BUY TO KNOW Q: How is the water flow from this machine? A: In contrast to conventional water dispensers, which take time to boil water, the S9013 instant hot water dispenser's internal heating system instantly heats the water as it is pumped up from the tank. Because of this, the S9013's water output will be smaller, customers please be careful it when placing orders. Q: Does this instant water heater have a filtration system? A: Please note that this instant hot water boiler does not have a filtration and purification system, so using purified water is necessary! Q: Will I be able to use it at high altitudes? A: If living above an altitude of 250m, it is recommended to conduct boiling point testing before use. Q: Why do I have water residue when I receive the BUYDEEM S9013? A: Since instant hot water dispensers are tested for water uptake after production, it is normal to have slight water stains in the tank or pipes when the package is received. Q: What can I do about hot water that smells like plastic? A: You can add lemonade to the tank in conjunction with the water dispenser cleaning function to reduce the plastic odor. It is made of materials that meet health certifications.