Sunvent SV-212S Solar Ventilation Fan for Roof, Attic, RV, Boat, Greenhouse - Stainless Steel,Solatron" /> The Sunvent SV-212S provides continuous ventilation whenever there is sunshine. No batteries, wiring, plugs, or noise. The Sunvent extracts 680 cubic feet of air per hour. Very easy to mount and requires a 4.75" diameter installation hole. Constructed of durable stainless steel. Dimensions: 8.5" x 8.5" x 3.0"