ᐅ Ground-source heat pump with or without controlled mechanical ventilation
Created on: 22 Dec 2016 22:19
N
nautilus
Hello everyone,
we have received a cost estimate from the architect for a KfW 70 house, including a mechanical ventilation system with heat recovery. When I asked about KfW 55, the architect said that if you go with a ventilation system without heat recovery and add about €8000 (approximately $8,700) extra, then you could have a geothermal heat pump (deep probe). That would probably make KfW 55 achievable. Walls and everything else are planned according to the KfW 55 standard. He said it doesn’t make sense to use heat recovery with geothermal energy because supposedly there are no savings from it. The ventilation would then be €6000 (about $6,500) cheaper. I have to say I’m confused and don’t understand what he means. Can someone explain what he means?
we have received a cost estimate from the architect for a KfW 70 house, including a mechanical ventilation system with heat recovery. When I asked about KfW 55, the architect said that if you go with a ventilation system without heat recovery and add about €8000 (approximately $8,700) extra, then you could have a geothermal heat pump (deep probe). That would probably make KfW 55 achievable. Walls and everything else are planned according to the KfW 55 standard. He said it doesn’t make sense to use heat recovery with geothermal energy because supposedly there are no savings from it. The ventilation would then be €6000 (about $6,500) cheaper. I have to say I’m confused and don’t understand what he means. Can someone explain what he means?
markus2703 schrieb:
That’s not true, there are decentralized ventilation systems with heat recovery just as wellThat is indeed true, as decentralized systems are available both with and without heat recovery.
However, in 99% of all cases, a system without heat recovery is precisely a decentralized system — that was my main point.
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