A heat pump water heater draws heat from the air
A tank with an integrated heat pump uses less electricity per litre of hot water than a plain immersion element.
All energy measures
Heating and hot water
Water heater and smart control
Heating tap water is one of the few items that is nearly as large in summer as in winter. Both the heater itself and how it is controlled decide what it costs.
See what this means for your homeThis measure is relevant if
- The water heater is more than fifteen years old
- You are on hourly electricity pricing but heat the water regardless of the hour
- The household has steady, high hot water use
- You are considering solar panels and want something to use the output on
What it does to energy use
Control shifts consumption in time
Smart control heats the water when electricity is cheapest. It cuts the cost without cutting the use.
The capacity element of the grid tariff
Part of the grid tariff is based on your highest-use hours. Keeping the heater off when other large loads run shows up on the bill.
The tank loses heat around the clock
An old heater gives off heat to the room continuously. The insulation standard of the tank is part of the sum.
Sequence matters
The heater and its control can be done at any time — they do not depend on the other measures, which makes them a good place to start. One exception: if you are installing an air-to-water heat pump, it can cover the hot water, and the heater should then be assessed as part of that system rather than as a separate measure.
Enova funding
Smart water heaters and heat pump water heaters are among the measures Enova has funded. The terms have set requirements for both the control and the system's performance.
Rates and terms change. What you can receive depends on the building, how the work is carried out and which schemes apply at the time. Always check Enova's own pages before relying on a figure.
The rates tell you what you can receive. The calculation tells you what the measure actually does to your home — how much it saves, what it costs, and whether it should come before or after the others.
Which measures pay off in your home?
Enter the address. Gadder collects what is known about the building, calculates the energy demand and ranks the measures by what they actually deliver.