TopTherm fan-and-filter units Article number: SK 3243.110 Complete fan unit for tool-free mounting on surfaces. Air throughput from 20 - 900 m³/h, standard protection category IP 54. www.rittal.com/com-en/products/PG20231215KLI101/PG20231215KLI102/PG20240718KLI001/PRO0299?variantId=3243110