Harlequin HeatStream Electric Plus 210L Indirect Mains Hot Water System

Key Information

• 210-litre capacity — ideal for larger homes and properties with higher hot water demands
• Indirect thermal store design — incorporates a primary coil for alternative heat sources
• Open-vented thermal store — not subject to Part G Building Regulations
• No G3 qualification required — simplifies installation requirements
• 14-bar rated primary coil — suitable for district heating and higher-pressure applications
• Fast pre-heat capability — heats from a boiler in as little as 10 minutes
• Mains pressure hot water — delivers strong and consistent performance
• ErP B energy rating — supports efficient energy usage
• Low standing heat loss — only 1.12kWh per day
• Compatible with off-peak electricity tariffs — helps reduce running costs
• Suitable for use with solar PV systems — maximises renewable energy generation
• Compact 520mm x 520mm footprint — ideal for smaller airing cupboards
• Reduced legionella risk — supports improved water hygiene
• 5-year warranty — added peace of mind

What's Included

• Harlequin HeatStream Electric Plus 210L Indirect Mains Hot Water System - HS210EPLUS

The Harlequin HeatStream Electric Plus 210L Indirect Mains Hot Water System is designed for larger households and properties with higher hot water demands. Combining a generous 210-litre capacity with flexible heating options, it delivers reliable mains pressure hot water while offering excellent energy efficiency and straightforward installation.

Perfect for modern homes, apartments, and larger residential properties, it provides an innovative alternative to traditional hot water cylinder.

Indirect Thermal Store with Flexible Heat Sources

The HS210EPLUS features an integrated primary coil, allowing it to utilise an alternative heat source alongside its electric operation. This makes it suitable for connection to boilers, district heating systems, and other compatible heat sources, providing greater flexibility and helping improve overall efficiency.

Its 14-bar rated primary coil is specifically designed to handle demanding applications, making these thermal store cylinder suitable for a wide range of installations.

Fast Heat-Up Performance

The integrated primary coil can pre-heat the store in as little as 10 minutes when connected to a suitable heat source. Combined with the large-surface-area stainless steel corrugated coils, this allows for exceptionally fast heat transfer and efficient hot water production.

This helps ensure a reliable supply of hot water even during periods of heavy demand.

Simplified Installation

As an open-vented thermal store, the HeatStream Electric Plus is not subject to Part G Building Regulations or the discharge requirements associated with traditional unvented systems. There is no need for an expansion vessels. temperature and pressure relief valve, or G3-qualified installer.

The system can discharge via an external overflow connection, a low-temperature internal waste pipe, or an internal overflow solution where required.

Efficient, Durable, and Low Maintenance

The HS210EPLUS achieves an ErP B energy efficiency rating and features standing heat losses of just 1.12kWh per day. It can also maximise the benefits of off-peak electricity tariffs and solar PV systems, helping reduce energy costs where suitable renewable or lower-cost electricity sources are available.

Its durable polyethylene outer shell helps resist accidental damage, while the polypropylene inner tank is non-corrosive and particularly suitable for areas with poor water quality. Minimal maintenance requirements and a reduced risk of Legionella help keep ownership costs low over the long term.

Ready to Upgrade Your Hot Water System?

If you're looking for high-performance hot water cylinders that combine excellent capacity, flexible heating options, and efficient operation, the Harlequin HeatStream Electric Plus 210L is an outstanding choice.