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Backward-Inclined and Airfoil Wheels • Single-Width
content.greenheck.combut built to withstand operation seen in emergency smoke situations. Greenheck models USF-300, USF-400, and CSW are available with the UL/cUL Power Ventilators for Smoke Control Systems. Listing indicates the model is designed and tested to exhaust heat and smoke in an emergency situation. Models: USF-300, USF-400, CSW