Is your boiler playing up? or is it just time to get a new a rated energy efficitent boiler? then why not give us a call? Mascot ft wall hung and floor standing combination boilers (size range: - mbh) - indoor. Citric acid is often using for canning as well as bath bombs, so it’s fair to say its usages are rather varied! Stephen harris gas plumbing & heating ltd. Couldn't have asked.