The distiller heats tap water which is then vaporised into a steam before being condensed back to its original pure liquid state. This will extract all pollutants, inorganic chemicals . Easy and safe to use, simply plug in and start. Thermostatically controlled it will switch off at the end of each cycle. Makes 3.7-4 litres in 4 hours. 12 month warranty time. Frequently Asked Questions: A: Not a tight seal/leaks? Q: 1.Reset gasket of inner lid and ensure rim hasn't been stuck in three opening of cap and try to recover its shape; 2.Check the inner stainless steel tube, have it leaves a appropriate distance from the piece of stainless steel so that let steam scattered freely; A: It shuts off part way? Q: It may caused by thermostat, please email us then, we will address your such issue if you order under warrante time. A: Taste awful? Q: We suggest that you don't drinking it of the first working cycle. After a few working cycle, if it still tastes awful like plastic, please remove the gasket of cap and clean it. A: Fan stops working? Q: Please open it and reset fan motor or greased it. After above attempt, if it doesn't work, please email us, we will try our best to address your issue.