Commercial Hygiene Services has been a recognized name in the ductwork ventilation deep cleaning and maintenence industry for over thirty years. Commercial Hygiene Services specialises in deep cleaning of kitchen extract ductwork ventilation systems to remove the build up of grease that can be a fire hazard. Commercial Hygiene Services also carry out deep cleaning of fresh air supply and extract ductwork ventilation systems. A poorly maintained ventilation system can lead to sick building syndrome where your staff become ill due to the poor condition of the ductwork.