Strom 21kW Three Phase Combi E-Boiler - 400V Electric Combi Boiler, Touchscreen, No Flue

The Strom 21kW Three Phase Combi E-Boiler is a compact, high-efficiency electric combi boiler designed for properties without a gas supply, delivering instant hot water and central heating with a 21kW output, integrated pump, expansion vessel, and touchscreen controls.

Product Description

The Strom SBTP21C is a modern three-phase electric combi boiler engineered for seamless integration into existing heating systems. It features a serpentine heating element for rapid response, a full-colour touchscreen for intuitive operation, and no requirement for a flue or gas connection. Perfect for off-grid homes, flats, or properties on Economy 10 tariffs, it provides reliable hot water and space heating with near-silent operation and over 99% efficiency. The boiler includes a built-in pump and expansion vessel, making installation straightforward and space-efficient.

Key Features

• 21kW output: Sufficient for heating and instant hot water in larger properties.
• Three-phase 400V supply: Ideal for high-demand applications like multiple baths and showers.
• Touchscreen interface: Simple controls and status display.
• No flue required: Can be installed almost anywhere, including cupboards.
• Integrated components: Pump and expansion vessel for complete system readiness.
• Near-silent operation: Minimal noise for residential comfort.
• High efficiency: Over 99% with zero CO2 emissions.

Technical Specifications

• Model: SBTP21C – Strom 21kW Three Phase Combi E-Boiler.
• Heat output: 21 kW.
• Voltage: 400 V, Three Phase.
• Amps: 32 A.
• Min breaker size: 40 A.
• Min cable size: 3 x 6 mm².
• Flow rate: Limited by water supply (3-phase recommended for baths).
• Max heating pressure: 1.5 bar.
• Protection class: IPX4.
• Operating temperature: Suitable for domestic hot water and central heating.

Dimensions & Weights

• Height: 700 mm.
• Width: 425 mm.
• Depth: 260 mm.
• Weight: 29.1 kg.

System & Application Notes

• Ideal for properties off the gas grid, flats, or where traditional boilers cannot be fitted.
• Compatible with solar panels and Economy 10 tariffs for cost savings.
• Installation: Wall-mounted; no flue needed; professional electrician required for three-phase supply.
• Supports central heating and domestic hot water; perfect replacement for gas/oil systems.
• 2-year manufacturer warranty (extendable to 24 months upon registration).