Not too happy with you using autism to call someone dumb, but I'll leave this up assuming it was just a one-off.
Definition of sash for Students. 1  1 : a frame for a pane of glass in a door or window. 2  2 : the movable part of a window.
The Single-family Affordable Solar Housing (SASH) Program provides incentives to qualified low-income homeowners to help offset the costs of a solar electric system. The SASH program is overseen by the California Public Utilities Commission (CPUC) and administered by GRID Alternatives, a non-profit organization.