Question on installing a conventional boiler

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Have been asked to replace an existing conventional Baxi with another Baxi on an unvented system. Have not got my unvented ticket yet but as I would only be replacing the boiler and not touching the unvented cylinder etc am I allowed to do it?

 

[gas4you]

Yes can't see any problems. The un-vented ticket only relates to the cylinder and all components/safety devices fitted to it.

 

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Cheers . Nice one