A lot of high efficiency stuff seems like that. Looks good on paper but the more complex design seems to break more often and there don't seem to be any techs who know how they work. My parents had a high end boiler installed and it took them along time to find some one who could actually service it instead of just randomly swapping parts. And the thing had issues like 2 years after they got it. Who cares how efficient something is if its broken all the time?

Didn't know that heat pumps were the same deal though, sounds worse to be honest.