Some people must make things up.I am an ex Babcok and Wilcox fitter, and built these boilers in the 70s. The boiler feed pump supplies the boiler with treated water, and the FD and ID fans supply air to and from the burners . The rest is common sense.
It seems these days the RNLI is like the RAC,why the other fishing boat can not help ,and let the service save lifes and keep the costs down. Keep up the good work
brill,many thanks.