Home / Extract Fans & Accessories / Accessories / Faith Window Kit Faith Window Kit £29.40 Window kit to be purchased for the installation of our Faith Extract unit. Faith Window Kit quantity Add to basket SKU: FAITH-WKIT Categories: Accessories, Extract Fans & Accessories Tags: Ancillaries, Installation kit Product ID: 10259 Description Description The window kit allows the occupant to install the Faith extract unit through a window.