Designing and specifying a mechanical system requires consideration of many variables. This design guide put out by the National Mechanical Insulation Committe (NMIC), provides a great foundation of aspects to consider. Identifying the objective of the mechanical system in the begining of your design phase will help to direct the project as it continues. Condensation control, energy conservation, fire safety, and noise control are just a few objectives that can help you determine when and what to insulate. Once these have been identified you must consider other design issues like Corrosion Under Insulation, Maintainability, and Service life. This design guide will help to walk you through all of these considerations. It is a great refresher for the experienced and a simple foundation for the greenhorn.