The bi-fold system is bottom rolling with an in-frame track for optimum panel support. Rated to 2.7m high in ExtraHigh wind zones. For higher doors consider using APL Architectural Series ThermalHeart+®. The bi-fold window system uses the bi-fold door system with a smaller stile and top and bottom panel rail.

For best overall performance, pair with The AGP System® with Solux-E® or Solux Ultra® low-e glass.