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25 May 2017 In order to promote the geoexchange industry by educating the public, IGSHPA produces brochures and booklets with full-color graphics that 18 Oct 2018 IGSHPA has led the way in providing a complete set of standards for GHP systems. This manual covers design and installation standards forANSI/CSA/IGSHPA C448 Series-16 Bi-National American–Canadian Standard. 4 Oct 2018 IGSHPA has designed a program to offer advanced training towards A minimum of 20 hours of instruction; CGD Books, IGSHPA manual set IGSHPA encourages the employment of accredited, experienced installers, designers, and contractors. The accredited installers and certified designer listed in