ASHI Washington Presents Douglas Hansen: #H210057_Gas Appliance Venting_2hrs| 2CEUs Fee: $50.00 | Via Zoom Course Complete Douglas Hansen is the principal author of the Code Check series of field guides to building codes and Electrical Inspection of Existing Dwellings. He began working with Code Check-in 1998 when founder Redwood Kardon asked him to assist in editing the first edition of Code Check Electrical.
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