About ALX-UD Series: DIRECT DRIVE UPBLAST SPUN ALUMINUM EXHAUSTERS (Rated Restaurant) FEATURES Spun aluminum housing will not rust, chip gold peel. Non-overloading backward inclined wheels, blades and inlays fabricated from 3003-H14 aluminum. Can be used for roof or wall mount applications (all units). Variable speed PSC motors available on ALX 105/120/135 All motors are 1 Phase 120 / 240V operation and can be operated at 50 or 60 Hz. Quick release latches for easy motor access. Optional grease collection box. ETL listed for compliance with UL 705 & UL 762 standards. $ 999 + gst