Which heating system for a multi-family house, heat pump not eligible for subsidies?

But what I would be especially interested in is which heat pump manufacturer/type could be used without reservation for the multi-family house in terms of price/performance/guarantee without subsidies (without fear and worries compared to the well-known manufacturers that it will fail in service)

What capacity does the calculation tell you. Manufacturers/types, apart from the market leaders in Germany, would be for example the Panasonic Aquarea J in 12kW WH-MXC12J9E8 or 16kW WH-MXC12J9E8 or from LG the Therma V Monobloc S, which is also available in similar capacities.

What I don’t understand, however, is this: They all cost only about half compared to the well-known manufacturers and would, although not for me, even be eligible for subsidies. If, as mentioned above, I also don’t need the expensive chimney in my new building, the heating system would even be cheaper than oil or gas heating. So why are people still crazily installing unsubsidized new oil heating systems (even during renovations, you usually have to retrofit a plastic pipe in the chimney)? Well, with oil or gas heating, you can of course save on buffer tanks.

Where is the catch with these cheaper heat pumps? Can the above-mentioned pumps really be installed without any worries?

Some should be a bit louder, so possibly more distance is needed to comply with the noise emission limits to the neighbor. How this is with the specific devices must probably be checked in the technical datasheets.

Where is the catch with these cheaper heat pumps? Can the above-mentioned pumps really be installed without any worries?

Panasonic is one of the largest heat pump manufacturers worldwide and certainly not a backyard developer. They practically invented the heat pump. Modulating compressors, phase control, pulse width modulation – none of that comes from Germany, but from the Far East. Whether it was Panasonic, Mitsubishi, or LG (Korea) I don’t know, but they all know what they’re doing.
Why are they so “cheap”? Because heat pumps are not rocket science, actually easier to build than gas or oil condensing boilers. (Almost) The whole world heats and cools with heat pumps, and accordingly many of them are made by the big tech companies. The material is not particularly complex, the only sensitive parts are the compressor and the software for control, so that efficiency is as high as possible.

Generally, monoblock units are cheaper than the split units commonly installed here in the country. The difference is that with a split unit, the evaporator and compressor are outside and a refrigerant line leads to the indoor unit. There is the condenser/heat exchanger and ancillary components (3-way valve for hot water, expansion vessel, possibly sludge separator).
In the monoblock, the pump and heat exchanger and sometimes also the expansion vessel are built into the outdoor unit. This means you don’t need an extra unit indoors, just a control panel and piping plus a valve for hot water preparation. And you don’t have to handle refrigerant, so you don’t need a license for installation/start-up.

In Germany, it’s all a matter of market access: installers have been working with Viessmann, Buderus / Bosch, Vaillant, Weishaupt and maybe Wolff for 70 years (or longer). And if they need something, they ask them. Panasonic (and all other Asian/American competitors) are simply not so well established in Germany yet → see Carrier entry at Viessmann.

Appearance also always plays a role here, and you have to admit that a Bosch turbine in the front yard looks better than the Asian pump with backyard air conditioner look. But that is changing too. The new Panasonic K/L series is quieter than Hydrosplit (refrigerant in the outdoor unit with heat exchanger – only water pipes indoors and there an indoor unit with pump, filter, expansion vessel and 3-way valve for quasi “plug and play”), uses propane as refrigerant, and visually is more at the German market level – for that also somewhat more expensive than the predecessors, but significantly cheaper than some competitors.

Hello,

since I still don't have heating but now have to make a final decision whether to install a gas heating system with a biogenic liquefied gas tank in the garden or to go for a heat pump, I wanted to get your opinions again. I have now received an offer where I can get a heat pump for almost the same price as the gas heating system because it still uses the old refrigerant R410A. The heat pump is a Bosch Compress CS7001iAW 17 ORE-T with 13kW. The heating engineer said that I can expect a heating load of about 30W/m2 for my building. Is it realistic that a 13kW pump is sufficient for heating and hot water (a 9kW heating element is integrated as a reserve)?

Here are my final data again:

Multi-family house with 4 residential units and about 15 people in total, total living area approx. 404 m2, under construction since 2020, circulation line only on the ground floor because of a somewhat longer pipe to the kitchen, no ventilation system, underfloor heating on the ground floor and attic floor, possibly only heat pump radiators in the attic. Standard outdoor temperature at my location is -12.4 degrees.

U-value floor slab: approx. 0.24
U-value wall: approx. 0.23
U-value roof: approx. 0.15-0.17
U-value window: approx. 0.90
U-value roof window: approx. 1.10

I am torn back and forth, have googled a lot in the past few days, but am still totally uncertain. These heating loads are mostly calculated based on 20 degrees room temperature. What if all parties want a few degrees more, how does that affect things?

I would be very grateful for your help, as I have to decide in the next few days, otherwise the heat pump will be off the table because of the costs. Thank you.

The heating engineer said that I can expect about 30W/m2 heating load for my building. Is it realistic that a 13kW pump for heating and hot water is sufficient here (9kW heating element integrated as a reserve)?

I would guess that it is more than sufficient. Especially with the support of the heating element. Is the hot water storage tank as planned?