Designed to suit most ceiling concealed installations. Height less than 230mm. Quiet and efficiency 3-speed centrifugal fan-motor makes its running in low noise and high efficient. Our fan is made by international professional fan manufacture with stable quality and reliable character with routine dynamic balance precise debug. Fan runs stably and quietly. High efficency. Adopt good quality heat exchanger and fan , heat exchanging capacity and efficiency. Symmetric-design allows it the change the outlet pipe in left or right side according to actual installation. 2 pipes & 4 pipes systems in all range. 2-way and 3-way valve kits are optional for 2-pipe system and 4-pipe system.