Extraction Clean UK offer the innovative Jetvent cleaning method for the cleaning of supply and extract air conditioning ducting. The Jetvent system utilises negative pressure on the system and all the dirt, dust and micro-organisms are vacuumed away into a HEPA filtered industrial vacuum. For all stubborn dirt and dust, a compressed air nozzle is inserted into the ducting via an access hole. This agitates both circular and rectangular ducting and the negative pressure vacuum removes the disturbed dirt.