Areas covered
London, Essex and Hertfordshire. Each area page covers the housing stock there and what it tends to mean for heating systems — because a 1930s Metroland semi and a 2018 flat have very different problems.
London
Hertfordshire
Not listed?
These are the areas where we have engineers covering the work. If you're just outside, send the enquiry anyway — coverage extends beyond the named towns, and we'll tell you straight if we can't help rather than sitting on it.
Get an honest answer on what your system needs
Tell us the symptoms. We'll pass it to a Gas Safe engineer covering your area who can tell you whether you need a flush — including if the answer is no.