This Glazing Calculator has been developed to assist users with calculations required by the energy efficiency Deemed-to-Satisfy Provisions for BCA 2009, Volume Two. It assists in developing a better understanding of glazing efficiency parameters and, if used correctly, the ABCB believe it will produce accurate results. The calculator is provided "as is" and without any representation or warranty of any kind, including that it is fit for purpose or of merchantable quality, or function as intended or at all. Your use of the Glazing Calculator is entirely at your own risk and the ABCB accepts no liability of any kind. This calculator is compatible with Windows Excel 2003 or later. Not compatible with Excel for Mac.