Zip Hydro Tpa Chrome Zip Heaters, the world leader for boiling water, introduced the Zip HydroTap into the UK market in 2005. Since that time it has changed the way that people have boiled water. Whichever model is chosen you can be quite certain of one thing nobody offers a more advanced boiling and chilled water system for your home than Zip. HydroTap is available in boiling and chilled, boiling and ambient, boiling only and chilled only. Cost will vary according to to the power supplier and your usage. Assuming a cost of 10p per KW and with sleep mode operating 10 hours in 24, estimated energy cost is less than 10p per day. The estimated cost for heating and chilling water dispensed is: Boiling water = eight 167ml cups for 1p (That’s 800 cups for £1) Chilled water = twenty 200ml glasses for 1p (That’s 2,000 glasses for £1) For boiling water only model please see below