ᐅ Heating System Quote Comparison – Request for Your Experiences

Lumpi_LE schrieb:

So, 21.1 kWh energy demand per year. That would also be covered by running the toaster for 10 minutes a day. Better double-check that.

Here, of course, I mean per m² (per 10.8 sq ft) and year. So, multiplied by 164.1 m² (1,766 sq ft) of usable area.

Well, this is probably the value from the EnEV calculation related to a heat pump. Unfortunately, it is not very meaningful. Selecting a heat pump properly is based on a heating load calculation.

@Detlev69: Thanks for the information. However, we have firmly decided on an air-to-water heat pump. We carefully considered both gas and heat pumps for a long time but ultimately chose the heat pump for several reasons. Not least because, in my opinion, the gas system combined with solar thermal is not as effective as a heat pump paired with photovoltaic panels.

We also have a perfect location for the unit that will not be visible. Regarding the neighbors, I can only give a definitive answer once the time comes.

Tx-25 schrieb:

- What else should be considered?

Define room temperatures
Perform a heating load calculation for each room
Choose low flow temperatures

Only then determine the size of the heating system based on this data.

Here is the calculation. So it’s not useful for the heating system? Will the heating load calculation then be done by the heat pump supplier?

Lumpi_LE schrieb:

without the slightest clue

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.

Lumpi_LE schrieb:

- A proper air-to-water heat pump can’t be heard even at -10°C (14°F), controlled residential ventilation systems are louder.

That seems to be your definition of “proper” and possibly a matter of your hearing.

The very well-known solid construction house provider Viebrockhaus, for example, installs established Nibe heat pumps, as do many other builders, so there are plenty available to listen to before deciding. And they can be heard. There’s no need to debate that. Many can be heard clearly enough to actually be considered a nuisance—especially the heat pump mentioned in the original question, which is among the less expensive models.

Anyway, I only advised the original poster: Listen to them yourself! — This is definitely recommended. Seller claims like “you can’t hear anything” are at best a case for your trusted audiologist or simply customer deception.

Lumpi_LE schrieb:

In plenty of areas … with a heat pump tariff even only 18

If there really are significantly cheaper heat pump tariffs, that’s great. Where exactly are those “plenty of areas”? Regardless, the original poster should check whether a heat pump tariff is available “in their area” and whether it makes sense. Of course, this might conflict with photovoltaic systems.

In Hamburg, for example, with Vattenfall, you pay 24 instead of 28 cents, but also a 15.90 basic monthly fee for this additional meter, about 180 euros per year. With expected heating/hot water costs of 720 euros per year, this can be relevant and is usually hardly worthwhile. They certainly know how to do the math.

Lumpi_LE schrieb:

costs for chimney sweep, gas connection completely left out...

Gas connection isn’t very expensive (in Hamburg: about 1,278.00), and chimney sweep inspections for modern gas heating systems are only required every three years. But yes, all costs should be included, that’s correct. Gas connection costs must be considered part of the total acquisition cost of a gas heating system.