Danni I'm trying to follow all of the acronyms you're using and I've had to google them.
So correct me if I'm wrong but NBE is a Danish pellet boiler company and the RTB is the ready to burn model that they make?
I see that it comes in 10, 16, 30 and 50kw units. Are they all the same unit with different settings for different output? The Windhager come sin a 21kw or 26kw. It's the same model you just configure a dip switch for the output that you want. I've always had mine set on 21kw and never had an issue.
What about the Kedel? I remember hearing something about it being Danish made but then I also remember someone saying something about Czech Republic.
I think Okofen and Frohling are also both Austrian. Am I correct? I know that Windhager has a presence in Austria, Germany, and the UK. Are there some brands that are more dominant in certain European nations?
Sorry, US/EN is not my native language (I guess it is obvious)
NBE = Danish Company, started by Kim Gregersen and Jannik Hansen
KEDEL = US Brand - in Denmark it is sold as Scotte or Woody, in Czech as OPOP etc.
Black Star boiler = NBE design, produced in Czech
External (big red) and Mini (small black) hopper = NBE design, produced in Czech
External Black Star auger = No idea
Pellet burner = Designed and produced in Denmark, developed in 1999 and advanced since then.
RTB boiler, hopper, auger etc = designed, produced in Denmark (new top line model - altso called Ready to burn)
I am not aware if NBE own OPOP in Czech which produce the Black Star boilers, but I am sure they have interest in the company for sure! but RTB production is all Danish!
Specs...
The Burner:
10kw = own size burner
16kw = settings for 16 and 20kw (24kw as well - more to this, old options, due to slightly different burner tray (option))
30kw = own size burner
50kw = own size burner
The Boiler:
10kw+16kw burner uses the Black Star 1016 boiler (BS1016) - different burner for 10kw and 16kw as I wrote above
20kw option (same burner as 16kw) it uses the Black star 2030 boiler
30kw bigger burner, but still the Black Star 2030 boiler
50kw bigger burner uses the Black Star 4050 boiler
there is also an 40kw option and also MUCH bigger options than 50kw - perhaps not testet/aproved in the US yet.
The RTB boiler:
10 and 16kw is the same boiler, only the burner is replaced
30kw is a bigger boiler
it is the combination with the burner area and boiler ability to use the amount of effect ind the "fire" that gives the different combinations. The "force" of NBE burner/boiler setup is the wide modulation due to the combination of internal and external auger and this, in theory, saves pellets.
NBE is the biggest European branch - meant, it has sold significant most boiler setups around europe. The Austrian brands are more "isolated" due to need of installer and service from installer - the whole initial idea of the Black star series was for DIY people, and the RTB for installer/service like the Austrian brands (well, I installed it myself and regulated it from the Oxygen sensor and ash)
The brands most Bio nerds in my forums talk about is NBE/Blackstar/RTB and MGM (google Slimpel) and som Swedish models (older Tech, but stabel) and the brands you mention - but due to prices of the brands you mention, not many in my forums has these - one of two users only.