Central ventilation system - is moisture recovery necessary?

2020-01-05 10:58:03

If you have done something, write it down, I can't read minds. The problem is that people can misunderstand it, I didn't want to say more.

No, I didn't measure anything, the air was stuffy, you could tell, and our ventilation only allows 3 levels, I removed the night setback. And the ventilation runs continuously at level 2, which air exchange rate that is, I would have to check in the calculation. If I were to build again, then with supply and exhaust air in the room without overflow openings. With the condition of being able to regulate individual rooms.

You are right. If you can only set level 1, level 2, and level 3, it's clear that you can't adjust that very well with your system. With my device, I can freely set the fan speed for each level, e.g. level 1 = 27%, level 2 = 40%, and level 3 = 75% of maximum power. This way you can exactly calculate the air exchange rate and adjust it quite well. And then you can let level 3 run for two hours at certain times or level 1 for five hours, etc.

2020-01-05 11:03:46

In theory, yes. In practice, most hardly change the set stage values. In other words, it only switches back and forth between stage 1/2/3 and that's it.

I can freely set my device for each stage, including at what power the fans run, e.g., stage 1 = 27%, stage 2 = 40%, and stage 3 = 75% of maximum power.

The majority of systems have these options. It is rather an exception nowadays if the stages are unchangeable.

2020-01-05 11:22:45

I can also set the individual % per hour. But to do that, I would first have to measure the CO2 values.

That currently has no priority.
And the switching of the levels is very limited.

2020-01-05 11:28:07

Yes, that sounds great. Then you can also - if you feel like it - move on to the fine-tuning.

I believe that many installations are simply set up terribly (and maybe also poorly planned?) and that's why problems with overly dry air often arise. And only when a proper setting no longer helps should further steps be taken.

2020-01-05 11:31:55

To really adjust a system properly, you would need to control the rooms individually. Unfortunately, this is not possible with all the single-family house controlled residential ventilation units, very unfortunate that the manufacturers do not offer anything in this regard.

2020-01-05 11:40:17

To properly set up a system, the rooms would have to be controlled individually. Unfortunately, this is not possible with all the single-family house Controlled Residential Ventilation units, very unfortunate that the manufacturers do not offer anything in this regard.

In principle, you are absolutely right about that. But a Controlled Residential Ventilation system is already a relatively "expensive luxury". I think if the devices become even more expensive because of something like this, hardly anyone will install them anymore.

ps: As someone who tends to be a "cheapskate," I will nevertheless afford this expensive luxury of a Controlled Residential Ventilation system in a new build....

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Central ventilation system - is moisture recovery necessary?

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