Loren Cook Gemini fans provide maximum performance, durability, and ease of installation in a wide variety of ceiling and inline clean air exhaust applications.Gemini fans are easily field convertible from ceiling to inline or inline to ceiling depending on the installation needs. All units are tested in Cook’s AMCA registered laboratory in accordance with AMCA Standards and are licensed to bear the AMCA Certified Ratings Seal. All Gemini units are listed by Underwriters Laboratory (UL 705) and UL listed for Canada (cUL 705).