Some industries deal with products that have to be developed in a clean room environment. This applies to companies that deal with biotechnology, pharmaceuticals and even microelectronics. These industries often require specialized equipment, such as a pharmaceutical grade refrigerator for the development of drugs, or a specialized HVAC system. When investing in a clean room design, keep in mind that you want to work with someone who has experience with products similar to yours. The slightest change in temperature, or air pressure, could ruin the development of product, which can be avoided with the proper clean room design.