We’ve had our Qettle instant boiling tap for about a year now. It has not only reduced our electricity bill, but has added a whole new level of kitchen-convenience!
It is the most reasonably-priced boiling water tap that has fully-filtered cold and 100C boiling water on one side, as well as regular hot/cold water on the other side. No more kettle electricity surges, no more water filter jugs, and no more waiting for water to boil for cooking on the hob.
We use it a lot as we work from home, but we have only had to change the filter once during our one year of use.
Very impressed: another recommended hack for your life (assuming you use a kettle regularly).