ᐅ What is currently the best heating system?

Bauexperte schrieb:
Hello,

There is a lot of nonsense said and written about air-to-water heat pumps, but that doesn’t mean they are purely electric heaters.

As with many things in life, it is important to have a proper system design and to install equipment that matches the actual demand. If these conditions are met, the share of electricity used for backup heating remains within reasonable limits. By the way, no heating system operates without electricity.

Best regards

Dear Bauexperte,

Which air-to-water heat pumps are not purely electric at -20°C (-4°F) as I mentioned? When I installed my last outdoor air-to-water heat pump about four years ago, that was still the case. I would be interested to know if there are better options now!

Kind regards

K.Brodbeck

Hello,

K.Brodbeck schrieb:

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

Which system - monovalent, monoenergetic, or bivalent?

Kind regards

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

First, you should check the operating limits specified by the manufacturer. For example, if -15°C (5°F) is listed as the lower limit, below that temperature only the electric heating element runs. But what does that actually mean?

The share of electric heating element usage (COP=1) in 2009 was only about 1.5% of the annual heating demand. Negligible in the overall context. In 2008, it was not used at all.
Considering regional climate data is especially crucial for air source heat pumps!
The operating costs for air source heat pumps are the most variable!

Best regards.

Bauexperte schrieb:
Hello,


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

Best regards

Monovalent

Regards

K.Brodbeck

€uro schrieb:

The heating rod share (AZ=1) accounted for only about 1.5% of the annual heating load in 2009. Negligible in the overall context. In 2008, it was not used at all.
Considering regional climate data is crucial, especially for air-source heat pumps!
Energy costs for air-source heat pumps are the most variable!

I fully agree with this; the reference was specifically to an air-source heat pump that provided a warm home at -20°C (-4°F)! I wanted to emphasize that at -20°C (-4°F), the system probably relies solely on electric heating, so it is not so much the heat pump’s performance that keeps the house warm, but rather the skill of the building technician in properly sizing the heating system!

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

Best regards

K.Brodbeck

If I were you, I would build to the KfW 55 standard and use an air-source heat pump, which, based on feedback from four two-person households, consumes about 4200 kWh per year on average. The pump also heats the water. It is advisable to have a wood stove for the colder days. You can also install a photovoltaic system on the roof; a system generating around 6000 kWh per year, if your house is oriented south, currently costs about 11,000 euros. I am actually doing the same myself. Of course, all information is very general.