Difference in purchase cost between gas pump or heat pump

What does "no" maintenance mean? After a few years (estimated from 5?), surely even the best heat pump will break down / be worn out at some point? What are your experiences with this?

You yourself also installed the Geisha? It is the Panasonic WH-MDC05f3e5, right? Because otherwise I can't find anything about it. At first I thought Geisha was a manufacturer I had never heard of before.

No maintenance means exactly no maintenance. Of course, it is also necessary for heat pumps, but very few are aware of this and it is not as extensive as with a gas boiler.

With heat pumps, maintenance is only done when something breaks and heating costs explode, instead of relying on regular maintenance. Hence the usual advertising slogan "no maintenance".

With heat pumps, maintenance is just ("warten" meaning letting time pass) done until something breaks and the heating costs explode, instead of relying on regular maintenance ("warten" meaning checking the heat pump and, if necessary, replacing parts). Hence also the usual advertising slogan "no maintenance."

I added it. But yes, thanks.

With heat pumps, they just wait until something breaks and heating costs explode, instead of relying on regular maintenance. Hence the usual advertising slogan "no maintenance".

What is actually maintained on a heat pump?
Our heating engineer said that the heat pump does not need to be maintained (it’s basically just a refrigerator with more electronics). All other heating components can be inspected, though.

Maintenance depends on the type of heat source (air, groundwater, earth). The following should be maintained regularly:

[*]Expansion vessel(s)
[*]Heat exchanger for air heat pumps (due to contamination from pollen, fine dust, possibly leaves)
[*]Condensate drains, if present (due to blockage)
[*]Domestic hot water preparation (e.g. descaling of heat exchangers)
[*]Check heating water quality (due to corrosion)
[*]Check brine quality in geothermal systems (due to antifreeze)
[*]Groundwater systems: check the quality of the well water as well as the water levels in the wells (these can change)
[*]Leak tightness of refrigerant circuits according to ChemKLimaVO depending on the type of construction (hermetically sealed or not) and the amount of refrigerant
[*]Check electrical connections (e.g. retighten terminals)

Depending on customer requirements, manufacturer specifications, and legal regulations (e.g. Chemicals Climate Protection Ordinance), the maintenance interval is between 1-3 years. Therefore, it is unfortunately not possible to give a general statement regarding the maintenance interval.

A heat pump is by no means maintenance-free. It is more comparable to an air conditioner (and these also require maintenance) than to a refrigerator.

The scope of maintenance for a gas boiler is not as large as one might think, by the way. It is simply legally required, unlike for heat pumps.

[*]Expansion vessel(s)
[*]Heat exchanger for air heat pumps (due to contamination from pollen, fine dust, possibly leaves)
[*]Condensate drains if present (due to blockage)
[*]Domestic hot water preparation (e.g. descaling of heat exchangers)
[*]Check heating water quality (due to corrosion)
[*]Brine quality for geothermal systems (due to antifreeze)
[*]Groundwater systems: check well water quality as well as water levels in the wells (these can change)
[*]Leak tightness of refrigeration circuits according to ChemKLimaVO depending on the design (hermetically sealed or not) and the refrigerant charge
[*]Check electrical connections (e.g. retighten terminals)

So basically everything around the heat pump and not the device itself. That's what I said

So nothing really "breaks" inside the device itself. I would therefore skip the "maintenance."