This was at a Hospice facility, the duct in the mechanical room which was layed out and drawn by me. There are a few of a kitchen hood I installed, and the duct work is stainless welded by a welder not me, Then the last 3 photos are of a ductboard job at a previous employers personal residence that I was chosen to run. Some pictures are shown in sheet metal only and others were the same duct but insulated with 1 inch and a half ductboard for insulation and sound purposes. You will notice in a few pictures that a black canvas on top of the equipment is installed, a good flex connection keeps unit from any vibration which the unit may incur upon switching on and off or while running, This particular mechanical room was 30 feet from top[ of unit to penetration thru wall hung with 1 inch straps sealed with mastic and insulated and seams of insulation sealed, this was about a $100,000.00+ dollar job
