For the most current mechanical codes that address the design and installation of the most current mechanical systems, use the 2012 INTERNATIONAL MECHANICAL CODE LOOSE-LEAF VERSION. Designed to provide comprehensive regulations for mechanical systems and equipment, it includes coverage of HVAC, exhaust systems, chimneys and vents, ducts, appliances, boilers, water heaters, refrigerators, hydronic piping, and solar systems. This valuable reference uses prescriptive- and performance- related provisions to establish minimum regulations for a variety of systems. This Loose Leaf version gives users the ability to easily remove pages of the code from the three-ring binder for ease of reading. Check out our app, DEWALT Mobile Pro . This free app is a construction calculator with integrated reference materials and access to hundreds of additional calculations as add-ons. To learn more, visit dewalt.com/mobilepro."