ᐅ Heating System Quote Comparison – Request for Your Experiences

Please note that an additional 5,000 to 7,000 for small parts and control components will be added to the price. This is likely just the cost of the device itself.

Tx-25 schrieb:

We have firmly decided on an air-to-water heat pump.

OK, that’s settled then. The main thing is that you have considered everything. Still, I stick to my advice to listen to the chosen unit in operation under load. When are you planning to build? I’m planning my build starting from 03/2020.

The new Weishaupt BiBlock is supposed to be very good. Just Google it. Unfortunately, it seems to be a bit of a niche device, but very solid and truly quiet.

Tx-25 schrieb:

In my opinion, the gas and solar thermal system isn’t as good as a heat pump combined with photovoltaics.

That’s unfortunately true. Solar thermal isn’t very effective either; technically, a heat pump combined with photovoltaics makes sense. But this combination often promises more than it delivers in practice. Keep in mind that gas can also be combined with photovoltaics.

Tx-25 schrieb:

Here is the calculation. So it’s useless for the heating? Will the heat load calculation be done by the heat pump supplier?

The room-by-room heat load calculation is usually made by the heating contractor (or subcontracted) or the energy consultant who handled the thermal protection certificate. In practice, however, the heating contractor often only estimates the heat load and builds “as always.” You should ask whether the room-by-room heat load calculation is included and properly documented in your complete offers.

The final result of the thermal protection certificate is useless for the purpose of the room-by-room heat load calculation. These are two different values, like answering “How much fuel does your car use?” with “100 hp.” OK, joke aside—the room-by-room heat load calculates the required power (in watts) to keep a room at the desired temperature even under design conditions, which depending on the region, might be -10°C (14°F) outside temperature. This happens rarely but must be ensured.

On the other hand, your energy performance certificate shows the total energy demand (in kWh) over the year, including sunny, moderate, and cold days. You obviously cannot just divide that by the number of days, as there must be enough heating capacity available on the coldest day.

Power: watts > heat load calculation on the coldest day
Energy: joules or kWh (= power times time) > energy performance certificate

So our air-to-water heat pump outdoor unit from Weishaupt is only audible in freezing temperatures if you stand right next to it. On the patio or in the garden, you cannot hear anything, and certainly not inside the house. So it is very subjective when @Detlev69 talks about "disturbance" or something like that. Make your own experience; for us, the noise level has never been an issue...

Detlev69 schrieb:

Please adhere to netiquette. Comments like these are unacceptable. It’s fine to have a different opinion, but remarks below the belt should be beneath your dignity.

It’s always easy to present your own opinion as an irrefutable fact, to throw around populist slogans, and then to remind others of netiquette when being corrected.

Detlev69 schrieb:

If such significantly cheaper heat pump tariffs exist, that’s great. Exactly where are these "enough locations"?

Most people know where they are building their house and can inform themselves accordingly. This information was provided in response to your comment, "An air-to-water heat pump is never worthwhile because the cheapest gas price in Germany is lower than the most expensive electricity price in Germany."

If you have chosen gas as the better energy source for yourself, that’s fine. However, your heat pump bashing does not help anyone.

Lumpi_LE schrieb:

to recall in case of a correction.

That was not a correction, but simply a different opinion. Secondly, of course a correction would be welcome, but phrases like "complete ignorance" are completely unnecessary — and in this case inaccurate. I have thoroughly researched and calculated everything. Anyone can recalculate my cost example using their own rates and then decide for themselves. Those who really have an extremely cheap electricity rate for heat pumps will be able to recognize and take that into account.

For everyone else, which is likely the vast majority, the situation unfortunately is exactly this: the gas-to-electricity factor and the annual performance factor basically cancel each other out. Do you really disagree with that?

Matthew03 schrieb:

Make your own experience; for us, the noise level was and still is absolutely not an issue...

That’s exactly what I recommended: listen yourself and decide. But of course, under load and not just passing by randomly when there really is nothing to hear.