Worcester Greenstar 9 Ri ErP+ Regular Boiler (Natural Gas)
The
Worcester Greenstar 9 Ri ErP+ Regular Boiler is a compact yet powerful gas-fired condensing boiler, designed for homes with a traditional open-vented heating system and separate hot water cylinder. Delivering exceptional efficiency and quiet operation, it’s the ideal choice for small properties looking for reliable heating performance without compromising on energy savings.
Energy-Efficient and Eco-Friendly
With an impressive
ErP A energy efficiency rating and a seasonal space heating efficiency of
92%, the Greenstar 9 Ri ensures optimal performance while keeping running costs low. This condensing boiler achieves up to
98.1% efficiency at low temperatures, helping homeowners reduce energy consumption and carbon emissions. Its low
NOx output of just 32 mg/kWh also makes it an environmentally responsible choice.
Quiet and Compact Design
Operating at just
45 dB, the Greenstar 9 Ri runs exceptionally quietly — perfect for installation in kitchens, airing cupboards, or utility rooms. Its compact size and lightweight design make it easy to fit in a range of internal spaces, while the clean, modern styling complements any home.
Reliable Worcester Bosch Quality
Built by
Worcester Bosch, the Greenstar 9 Ri reflects the brand’s reputation for outstanding reliability and engineering excellence. Designed for longevity and ease of maintenance, it’s an excellent option for households upgrading an older regular boiler or modernising their heating system.
Key Technical Specifications
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Model: Greenstar 9 Ri ErP+ Regular
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Product Code: 7733600306
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Rated Heat Output: 9 kW
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Energy Efficiency Class: A
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Seasonal Space Heating Efficiency: 92%
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Useful Efficiency at 30% Load: 98.1%
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Sound Power Level: 45 dB
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Condensing Boiler: Yes
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NOx Emissions: 32 mg/kWh
Why Choose the Worcester Greenstar 9 Ri?
This model is ideal for smaller homes or flats with lower heating demands, particularly where space is limited but reliability and efficiency are essential. When paired with a hot water cylinder, the Greenstar 9 Ri delivers consistent, dependable hot water and heating performance throughout the year.
FAQs
Q1: What type of system is the Worcester Greenstar 9 Ri suitable for?
The 9 Ri is a
regular (heat-only) boiler, designed for homes that already have a hot water cylinder and a cold water storage tank in the loft. It’s ideal for traditional open-vented systems.
Q2: How efficient is the Greenstar 9 Ri?
It boasts a
92% seasonal efficiency and can reach up to
98.1% efficiency under low-temperature operation, meaning it’s highly efficient and environmentally friendly.
Q3: Is the Greenstar 9 Ri noisy when running?
Not at all. The boiler operates at a quiet
45 dB, making it one of the quieter models in the Worcester Bosch range — perfect for indoor installation without disturbance.
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