I don't think Bluegen will ever sell in really large numbers -...

I don't think Bluegen will ever sell in really large numbers - it's always going to be specialised product. I see no reason, on the other hand, why integrated mCHP systems shouldn't replace a significant fraction of the boiler units already in existence. In Europe, more houses than not probably have a boiler, for hot water and central heating.

If 10 million boiler units are replaced or installed every year in Europe, half of those end up with mCHP systems, and CFCL takes 20% of the market, that's a million units a year... That could make CFCL a ten billion dollar company.

There are a lot of ifs in that, and probably fifteen years, but even so...