ᐅ Ventilation system in summer?

Hello,

I prefer not to consult a construction blog when it comes to basic physical principles. Could you provide a link to a decentralized mechanical ventilation system with heat recovery that has a heat recovery efficiency of 0.9? If the data sheet is available, I would gladly reconsider my opinion.

Wow, now the source isn’t good enough for a forum discussion ... but 90% is normal if you look at the datasheets, and no one here mentioned decentralization. In my opinion, these things are mostly a marketing gimmick anyway, and I don’t really understand why anyone would buy a central system without a bypass. Controlled residential ventilation is supposed to provide comfort, after all, and even a manual bypass would be unacceptable to me.

Of course, I’m talking about a central system. This is about new construction, right?

You are welcome to keep your opinion; my intention here was just to clarify the physical basics for those who are interested. Some time ago, I worked through all the calculations myself on how controlled residential ventilation, thermal capacity, heating and cooling capacities, cooling through underfloor heating, heating through radiation, shading, and so on actually work – and the calculation above is just a small excerpt.

Grym, what does your current plan look like? I understand you’re thinking of aerated concrete and gas heating, right?

Alex85 schrieb:
90% is normal when you look at the datasheets, and no one mentioned decentralized here

I couldn’t quickly find any datasheet showing 90%. Why start a discussion based on half-knowledge when it can be addressed correctly from a physical standpoint? And of course, the original poster was referring to a decentralized system. Anyway, I don’t expect much else from you besides opinions and personal views. If you disregard solid evidence, it’s natural to rely on amateur blogs instead.

Knallkörper schrieb:
I couldn’t quickly find a datasheet with 90%.

Poor research.

Knallkörper schrieb:
Why argue with half-knowledge when you can be physically accurate?

Then why not bring up the expertise of Prof. Dr. Someone? That would benefit us all.

Knallkörper schrieb:
And of course, the original poster wanted a decentralized system.

Aha. It’s not mentioned anywhere. On the contrary, the original poster spoke of “the system.”

Knallkörper schrieb:
Whatever, I don’t expect much from you except opinions and views.

And from you, I only get online Tourette’s.

Knallkörper schrieb:
Anyone who disregards well-founded knowledge naturally prefers layman blogs.

You’ve already made your choice. Why the passion? Grym’s source isn’t flawless either — the guy is happy to save a few pennies in electricity with his clever control of the mechanical ventilation with heat recovery system. Had he chosen one with heat recovery, this would be a minor issue and he could have saved a lot of drilling. So what? And whatever you say about Grym, he tends to waver, but he engages with the topic and doesn’t seem ignorant; he can explain things clearly. Considering you deliberately and consciously decided against mechanical ventilation with heat recovery, I wonder what your contribution to this thread could be.