The Zehnder Unity CV2.1APP & Greenwood Unity CV3 continuous extract fans from Zehnder Group have been designed to take on board the continued importance of reducing energy usage, regulatory compliance as well as contribution to well-being by eliminating nuisance noise. These fans uses capacitive touch technology for quick and easy set-up on-site - simply touch to set the speed required. Four airflow performance points are available to meet regulation room rates requirements easily for trickle