Kacy,
Your last post re "5.55 million units." / "If CFU earns just $1k for each mCHP boiler produced that's $5.5 billion p.a. return." appears to assume that every one sold has a CFU device hooked up to it!
Even the most optimistic Pollyanna (as Jaded would say) wouldn't assume that. However, if even 1% of those was hooked up, you are talking $55M, which is still a very nice figure.
Cheers.