Hi I need to replace my Gledhill water cylinder which is faulty. I have looked at the Advanced Thermal Store which looks like it could be a replacement for the Gledhill - there does not seem to be that many. I have also looked at the Joule - plumber said since I have access to an outside wall, I can have an unvented cylinder. Is it better to install another thermal store or go for the unvented? Is Joule a good brand? Thank you
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