Gas boilers


How to repressurise a heating system with an internal filling key

This video shows you how to repressurise your heating system using your Greenstar gas boiler's internal filling key.

How to repressurise a heating system with an external filling hose

This video shows you how to repressurise your heating system with an external filling hose.

How to re-pressurise your system using the new Keyless Filling Link

Learn how to re-pressurise your heating system with a simple lever-operated filling link.

Condensing boiler benefits

Why switching to a condensing boiler can help with energy efficiency.

Reasons to Cleanse Your Boiler Central Heating System

Featuring our new Greenstar System Filter and the importance of keeping your boiler and and central heating system in peak condition.

How to diagnose a problem with an external heat pump

Watch this video to see how to diagnose a problem with an external heat pump