I was the owner of the older model turbo plus 21. Simple machine, fast and reliable connection. I replaced the old one with the new one these days. I heard about low emissions, low consumption, quiet... However, I have been frustrated with the whole process of first ignition or rather its adjustment. Yes, because it requires special settings... One time it didn't have proper fuel ventilation, another time it didn't start because it was too early in the morning and the weather was cold, add another expansion tank to prevent pressure from rising and blowing the fuse, even though it already has its own but it's not enough (then why do you have it and charge me for it???). Change the nozzle because the one it has is for Korean fuels (why don't you just bring me the right one??). Install a heated filter (as if we have heavy oil on ships traveling to the North Pole... Why do I ask again, why don't you install that instead of the plain fixed filter that can't even be unscrewed to be cleaned...???). Change the pressures of the oil pump, etc, etc... The only good thing is that there is customer service Monday to Friday until 16:00. Don't let it happen on a Friday afternoon if you have any questions about the connection... So, you should know that it definitely requires a technician from the company to perform the first ignition... if you buy it. So not only the increased price for purchasing it, but also sensitive in many aspects. Add the cost of an experienced technician in the end (obviously an experienced technician with special seminars from KITURAMI on this specific model). (place an ad to find him...) As an example, the technician recommended by the company along with the materials (new nozzle, heated filter, and labor) asks for 250 to 300€ plus VAT and an appointment after 4 to 5 days... To summarize, 2000€ for the purchase, 370€ for the first ignition. If I had known at the time I was doing my research, I would have excluded it more, not just because of the whole hassle of the first ignition...