Paralouver recessed low-brightness troffer for most ceilings: Grid inverted T (NEMA “G”). Flange-type for concealed mechanical suspension (NEMA “F”). Modular and “Z” spline (NEMA “M/Z”). Air handling or combination models are available with optional factory installed snap-in air slot covers (ASC) or adjustable air pattern control blades (APC). Excellent visual comfort and inconspicuous appearance. Housing is multi-stage phosphate treated for maximum corrosion resistance and finish coat is high reflectance baked white enamel. Flat black finish inside perimeter reveal for “floating door” appearance. Supplied with one wireway cover (except when required by ballast configuration.) Two ballast covers (2WC) are available. Models utilizing 3 ballasts (including emergency ballast) will be supplied with a top mounted ballast box, which will increase the height of the luminaire. Standard wireway cover is designed to accommodate small can electronic ballasts. Specification of ballasts other than generic ballasts, specification of emergency ballast, or field installation of emergency ballast may require the use of a larger wireway cover. Deep wireway cover (DWC) accommodates 2-3/8 W x 1-1/2 H ballasts and may be specified when ordering. Factory installed access plate includes 7/8 hole, 7/8 knockout and grounding screw. T-bar grid clips (UL listed) built into fixture, no extra parts required. Designed for use with standard grid ceiling members, 1-1/2 maximum height. One-piece housing features integral end plates that increase rigidity and minimize damage from handling or shipping. Class P, HPF ballasts comply with Federal Ballast Law (Public Law 100-357,1988). UL listed for damp locations. Canadian certified optional. Self-contained fluorescent emergency power packs can be incorporated, UL listed for dry locations. Bodine or Day-Brite LP series emergency ballasts are recommended for use with the standard wireway cover. DEB series emergency ballasts may be used with the larger wireway cover.