Controlled residential ventilation - yes or no

Hello,

here I am again.
Yesterday we signed the purchase contract for a new-build condominium.
The house will have a brine ground-source heat pump and all the apartments will have underfloor heating.
We were offered a controlled residential ventilation system. Now I have done some research, but apart from better ventilation, is the heat recovery really that good or does it fit with the ground-source heat pump?
I have not yet seen the details of the cost estimate, but the developer mentioned a price of 12,000 euros? I personally find that a bit too much.
Is that a realistic price?

Best regards
sevenofnine

Why did you sign when not all your wishes were clarified yet?

At first, I was talked out of it, which is why I didn’t buy it, but I had an "enlightenment" during the shell construction phase. My heating guy also wanted to charge 12-15 just like that. I then looked around locally and one of them still installed it later into the shell construction... for 6.5.

I don’t regret my decision! But I would add a purge ventilation switch in the bathroom and kitchen... but now it’s too late.

The real price is the question of what is included?!

Our system costs about 7000 for a single-family house (device alone costs almost 4000 on the internet) including everything, i.e., installation and enthalpy exchanger. Mind you, for 8 rooms on 2 floors. The 12,000 sounds like a lot, but it also depends on the performance and which special features are included. I certainly wouldn't build without it. Why don't you have a similar one offered by an external company, then you can estimate the price.

Why did you sign if not all your wishes have been clarified yet?

Because otherwise the apartment is perfect for us. It meets all my wishes: a private garden for my cat and my herbs, finally a larger living space, underfloor heating and less dependent on oil and gas, then it is barrier-free (which has become important for me following my doctor's latest diagnosis), two underground parking spaces and not to forget, the location is much better, as I live on the edge of fields but can reach everything on foot at the same time: doctors, shopping, pharmacy, etc.

The only thing is the controlled residential ventilation. I had never heard of it until a colleague of my husband told us he wouldn't want to do without such controlled residential ventilation. I have heard many different opinions about it. So far, the positive opinions prevail.

Maybe a silly question: how is the compatibility regarding the air flows? (I'm thinking about my cat right now )

Then I will ask the developer to give me the offer with all the data. He still wanted to take care of it. Yesterday at the notarization I already asked for alternative offers. I will best ask again myself.

Thanks for your answers!

Best regards sevenofnine

I asked about the signature because it is more difficult to negotiate afterwards.

The airflow is not noticeable unless you hold your hand in front of the valve. My kitties also lie in the corner of the living room where the valve is, and it doesn't bother them.

We have signed a conditionally suspensive purchase contract and agreed that as long as the developer does not fulfill the condition to start construction, both parties can terminate the contract. In our case, this means: two 5-family houses will be built and he will only start construction when 5 buyers have signed a contract. That will take some time, as only 2 have signed so far.

Thanks for the note about your cats.

Best regards
sevenofnine