HydroNova Hot Water System
FROM £2,499.00
HydroNova Hot Water System
FROM £2,499.00
The Herschel HydroNova is a compact, tankless hot water system delivering mains-pressure hot water on demand using advanced phase change technology. Paired with Sunamp’s Thermino© hot water battery, HydroNova charges using off-peak or solar electricity, offering high efficiency and reduced space requirements—less than a third of a traditional cylinder. Maintenance-free and solar-ready, HydroNova eliminates standby heat loss, providing consistent, energy-efficient hot water on demand. 10-year warranty included.
- Revolutionary Eco Heat Technology
- Power with cheaper off-peak electricity
- On demand mains pressure hot water
- No Tank - saves space
- Solar Ready
Find Out More
HydroNova is controlled with Herschel’s HN1 switch. This switch works with SmartLife and you can therefore set it to run on a schedule (e.g. overnight to use Economy 7) and can opt to add a mid-day top-up charge if you need to.
By Using the HN1 switch, you can integrate management of your hot water into your whole house heating solution on SmartLife.
HN1 comes with your HydroNova purchase, as standard. If you plan to use solar PV upon install, a solar PV ready accessory (the Optimino key) will be sent out instead of the HN1 smart switch. The Optimino key is also available to buy as an accessory if solar is planned at a future date.
Everything you need to install your HydroNova system comes with the package.
This includes:
- Expansion Tank
- Mixer Unit
- Herschel Smart Switch (HN1). The HydroNova comes with a Herschel Smart Switch, as standard. The Herschel Smart Switch cannot be used alongside a solar diverter. If you are using the HydroNova with a compatible solar power diverter upon install, the Smart Switch accessory will be replaced with an Optimino PV key. Please contact our Logistics team for further assistance. If solar is planned for a future date, the solar PV ready accessory, Optimino key, can be purchased as an additional accessory.
Pipework and pipe connections are not supplied, however your plumber will have these as standard parts.
The HydroNova system is maintenance free with no servicing requirements.

HydroNova - The Complete Electric Water System
Herschel’s HydroNova is the perfect high performance, electric hot water heating system to complement your electric infrared panel heaters.
Using innovative and patented technology within a heat battery, HydroNova incorporates Herschel’s smart control switch (HN1)† to ensure mains pressure hot water is available on demand without the requirement to store large volumes of water – a much more compact solution that frees up valuable cupboard space.
† Note: the HydroNova comes with a HN1, as standard. The HN1 cannot be used alongside a solar diverter. If you are using the HydroNova with a compatible solar power diverter upon install, the HN1 accessory will be replaced with an Optimino PV key. Please contact our Logistics team for further assistance.

Professional Specification Service
Contact Herschel for assistance with your HydroNova Hot Water Heating Requirements.
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