Homeowners looking to install instant hot water heater to their kitchen sinks have been given some advice by an expert.Ed Del Grande, author and renovator, explained that the heaters can be easily fitted and installed to a standard kitchen sink.All that is usually required for installation is a GFCI electrical outlet in the cabinet, a cold-water supply and an open faucet hole in the sink or countertop to mount the dedicated tap, he added.The small, powerful, point-of-use electric units are designed to provide individuals with boiling water straight from the kitchen tap.A thermally-insulated water tank with powerful electrical elements keeps near-boiling water available for use at all times.You can also make other great treats besides tea like hot chocolate, soups, oatmeal and many more piping-hot favourites, Mr Del Grande explains.Basically, anything that you can make by adding boiling water can work well with an instant-hot unit installed at the kitchen sink.