This product has been Quiet Mark certified. By downloading and using this image, you agree to make a reference to Quiet Mark, keeping the Quiet Mark logo in the image and not editing it out.

The Greenstar 4000 is perfect for small to medium sized homes with one bathroom, it features a modern new design, an easy-to-use full colour text display and it’s quiet too. The Greenstar 4000 has a wide power range to meet all of your heating and hot water needs, whilst doing so efficiently.

* Up to a 10 Year guarantee when installed by a Worcester Accredited Installer. Terms and conditions apply.

The entire Worcester Bosch gas boiler range is able to run on a 20% hydrogen blend - so you can be confident it will run on gas for its lifetime.

Quiet Mark is the independent, international approval award programme associated with the UK Noise Abatement Society Charitable foundation. Through scientific testing and assessment, Quiet Mark identifies the quietest products in a given category, awarding usage permission of the famous Quiet Mark logo on the product packaging, ecommerce sites and other marketing usage.

Right now, with more people deciding to working from home more permanently. Consumers are interested in making their homes quieter, to help focus on their work, and with many kitchen tables doubling up as work desks, that includes quiet dishwashers, washing machines, coffee machines etc. Globally, there are almost 700 Quiet Mark certified products, from over 80 brands. If you see anything that interests you on our site, https://www.quietmark.com/, that isn't on our Pressloft image gallery, please feel free to get in touch, emailus@quietmark.com and we'll be happy to share images with you. Thank you.