Controlled residential ventilation or regulated air - experiences?

....It just has to be calculated individually...

Where is it calculated individually? Most people save those few € in planning costs anyway!

Regards

Where is it calculated individually? Most people save those few € in planning costs!

Well, in connection with controlled residential ventilation, there are various things that can/must be calculated... this starts with the supply/extract air volume flows, the placement of the valves, the impact on the sizing of the heating system, insulation of the pipes to prevent condensation, etc. etc...

My initial focus here was on an economic feasibility calculation.
If someone says anyway that they want controlled residential ventilation with heat recovery simply because they find it great not to have to ventilate manually anymore, then the economic aspect will take a back seat.
On the other hand, if someone installs controlled residential ventilation with heat recovery because they think it will save them money in the long run, then it can become interesting to play with the numbers...
Likewise for someone who wants a certain level of automatic ventilation but is now considering whether the extra cost for a fully developed controlled residential ventilation system with heat recovery is worth it...

Well, in connection with controlled residential ventilation there are various things that can/must be calculated... it starts with the supply/exhaust air volume flows, the placement of the valves, effects on the sizing of the heating system, insulation of the pipes to prevent condensation, etc etc...

Correct! The better a building is insulated, the more significant the influence of a controlled residential ventilation/heat recovery is within the overall energy balance.

....My initial concern here was about an economic feasibility calculation......If someone installs a controlled residential ventilation with heat recovery because they think they will save money in the long term, then it can be interesting to play with the numbers...

When it comes to one’s own wallet, it’s better not to play around A controlled residential ventilation/heat recovery system is not separate from the rest of the technical equipment. The overall context is important! Not seldom, a controlled residential ventilation/heat recovery system causes, besides the additional comfort, investment effects through its influence on the standard heating load and the room heating load. The heating surfaces become cheaper, and possibly a heat generator can be chosen with one performance level lower (especially interesting with a heat pump), etc..

...Also for someone who wants a certain automatic ventilation but is now considering whether the extra cost for a full-fledged controlled residential ventilation with heat recovery is worth it...

Apart from how one financially values comfort, in individual cases the entirety should always be decisive. Those who actually have the time to ventilate daily by opening windows according to necessities can certainly do so.
There is absolutely no binding obligation for a controlled residential ventilation/heat recovery system, although vendors of ventilation systems like to suggest this!
Window ventilation is, according to 1946-6, a recognized state of the art, provided minimum moisture protection is ensured. However, user behavior is usually significantly different. In the morning, the air is fully exchanged within short periods and in the evening one returns again! A completely different system state!

Window ventilation is recognized as an LtM according to 1946-6, provided that the minimum moisture protection is ensured. However, user behavior is usually significantly different. In the morning, the air is exchanged within short periods and in the evening you return again! A completely different system state!

Exactly for this reason, I consider it sensible to have an automatic ventilation system in every new building, which ensures a certain minimum exchange rate or also ramps up in case of high humidity. Window ventilation is then no longer a mandatory necessity that has to be performed several times a day but can be carried out, as "before," according to need.

There is no binding obligation for controlled residential ventilation/heat recovery, although sellers of ventilation systems like to suggest that!

That's exactly what bothers me. Any ventilation alternative is often not taken seriously. It is pretended as if there were only controlled residential ventilation with heat recovery and everything else would actually be silly and only associated with disadvantages... Then it is also pretended that you would recover the investment costs again within a very short time...

Correct! The better a building is insulated, the more significant the influence of controlled residential ventilation/heat recovery within the overall energy balance.

and the higher the percentage share of the electricity and maintenance costs of controlled residential ventilation in the "heating costs."

When it comes to your own wallet, you should rather not take chances. Controlled residential ventilation/heat recovery is not detached from the other system technology. The overall context is important! Not infrequently, controlled residential ventilation/heat recovery causes, besides additional comfort, investment effects through the influence on the standard heating load and the room heating load. The heating surfaces become cheaper, a heat generator can possibly be chosen one performance level lower (particularly interesting with heat pumps), etc..

You have to take chances depending on the case... simply because you cannot know! For example, the price development of oil/gas/electricity etc... Similarly, the assumed service life of controlled residential ventilation can play a role in whether it will ever pay off economically or not.. But of course there are also tangible facts that have to be taken into account.. Such as potential savings potential on heating, financing, maintenance, and operating costs... Basically, even the geographic location has a major influence (average temperatures, solar radiation etc).

Since, in our case, heating optimization (or a savings potential) through controlled residential ventilation more or less falls away (district heating...), the calculation was simpler for us personally. There, heat recovery, especially with our heating costs, was completely uneconomical.. The comfort factor remains, but there we decided to invest the saved money in other things that ultimately provide us with more comfort...

....Since with us the heating optimization (or a savings potential) through controlled residential ventilation more or less does not apply (district heating...) the calculation was simpler for us personally.

Energy production or provision generally has nothing to do with its utilization in a blanket sense

Regards

Energy generation or provision basically has nothing to do with its utilization

That’s not what I meant ;P

However, there is no potential for savings in the sense that I could, for example, take a "smaller" heat pump or operate it in a "better" range...

I simply get my xxxx kWh of thermal energy delivered directly to my doorstep and have no heating efficiency that I could positively influence through controlled residential ventilation..

If heat recovery saves me 5000 kWh per year, then I have exactly this saving and no other money-saving effects like someone with a heat pump might have had...