Akụkụ fan dị na AHU nwere fan inlet centrifugal okpukpu abụọ, moto na draịva V-belt nke etinyere na etiti dị n'ime nke a kwụsịrị site na mgbanye mgbochi ịma jijiji n'ime etiti mpụta nke enwere ike dọpụta ya.A na-etinye fan unit ahụ n'ime ụgbọ okporo ígwè abụọ transverse jikọtara na ikuku njikwa ikuku, a na-ejikọta oghere mgbapụta fan na ogwe mgbapụta nke unit ahụ site na njikọ na-agbanwe agbanwe.