ᐅ Mechanical ventilation with heat recovery instead of solar thermal energy?

Hello,

We are planning a new build that will be heated with a natural gas boiler, and we would like to install a mechanical ventilation system with heat recovery.

For natural gas heating, regulations require that 15% of the heating demand must be covered by “renewable energy.” Is it possible to meet this requirement with a mechanical ventilation system, thereby possibly avoiding the need for solar thermal panels on the roof?

Has anyone had experience with this? Would such a system even qualify as “renewable energy”? After all, heating costs are reduced, although the electricity demand increases slightly...

Thanks in advance.

Yes, that is basically possible. Your energy consultant will need to calculate it for the specific property.

Kabelmodem87 schrieb:

For natural gas heating, the law requires that 15% of the heat demand must be covered by “renewable energies.” Is it possible to achieve this with a controlled residential ventilation system and thus potentially avoid installing solar thermal panels on the roof?

I find this idea very interesting, as we are in a similar situation.
Have you had it calculated in the meantime?

You have to calculate precisely, but yes, there are examples.

We had to choose solar thermal systems and controlled residential ventilation.

Best regards,
Sabine

Curly schrieb:
We had to install solar thermal systems and a mechanical ventilation system with heat recovery.

Best regards
Sabine

Someone must have tried to sell you an expensive mechanical ventilation system with heat recovery, right? As far as I know, such a system is not mandatory under the energy saving regulations (building permit/planning permission).