Worcester Greenstar Highflow 550CDi ErP LPG Combi Boiler
The Worcester Greenstar Highflow 550CDi ErP LPG is a powerful, floor-standing combination boiler built to meet the heating and hot water demands of larger homes. Designed by Worcester Bosch, one of the UK’s most trusted boiler manufacturers, this model provides high efficiency, excellent reliability, and impressive performance for households that need plenty of hot water — fast.
If your home isn’t connected to the mains gas supply, this LPG version offers an ideal off-grid heating solution without compromising on comfort or performance. Its condensing technology ensures energy is used as efficiently as possible, reducing both fuel consumption and emissions.
Exceptional Efficiency and Performance
With a rated heat output of 31 kW, the Greenstar Highflow 550CDi is built for homes with higher heating and hot water needs. It delivers an outstanding seasonal space heating efficiency of 92%, helping to keep running costs low and comfort levels high.
Its water heating efficiency of 71% and XL load profile mean you’ll enjoy powerful, consistent hot water across multiple taps or showers at once. Whether you’re filling a bath or running several bathrooms simultaneously, this boiler has the power to keep up with your family’s lifestyle.
Quiet, Reliable and Built to Last
Even with its high performance, the Greenstar Highflow 550CDi operates quietly, producing just 52 dB of sound — about the same level as a normal conversation. Worcester Bosch has designed this model for long-term reliability, with robust internal components and simple maintenance requirements.
As a condensing combination boiler, it doesn’t require a separate hot water cylinder, freeing up valuable space in your home. It’s also equipped with energy-saving features to minimize standby losses and improve overall efficiency.
Technical Overview
This model offers the following key technical details:
Energy Efficiency Class: A (Heating) / B (Water Heating)
Rated Heat Output: 31 kW
Seasonal Space Heating Efficiency (?S): 92%
Water Heating Efficiency (?wh): 71%
Sound Power Level (Indoors): 52 dB
NOx Emissions: 23 mg/kWh
Annual Fuel Consumption: 22 GJ
Annual Electricity Consumption: 79 kWh
Condensing Boiler: Yes
Combination Heater: Yes
Installation and Maintenance
Installation should always be carried out by a qualified Gas Safe registered engineer. The product comes with detailed installation and operating manuals that include all necessary safety, recycling, and maintenance information. Following these guidelines will help ensure optimal performance and a long service life.
The Greenstar Highflow 550CDi ErP LPG is the perfect choice for large family homes, multi-bathroom properties, and off-grid households seeking a dependable and efficient heating solution.
Frequently Asked Questions (FAQs)
How powerful is the Worcester Greenstar Highflow 550CDi LPG boiler?
The Highflow 550CDi has a rated heat output of 31 kW, making it one of the most powerful combination boilers in the Worcester Bosch range. It’s capable of meeting the demands of large homes with multiple bathrooms or high hot water usage.
Is this model suitable for homes without mains gas?
Yes. This boiler runs on LPG (Liquefied Petroleum Gas), making it ideal for rural or off-grid homes where mains gas isn’t available. It delivers the same performance and efficiency you’d expect from a natural gas model.
Does the Greenstar Highflow 550CDi require a separate hot water tank?
No. As a combination boiler, it heats water directly from the mains whenever you need it, meaning you don’t need a separate hot water cylinder. This saves space while still providing excellent flow rates.
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