To use the map on the right hand side, zoom in to your local area, then click on the title of the installer in the pop-up.
Alternatively why not have a look at the top 20 rated boiler installers just below the map.
If you still can't find a suitable installer you can use the search box to look for an installer that specialises in a particular type of boiler, installs in a particular region, or just about anything else!
Your installer not on the map? Get them to give us a shout - inclusion on this database is completely free!