ᐅ Air source heat pump with a central ventilation system

Andi3579 schrieb:

Thanks for your comments. So it might be better to skip the solar panels on the roof for now (they can be added later more easily) and keep the ventilation system… that actually sounds reasonable in hindsight.

That would mean no longer achieving KfW 40+ standards, but still KfW 40…

At first, we were against a mechanical ventilation system with heat recovery because our general contractor (GC) didn’t recommend it. After some research online, we decided to go for it.

And whether you install a mechanical ventilation system or solar panels? If it were me, I’d do both. I would only install a battery storage system if subsidies are available, which depends on the country. As mentioned before, the solar panels are the only thing on the house that pays off and “pays you back.” Another option to consider is a geothermal heating system. That way, you avoid having the bulky unit in front of your house, and the ground-source heat pump is much more efficient than an air-source heat pump. The costs should not be much higher either.

Tom1978 schrieb:

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The costs probably shouldn't be much higher either.

Well, the extra charge for drilling is definitely noticeable.

Schimi1791 schrieb:

Well, the additional cost for drilling is definitely noticeable.

For us, it would be around 5,000 euros. However, we have to use surface collectors because it is a water protection area. In that case, the price was the same as for the air-to-water heat pump.

Tom1978 schrieb:

For us, it would be about €5,000.

However, for the original poster, this could be very different depending on soil conditions and other factors.

We have had a central ventilation system with heat recovery (aluminum cross-flow heat exchanger and heating coil) for many years. We would never want to do without it again. Thanks to self-installation, it was feasible for less than 3,000 euros.

For clarity, we should refer to solar thermal systems or photovoltaics. Otherwise, there could be confusion. Photovoltaics are certainly very useful. Solar thermal systems probably less so.