WORC GS 25I ERP I COMBI NG BLR 00012

The Worcester Bosch Greenstar 25i ErP is a compact, wall‑mounted condensing combi boiler designed to provide efficient central heating and instantaneous domestic hot water without the need for a separate cylinder. Running on natural gas, it’s an ideal choice for small to medium-sized homes looking for reliable performance and low running costs from a trusted manufacturer, Bosch Thermotechnology Ltd (Worcester).

Engineered for ErP compliance, this boiler delivers high efficiency and quiet operation in everyday use. Its simple controls and compact footprint support straightforward installation and maintenance, while built-in protection features help ensure dependable performance throughout the year. Compatible with a wide range of controls, it fits easily into modern heating systems and supports convenient, responsive temperature management.

• Type: Natural gas condensing combi boiler
• Nominal domestic hot water output: 25 kW
• ErP efficiency class: A (heating and hot water)
• Instantaneous hot water delivery; no hot water cylinder required
• Compact, wall‑mounted design for flexible siting
• Quiet operation for everyday comfort
• Built-in frost protection
• Modulating pump for improved efficiency
• Compatible with Worcester Bosch and standard heating controls
• Horizontal and vertical flue options
• Suitable for small to medium homes (typically 1 bathroom)
• Manufacturer: Bosch Thermotechnology Ltd (Worcester)