moisture can accumulate and promote bacteria growth. A cove is used to finish the corners of the room with a larger radius curve blending smoothly into adjacent flat surfaces. A durable coating is applied continuously over the ceiling, side walls and floor of the clean room to provide a seamless interior surface.

Abstract: A modular clean room load bearing structure having a negative air pressure plenum above the clean room ceiling to prevent the collection of dust and dirt above the ceiling. The vertical sidewall of the clean room is constructed of individual wall modules which are assembled together on site to construct the clean room. Each wall module serves as a return air duct for circulating air from the clean room upwardly through the wall module to the negative pressure plenum where the air is drawn out to a HVAC unit for conditioning the air. The conditioned air is returned to the clean room through a supply air duct system which includes HEPA filters in the clean room ceiling which filter the air immediately prior to the air being blown into the clean room. A support deck spans across the top of the sidewall and is formed by four foot wide structural panels spanning across the clean room. The deck supports the HVAC equipment above the deck while the clean room ceiling and HEPA filters are suspended from the deck.