Useful Website Links for Facilities Maintenance ProfessionalsGoogleSearch the internet for information and products.WikipediaThe free encyclopedia that anyone can edit.AmazonBooks, movies, music and everything else you need.US Department of LaborInformation on demand for facilities maintenance personnel and HVAC technicians.US Green Building CouncilInformation on sustainability, energy efficiency, and LEED credentialing for facilities professionals.US Environmental Protection Agency – Section 608Information on CFC Licensing and requirements for replacement refrigerants and disposal.