Maclay Architects, Waitsfield, Vt., received top honors in Vermont’s 2010 Better Buildings by Design Conference for the net-zero-energy design of a new $5.1 million fieldhouse at the Putney School, a college preparatory boarding school in southern Vermont. The 16,800-sf structure will produce as much energy as it uses over the course of a year thanks to an on-site solar photovoltaic system. The super-insulated building envelope reduces energy use to more than half that allowed by state standards.