Less electricity per litre of hot water
The heat pump moves heat rather than creating it, so it uses considerably less electricity per litre than an immersion element.
All energy measures
Heating and hot water
Heat pump water heater
A heat pump water heater has a small heat pump built into the tank. It draws heat from the surrounding air instead of producing all the heat with electricity.
See what this means for your homeThis measure is relevant if
- The tank stands in a basement, utility room or store
- The room has enough air volume, or can be ducted
- The tank is due for replacement anyway
- You have no waterborne heating and will not install it
What it does to energy use
It cools the room it stands in
The heat it collects comes from the room air. In a heated basement part of the gain is eaten up by having to warm that room again.
It dehumidifies
The same process draws moisture out of the air. In a damp basement that is a benefit, not a side effect.
It needs space and air
The unit is taller than an ordinary tank and needs a certain air volume, or a duct to outdoor air, to perform as promised.
Sequence matters
The tank can be replaced independently of the other measures, which makes it a good place to start. One caveat: if you later install an air-to-water or ground-source heat pump, it can cover the hot water, and the tank becomes an investment you make twice.
Enova funding
Heat pump water heaters are among the measures Enova has funded. The terms have set requirements for the unit'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.