Expanding a Modular Clean Room can be easily accomplished by taking off a wall and adding another module. The prefabricated design allows the room to be expanded, relocated, or reconfigured into a different shape or made into multiple smaller rooms.
All air handling and filtration equipment modules are built into the modular room ceiling. Hook-ups for electrical and plumbing are engineered as part of the design.
The amount of time it takes to construct a Modular Clean Room is much less than constructing a permanent walled structure. It can take several months to construct a fixed wall clean room because of the amount of design, engineering, and the various trades involved. However, a fairly sophisticated modular room can be constructed in a week or two. On-site assembly of a modular clean room is also less disruptive to surrounding operations in comparison to their fixed wall counterparts.
There are two basic types of modular, solid wall clean rooms: recirculating and non-recirculating. Product and process requirements will determine which type of room is best suited for a company’s needs.
Recirculating clean rooms recirculate the air within the clean room and prevent it from mixing with the outside air, allowing for better control of the temperature and humidity. Air is recirculated back to the high efficiency particulate absorbing (HEPA) filters located in the clean room’s ceiling. This is accomplished by using air return chambers in the room’s walls or through existing walls of the building. The recirculating clean rooms will have less contamination loading on the HEPA filters because the system is recycling previously cleaned air. With less contamination loading, the filters will last longer and preform better.
Non-recirculating, sometimes called single pass rooms, draw in air from above the room into the ceiling HEPA filters. The filtered air is then blown into the clean room and exits through an approximate two-inch space located below the walls or through adjustable wall grills. Non-recirculating clean rooms are less costly to construct than recirculating rooms due to the lack of return air duct-work.
The modular clean room location within a building is very important. Physical space, temperature, humidity, and cleanliness will affect selection decisions and overall project cost.
Installation of a modular clean room is quick and easy. With modular systems, everything is prefabricated at the factory, so specialists are not needed to assemble the room, just local trades or internal people. It’s not uncommon to start a project on Monday and finish on Friday.