Experience with geothermal heat pump heating systems

Hello dear forum,

unfortunately, I have to ask a relatively "stupid" question regarding a heating system operated with a geothermal heat pump...

I am currently planning to build a house. A coworker of mine decided on a heating system with heat recovery and told me that he can/is not allowed to ventilate anymore and that this is regulated by a ventilation system inside the house. This means to me that the windows are no longer allowed to be opened. Is that the case?

My actual question now refers to heating systems operated with a geothermal heat pump. Can I ventilate normally through the windows as in a house heated with oil or gas? Or should this also be avoided with geothermal heat pump systems?

Personally, I can’t imagine opening the window in the morning after getting up... Somehow Google can’t really answer this question for me either.

Maybe you can.

Thank you!

You can of course ventilate however you like.. also with a ventilation system - but you don't have to; energetically, ventilating in winter only makes sense to a limited extent.

What this has to do with the heating is unclear to me... there is a type of heating - exhaust air heat pump - that uses the exhaust air in the house for heat generation - recovering heat from the exhaust air. Cold air flows in from outside there. In this device, ventilation and heating are combined. In other devices, these are two systems - the heat generation system and the ventilation system.

Where is the advantage of a geothermal heat pump compared to an [Abluftwärmepumpe]?

On the one hand, you can install a controlled residential ventilation system with heat recovery, and on the other hand, it operates more efficiently.

If you come up with the idea to install an exhaust air heat pump, I hope you are building a passive house. Even with Kfw55, an exhaust air heat pump is the completely wrong heating system. An exhaust air heat pump draws energy from the exhaust air (somehow logical...). This can make sense in a passive house concept, but otherwise... no ;)

A large home builder with a big red V at the beginning has often installed them, google gives you thousands of bad reviews. Google Nibe F750 and power consumption... in winter you basically have an electric heater... with the corresponding costs.

In contrast, geothermal energy draws energy from the earth (also somehow logical...). Whether gas, air heat pump, geothermal energy, district heating... what is economically better depends on the exact conditions.

It seems to be working now. Here in the forum, homeowners document their consumption.

[ATTACH alt="erdwaermepumpe-152989-2.png" type="full"]10825[/ATTACH]

If you then calculate, 3000 kWh is about €62 per month for heating - with a geothermal heat pump you might be around €40