The EVO Cat Tower is an excellent structure for felines who like to climb and keep an eye on their surroundings. It is important to note that although the height can be adjusted by +/- 4", the tower has been designed for 8' ceilings only. The tower cannot be installed in a room with a 9' ceiling. The tower can be fixed to the ceiling by pressure or by screwing in. If your cat is very active and/or large in size, it is strongly recommended to screw the tower to the ceiling following the instructions available in the manual.
Find all the necessary information here.