In article ,
Doctor Drivel wrote:
Low water capacity boilers were around in the 1960s. Some aluminium
heat exchanger are around, but most now are going to stainless steel
spiralled tubed. Impurities in the system can be baked on the insides
of these tubes, reducing efficiency. I have seen some totally blocked
because the system was not cleaned or protected. That is why it is
important that a Magna Boost is fitted, protecting the boiler's heat
exchanger.

Have you never heard of inhibitor, oh one of the tiny mind?

--
*Arkansas State Motto: Don't Ask, Don't Tell, Don't Laugh.

Dave Plowman London SW
To e-mail, change noise into sound.