LTM decentralized ventilation system experience exchange

Who wants to share their experiences with the LTM decentralized ventilation system with me.
I have a newly built Tuscan house covered with 42.5 Termopor plan bricks, triple glazing with RAL installation and of course the LTM ventilation.
I have to say, even though the LTM cost a lot of money, I would install it again at any time.
I am enthusiastic about the system.
I would appreciate feedback from a fellow LTM user.

Hello Gissi

I also came across this company on the internet.
Can you give a more detailed report again?
Are you still as enthusiastic?

Can you give a bit more information about your house and the system? How large is your living area? How many floors? Where and how many LTM ventilations are installed?

And what interests me most: how efficient is the heat recovery really? So far, I couldn’t find any information about this on the internet, and that makes me very cautious at first...
I insulate my house as well as possible and then drill extra holes...

I am very grateful for more information

Regards
Micha

Praises or criticisms for or against certain solutions/manufacturers/devices are often found. If one looks into the matter more technically, usually – nothing usable! Moreover, it must first be clarified whether a central or decentralized ventilation system is being discussed here. Central systems are always more effective and efficient.

The "true" value of a controlled residential ventilation lies less in the actual heat recovery and more in the "controlled ventilation" and the comfort. The heat recovery rates are efficiencies, i.e. performance-related, but they are not constant!!! At low outdoor temperatures they are high, near the heating limit hardly detectable anymore. However, this is not taken into account in energy saving regulations/KfW proofs, which results in a building with controlled residential ventilation being quite easily "beautified" in calculations. Manufacturers of course state the degree of HR at the "favorable" conditions.
The true energy recovery for the respective climate location can be calculated. At a location like "Zugspitze," very different values result compared to a "mild" climate location.
It is especially important, for intended controlled residential ventilation, to consider this accordingly in the heating load calculation and heating surface dimensioning; otherwise, especially in well-insulated buildings, it can quickly lead to significant problems.

v.g.

Hello €uro

Thank you for your contribution, but this topic was not about the sense or nonsense of a Controlled Residential Ventilation, not even about the comparison of central / decentralized Controlled Residential Ventilation, but specifically about certain products – namely the decentralized ventilation of the manufacturer LTM

But thanks for summarizing the topic of Controlled Residential Ventilation so briefly and succinctly again

Particularly important with intended Controlled Residential Ventilation is to take it into account accordingly during the heat load calculation and heating surface dimensioning, otherwise it can quickly lead to considerable problems, especially in well-insulated buildings.
v.g.

This sentence, however, is interesting – what problems do you mean by that?
What kind of problems can arise?

We will definitely build with Controlled Residential Ventilation, but I am still trying to find out which system, which manufacturer is suitable for us...

Greetings from the Ruhr area
Micha

- namely the decentralized ventilation by the manufacturer LTM

Exactly, in my opinion decentralized is generally rather less sensible, regardless of the manufacturer. If at all controlled residential ventilation, then done properly.!

...This sentence, however, is interesting - which problems do you mean by that? What problems can arise?

In new buildings, one can mostly assume well to very well insulated buildings. In terms of heating load, controlled residential ventilation plays a significant role, since the percentage share of ventilation heat losses in the standard heating load (space heating loads) is significantly higher than in moderately or poorly insulated buildings. Extremely so in passive houses or buildings close to passive house standard. Since the heating surfaces are dimensioned according to the space heating loads, the design and the later on-site adjustment of the controlled residential ventilation (air volumes => pneumatic balancing) have an essential and noticeable importance.

..., however, I am still trying to find out which system, which manufacturer is suitable for us...

The above illustration (middle or bottom) will certainly help

v.g.

Hi again

Precisely, decentralized in my opinion generally less sensible, regardless of the manufacturer. If anything, controlled residential ventilation, then properly.!

Well, the thing with "right" and "wrong" is kind of a matter of perspective...
Until recently, I was also of your opinion - clearly central ventilation
BUT
Then I heard the opinion of a medical professional in a very interesting conversation...
In the air ducts, it is always a perfect 22°-23° (or something like that) – and that continuously – perfect environment for bacteria to multiply...
And the cleaning is not exactly easy...

I don’t want my children to get sick in 5-10 years and it later turns out that the ventilation was responsible...

Simply due to the hygienic disadvantages of a central system, I am currently trying to learn more about decentralized systems...

So: You write "if controlled residential ventilation, then properly" - what exactly is "proper" from a medical point of view?

Questioning regards
Micha