Professional Builder reviews Herschel Select XL Professional Builder magazine outlines how easy it is to install our Herschel Select XL panel, seen here being mounted in an attic games room. Related posts:Brand new! Hand painted bespoke heating panelsBullseye! "I think it's excellent". Professional darts player, Wayne Mardle, chooses HerschelHow do I heat my cold studio workshop? Posted on 18th July 201620th July 2020 by Sam Abel