I plan to install a new boiler in my radiant heating system and I am considering a Baxi Luna HT330. However, I have the grey polybutylene heating tubes (non-barrier) in a concrete floor. I've had corrosion problems in my existing Laars Minitherm system, and I 'm concerned about having similar problems in a new system.

The Baxi Luna has a stainless steel heat exchanger but does not have any type of certification for use with polybutylene pipe. Does anybody have any experience or opinions on using this system with polybutylene? The installer says it should be okay given the stainless steel exchanger and their use of a water treatment chemical.

Thanks,
Mike

Your best bet is to contact Baxi Luna directly. They will give you the best answer you will get.