Yes, only Distilled Water [>0 TDS] is acceptable for use to avoid damage and/or voiding the 1yr Warranty

No, as heat deteriorates the Molecular Hydrogen molecules.

A 12-month Limited Warranty will be honoured from the date of delivery, provided the following guidelines are adhered to Ensure only High-quality Distilled Water [>0 TDS] is used in your Machine DO NOT attempt to Disassemble, Repair or Modify your Machine DO NOT place your fingers or other foreign objects into the Water Tank as [...]

Yes, Hydrogen-Infused Water may be re-infused.

Hydrogen-infused Water can retain its molecules for several hours if sealed in a glass, airtight vessel to the brim.

For adult females, we recommend starting with one-hour with half-an-hourly increments of Molecular Hydrogen every few days; while adult males usually begin with two-hours & hourly increments. Some adults love to sleep with the nasal cannula in overnight! For children 3-10 years old start with 30 minutes at a time; while 15 minutes is usually [...]

The recommended daily water intake is between one and three litres. We recommend that you drink only hydrogen water, although anything more than one glass a day will be highly beneficial for regulating your oxidation level.