ᐅ Is a ventilation system cost-effective? Does it save money?

Often, the benefits of systems are considered without taking human behavior into account. I don’t want to know how many people in their homes with such systems have already missed the penultimate maintenance appointment for the filters. The extent to which the comfort gain of no longer having to ventilate manually balances against the recommended effort for controlled residential ventilation probably depends on the type of system. Manufacturers recommend a visual inspection every 3-6 months and replacing the coarse filter at that time. The fine filter is replaced less frequently, and a full maintenance service is usually done every 12 months. Anyone who follows this schedule obviously pays significantly more than someone who sees it as just a way to make money. Hygiene institutes actually support the manufacturers in this regard. With a decentralized system, the number of filters multiplies. I would find that absolutely terrible.
It’s not for me. I’m already annoyed by the kitchen extractor hood—but at least that doesn’t determine the quality of the air I breathe.
The difference between theory and practice is easy to define: in theory, there isn’t any.

wiltshire schrieb:

With a decentralized system, the number of filters increases. I would find that quite terrible.

In fact, most systems will notify you when it’s time to change the filter. It takes about 15-20 seconds per device. Or longer if you cut the filters yourself instead of using ready-made ones. Then you get new filters every three months and an automatic check at the same time.
It’s not really much effort — although many people are probably too lazy to do it anyway...

wiltshire schrieb:

I’m already annoyed by the kitchen range hood – but at least it doesn’t affect the quality of the air I breathe.

Well, its grease content does. Did I already mention that sentence-ending emoticons are sorely missing?

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nordanney schrieb:

You don’t really have much effort involved – although many are probably too lazy to do it anyway...

By laziness, that’s primarily what I mean.
The “not much effort” point is true when looking at each individual task. You just need to keep the filters in stock and simply take a few minutes to complete the tasks when they are due.
But I also mean the sheer number of these “not much effort” tasks. For various devices, you manage an inventory of consumables: filters, descalers, salt… all in different sizes. It adds up, much like customer accounts with utilities and service providers. Here the phone company, there the electricity provider, over there the water supplier, and who knows how many other customer accounts. Eventually, you sit there and, in the best case, log into your account without using “forgot password” and download the invoices for your tax return with “not much effort” (often navigating a “better” designed web interface).
I am one of those people who tend to find the accumulation of these demands overwhelming. That is why I aim for solutions that avoid this. A gain in convenience is not the same for everyone. Who would want to claim to be the “standard” for that?

Thank you all for the responses. I already suspected that the payback period of 10 years might be a bit overestimated. However, if the contractor is referring to the cleanliness and dust deposits in my lungs, then he is probably right. So it seems that the investment does pay off financially to some extent over time, and it also brings positive side effects that can’t be quantified yet. Why doesn’t everyone do this then? It sounds like a great investment...

I would like to point out that the topic of subsidies has not yet been fully taken into account. If you receive 10-20% of the purchase costs funded by BAFA, the calculation becomes significantly more favorable...