hello all been reading and learning from the boiler room forum here for a while very informative, my question is if anyone has any knowledge about menominee boilers at all they went out of business back in the 80 s I am trying to find out what the btu output is for my MBW 7900 I have the installation manual but it doesn't have btu rating and also I would like to set up storage for the boiler do I need the btu rating to figure into amount of storage needed.