Which heating system is currently the best?

Hello,


A lot of nonsense is said/written about air-to-water heat pumps; that does not make it an electric heater by any means.

As with everything in life, it is important that a reasonable planning of the system is in place and that the system installed matches the demand. If these conditions are met, the proportion of "supplementary heating" with electricity remains within reasonable limits. By the way, no heating system runs without electricity.

Kind regards

Dear Bauexperte,

which air-to-water heat pump is not purely electric at -20° (as I wrote)? When I installed my last outdoor air-to-water heat pump about 4 years ago, this was still the case; I would be interested to know if there are better ones now!

Best regards

K.Brodbeck

Hello,

When I installed my last outdoor air-to-water heat pump about 4 years ago, it was still like that ...

Which system - monovalent, mono-energetic, or bivalent?

Kind regards

...which air-to-water heat pump heating system is not purely electric at -20° (as I wrote)? When I installed my last outdoor air-to-water heat pump about 4 years ago, that was still the case, I am curious if there are better ones now!

First of all, one should check the operating limits specified by the manufacturer. For example, if -15°C is defined as the lower limit, below this limit only the heating element runs. But what does that actually mean?

The share of the heating element (COP=1) in 2009 amounts to only about ~1.5% of the annual heating work. Trivial in the overall context. In 2008 it is not used at all.
Consideration of regional climate data is especially essential for air heat pumps!
For air heat pumps, consumption costs are the most volatile!

Best regards.

Hello,


Which system - monovalent, mono-energetic or bivalent?

Kind regards

Monovalent

best regards

K.Brodbeck

The electric heater share (AZ=1) accounts for only about ~1.5% of the annual heating work in 2009. Petty in the overall context. In 2008 it was not used at all. Considering regional climate data is especially crucial for air heat pumps! Consumption costs are the most volatile with air heat pumps!

I do not disagree with this in the slightest, in this context a reference was made to an air heat pump that produced a warm apartment at -20°C! I wanted to explicitly point out that at -20°C it probably heats purely electrically, so it is not a special performance of the heat pump to get the house warm, but rather a performance of the building technician to size the heating system large enough!

I do not want to misuse the thread any further in this regard but am happy to continue discussing elsewhere or via private messages!

Best regards

K.Brodbeck

If I were you, I would build to the KFW 55 standard, use an air heat pump, which, according to consultation with 4 two-person families, consumes on average about 4200 kWh per year. The pump also heats the water. It is also recommended to use a wood stove on cold days. You can also install a photovoltaic system on the roof, a system that provides 6000 kWh per year if your house is south-facing, currently costing about 11,000 euros. I'm doing it exactly the same way now, of course all information is very general.