A public hearing will be held in Bethel tonight about renovations to a Housing Authority complex.  Bethel installed new doors and energy-efficient windows at  Reynolds Ridge, with the help of an $800,000 grant.   Two units at the low- and- middle-income complex for seniors and the disabled were also converted to be handicap accessible.  Bethel is required to hold a public hearing to gather feedback on the project because the Housing and Urban Development Community Development Block Grant Program was tapped for the work.  The hearing is at 7pm at the municipal center.