Worcester Greenstar 25 Si Compact ErP Combi Boiler

Worcester Greenstar 25 Si Compact ErP Combi Boiler


Regular price £1,240.56 Excl. VAT
£1,488.67 Incl. VAT
Sale price £1,240.56 Excl. VAT
£1,488.67 Incl. VAT
Regular price
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Key Information

Product Information

Worcester Greenstar 25Si Compact ErP Combi Boiler

The Worcester Greenstar 25Si Compact is a high-efficiency, wall-mounted combi boiler designed for small homes with a single bathroom. Combining advanced Worcester Bosch engineering with a compact footprint, it provides reliable heating and hot water while fitting neatly into limited spaces.

Efficient Heating and Hot Water

This boiler achieves a central heating output of 24kW and a domestic hot water output of 25kW, making it ideal for properties with up to 10 radiators and one bathroom. Its 94% seasonal space heating efficiency and ErP A-rating help reduce energy bills, while the built-in low energy pump further optimises electricity use.

Compact Design for Small Spaces

With dimensions of just 690 x 390 x 280mm (HxWxD), the Greenstar 25Si Compact can easily be installed within a standard kitchen cupboard, making it perfect for homes where space is limited. Its user-friendly controls and boiler frost protection ensure reliable, safe operation throughout the year.

Flexible and Reliable

This model is LPG compatible, allowing installation in homes not connected to mains gas. Its combi design eliminates the need for tanks or cylinders, simplifying installation and freeing up living space. The boiler also benefits from Worcester Bosch’s up to 10-year warranty, providing long-term peace of mind.

Technical Specifications

- **Brand:** Worcester Bosch - **Model:** Greenstar 25Si Compact ErP Combi - **Boiler Type:** Wall-mounted Combi Boiler - **Heat Output:** 24 kW (CH), 25 kW (DHW) - **Flow Rate:** 10.2 L/min - **Efficiency:** 94%, ErP A-rated - **Fuel Type:** Natural Gas / LPG - **Mounting:** Wall-mounted - **Warranty:** Up to 10 years - **Condensing:** Yes - **Dimensions:** 690mm H x 390mm W x 280mm D

Frequently Asked Questions

Is the Greenstar 25Si Compact suitable for small homes?

Yes, it is ideal for homes with a single bathroom and up to 10 radiators.

Can it use LPG?

Yes, this boiler is fully compatible with LPG.

Is it energy-efficient?

Yes, it has a **94% seasonal efficiency** and **ErP A-rating**, helping reduce heating bills.

Can it fit in a kitchen cupboard?

Yes, with compact dimensions of **690 x 390 x 280mm**, it can easily fit within most kitchen cupboards.

What is the warranty period?

After installation, it comes with a **Worcester Bosch warranty of up to 10 years** for peace of mind.

Why Choose Us

At JJ Building Materials, we're committed to supplying quality building products at competitive prices, backed by the service and expertise you'd expect from an established independent merchant. Whether you're a trade professional managing large-scale projects or a homeowner taking on a DIY renovation, we're here to help you find the right products for the job.

As part of the JJ Roofing Supplies Group, we build on decades of experience supplying construction materials across the UK. We've expanded beyond roofing to offer a growing range of building materials, including timber, insulation, landscaping products, plumbing supplies, flooring, doors, bricks, fencing, garden buildings and much more – all available to order online with nationwide delivery.

We work with many of the industry's leading manufacturers to bring you trusted products that meet the highest standards of quality and performance. Our team is passionate about providing excellent customer service, competitive pricing and a straightforward shopping experience from start to finish.

When you shop with JJ Building Materials, you can expect:

  • Competitive prices on leading brands and quality products.
  • Nationwide delivery across the UK
  • A constantly expanding range of building and landscaping materials.
  • Friendly, knowledgeable customer support.
  • A trusted business backed by the JJ Roofing Supplies Group.

Delivery

Every order is personally reviewed by our experienced team to ensure everything is correct before dispatch. We offer delivery from as little as the next working day on selected products, so please refer to the dark blue Estimated Delivery box above for the expected delivery timeframe for this item.

We work with trusted manufacturers and specialist delivery partners to ensure your order arrives safely and on time. You'll receive tracking details once your order has been dispatched, and if we need to confirm any delivery details, one of our team will contact you directly to keep everything running smoothly.

Roof Tiles & Fittings:

We recommend ordering an additional 10% of roof tiles to allow for any breakages that may occur during delivery or handling. Roof tiles are naturally fragile, and having a few extra on site helps prevent delays and ensures your roofing project can be completed without interruption.

Worcester Greenstar 25 Si Compact ErP Combi Boiler

£1,240.56

Can I collect this product from a local branch?

Absolutely. Check availability at your nearest branch during checkout or contact us directly.

Do you offer bulk pricing or trade discounts?

Yes, we offer competitive rates for trade customers and bulk orders. Contact our team for a tailored quote.

What if the product arrives damaged?

Please notify us within 48 hours of delivery. We’ll arrange a prompt replacement or refund as needed.

How fast is the delivery time?

Most items are delivered within 2–5 working days, depending on stock and location. Some products may take longer times.

What is the Return Policy?

We accept most returns within 14 days of delivery, provided the items are unused, in their original packaging, and in resalable condition. Please contact our customer service team to arrange a return or discuss any concerns.