Inspection of house systems

Hello

we have an air heat pump and solar thermal on the roof. Additionally, a Grünbeck water softening system.

Silly question, with the car you preferably go for an inspection every year. How does it work with the systems? Should the plumber come every year? Or how do you handle it

Thanks

I think it's the same with an air heat pump as with a gas boiler: it should be serviced annually :-)

Our heat pump with solar system: In the first 2 years once, so that you have warranty extension up to and including year 5 (even without further maintenance). Recommendation from our heating engineer: once a year. After last year's maintenance by the heating engineer: You can also do that yourself, except venting the solar system,...