The Master Flow 14 in. x 8 in. x 8 in. Universal Register Box with Flange can be installed before dry walling. It creates a straight (in-line) transition from round pipe or insulated flexible duct to an air register or grille. The built-in flange provides space for easy joist attachment to help create a secure installation.
Creates a straight (in-line) transition from 8 in. round pipe or insulated flexible duct to a 14 in. x 8 in. air register or grille
Built-in flange provides an area for register screws， Sheetrock frame or joist attachment for an easy installation before drywalling
Always seal seams with code-approved mastic， sealant or duct tape (not included)
Always insulate ductwork for greater system efficiency and comfort (insulation not included)
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