ᐅ Air-to-water heat pump plus centralized ventilation system with active cooling – which type?

Hello dear forum,

I am new to this forum and have a question.

Our two-family house (270 sqm (2906 sq ft)) will likely have a wide south-facing side. Because of this, I am worried that it will become unbearably hot inside the house during summer, and we are considering a ventilation system with active cooling.

We plan to install an air-to-water heat pump as the heating system, combined with underfloor heating.
We are still uncertain about installing a ventilation system. If we do install one, it will definitely be a centralized system, not a decentralized one (due to noise pollution from outside). I have several questions:

a) How effective is an air-to-water heat pump combined with a centralized ventilation system with cooling, especially regarding heat recovery? For example, as a monoblock unit? Or a split system (heat pump and mechanical ventilation with heat recovery)?

b) Which combinations or manufacturers of air-to-water heat pumps plus ventilation systems with active cooling can you recommend?

c) How many degrees difference can the new ventilation systems with active cooling provide?
I mean not a ventilation system that only exchanges warm indoor air for fresh outdoor air.

d) Or are ventilation systems not able to compete with air conditioning?

I am already very grateful for any answers!

Ventilation system with active cooling – which type should it be?

Basically, please ensure the south-facing side has the possibility for shading.

Offtopic schrieb:

Ventilation system with active cooling, which one do you mean?

I'm not sure if I used the correct term with active cooling, as I've only been looking into this topic for a few days.
I understand there are mechanical ventilation systems with heat recovery that include a summer bypass, which can create a temperature difference of several degrees. Can such a bypass be installed in any mechanical ventilation system with heat recovery?

Or is there something different?

I mean, not just the 3–4 degrees that a heat pump with a cooling function can achieve?

Offtopic schrieb:

Basically, please equip the south side with shading options.

Yes, it depends on the side. The garage has only a few windows, and the larger ones will have blinds.

This summer bypass only "cools" at night when the outside air has cooled down and then transfers the cool air inside, bypassing the heat exchanger. Whether this is very effective, I personally doubt.

With our decentralized ventilation system in the old house, we definitely did not notice any real cooling effect.

You can also cool with a heat pump and underfloor heating system, but even that is not comparable to an air conditioning unit.

If you want proper cooling, you can't avoid using an air conditioner.

Okay, I thought there wouldn't be something like this yet. The air exchange rate of a controlled residential ventilation system is far too low to provide cooling; even this summer bypass is nonsense...
You can't even notice the exhaust function that creates negative pressure.
It's better to leave the windows open at night and let the house cool down naturally.

If cooling is needed, please use an active air conditioning system.

An air-to-water heat pump with a cooling function is supposed to work, but it's not even remotely as effective as an air conditioner.

We made the mistake of installing only roller shutters. When they are down, the house is noticeably cooler in summer, of course, but also very dark. That's why on the ground floor it’s better to install Venetian blinds and outside, a retractable awning or patio roof with blackout options.

Thanks in advance for the feedback.

Offtopic schrieb:

Air-to-water heat pumps with a cooling function are supposed to work, but they don’t come close to the performance of an air conditioner.

Costruttrice schrieb:

You can also cool with a heat pump and underfloor heating, but even that is not comparable to an air conditioner.

That would be insufficient for me, and you end up with cold feet or at least colder feet. I wouldn’t want that either.

Costruttrice schrieb:

This summer bypass "cools" only at night when it’s cooler outside and then carries the cool air inside, past the heat exchanger. I’m doubtful how effective that really is.

Yes, but that would at least be a little cooler, and if you keep everything darkened or shaded during the day, the coolness should last longer.

Offtopic schrieb:

If cooling, then please actively with an air conditioner.

That’s exactly the question I’m currently considering. But an air conditioner uses significantly more electricity than a controlled ventilation system.

A compact unit with ventilation, heating, hot water preparation, and cooling functions—can you find anything like that in the technical specifications?