The Hi'ilani EcoHouse uses two window systems. Western Windows is the manufacturer of the large sliding doors and windows facing the Pacific Ocean, and all of the view windows.

The ventilation louvre windows are supplied by Breezway. Both companies provided windows with a highly protective aluminium finish.

The large sliding doors, some over 12 ft high, operate smoothly with the new Western Window ball bearing roller system.

All Western Window window and door assemblies were installed by California Building Specialties, a window system contractor with extensive experience with installations in SCIP buildings.