Uniform Mechanical Code 2012 edition includes the following areas: Uniform codes in the Plumbing, Mechanical, Solar Energy, and Pool, Spa, and Hot Tub and Green segments, study guides & training manuals, state codes, local codesUniform Mechanical Code includes the following topics: New provisions for Type I and Type II exhaust systems and product conveying ducts, new sizing conditions for duct systems, duct leakage testing requirements, requirements for pressure regulators and electric furnaces, refrigerant system requirements, such as A2L and B2L low flammability refrigerants and many more.