I recently had a new sealed heating system fitted by plumber, all rads
and boiler downstairs and all worked fine. I have now added a radiator
upstairs along with some fernox protector but the new rad needs
constantly bleeding, every other day and after bleeding needs
refilling. The air doesnt seem to burn but does smell a bit sulphery.
The water in the rads seems clear. Before I added the fernox the gas
didn't smell but I didn't test it to see if it burn't. What could this
be. Could the problem always have been then but have been
automatically been bled at the boiler or have I caused it with flux in
the pipes I added for the new radiator? .
Any ideas ?

Thanks

Steve Jones

Rumour has it that Fernox is just diluted suplhuric acid and could
account for the smell.

How are you refilling the rad after bleeding ?