LEED products Green Products
The building envelope is weakened by the windows.   Why replace glass with glass?   heat travels from hot to cld.  Glass will attract the warm air to the cold glass.   The room air will cool off quickly and the thermostat calls for heat.    The answer is to insulate the glass.  Our SEE THRU passive solar window insulation comes in vertical blinds, roller shades or panels.  The fabric is a plastic, see thru and is reversible in summer.    Call Ginetta 810-240-2116 or email her at solar.window.insulators@gmail.com    Start with your worst window.