Depending on the type and how it is used, instant hot water dispensers can be energy efficient. Here are a few things that can change how much energy a quick hot water dispenser uses: Insulation: How well the dispenser is insulated can have a big effect on how much energy it uses. A dispenser with good insulation will keep the water hot for longer, so the heating element won't have to work as hard to keep the water at the right temperature. Heating element: The energy efficiency of the dispenser can also be affected by the type and quality of the heating element. A good heating element can heat the water quickly and efficiently, while a bad one may take longer and use more energy to do the same thing. A hot water dispenser's energy efficiency can also be affected by how often and for how long it is used. If you use the dispenser often and for long periods of time, it will use more energy than if you use it less often and for shorter amounts of time. Temperature setting: The way the dispenser is set up for temperature can also affect how much energy it uses. If you set the temperature higher, it will take more energy to keep the water hot. If you set the temperature lower, it will take less energy. Overall, instant hot water dispensers can save energy if they are made and used with energy efficiency in mind. It's important to carefully read the manufacturer's instructions and follow energy-saving best practices, like turning off the dispenser when it's not in use and changing the temperature settings as needed.