Because it uses less power and generates less heat, flat-panel display used in FM-approved OI requires less protection in hazardous areas. In Div 2 environments, it requires no purge, reducing installation costs and sparing more than 300,000 cu ft/yr in compressed air. In Div 1 environments, it requires only simple type Y purge, which costs substantially less than what CRT display requires. Standard screens measure 15.1 and 18.1 in.; custom sizes range from 10.4-20.1 in. Display-only version comes with 400 ft keyboard/video/mouse extender.