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Stoßlüften: Shock Ventilation

116 点作者 sirobg超过 1 年前

24 条评论

neonate超过 1 年前
<a href="https:&#x2F;&#x2F;web.archive.org&#x2F;web&#x2F;20231230110629&#x2F;https:&#x2F;&#x2F;www.thelocal.de&#x2F;20190117&#x2F;stolften" rel="nofollow">https:&#x2F;&#x2F;web.archive.org&#x2F;web&#x2F;20231230110629&#x2F;https:&#x2F;&#x2F;www.thelo...</a><p><a href="https:&#x2F;&#x2F;archive.ph&#x2F;KW0ZC" rel="nofollow">https:&#x2F;&#x2F;archive.ph&#x2F;KW0ZC</a>
wongarsu超过 1 年前
A big part of why this works so well in German homes is that they have a high thermal mass. Even single family homes are built with concrete floors and plastered over brick walls (brick as in square building block, I think the currently popular form is expanded concrete?).<p>In these buildings, you can replace all air with outside air at once, and once you close the windows the thermal mass of the building will quickly heat it up again.<p>New buildings tend to move away from it though, instead using automatic fans for ventilation
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vidarh超过 1 年前
This is used in Norway as well (and I suspect many other places).<p>The term uses the same structure &quot;sjokklufting&quot;, which like the German means shock ventilation.<p>A quick search in the Norwegian National Library dates the Norwegian use of this specific term pretty firmly to ~1974 or so.<p>Interestingly <i>all</i> the uses of the term in writing in Norwegian media in 1970&#x27;s seem to either be or echo the text in an ad from Jøtul, one of the largest manufacturers of cast-iron fireplaces as a negative (making it too cold), while many later mentions are positive, though also with a tinge of &quot;we&#x27;re only doing this as a fallback because our ventilation isn&#x27;t good enough&quot; in quite a few articles.<p>A somewhat more common Norwegian variant describing much the same is utlufting (&quot;out-ventilation&quot;) or storutlufting (&quot;big out-ventilation&quot;), which is found in print at least back to the 1850&#x27;s, and which tends to imply much the same, though perhaps with a less negative slant.<p>At some point around the 1980&#x27;s, the viewpoint seems to have changed from promoting this as a good thing to describing the need for it as evidence of poor ventilation systems.<p>My mum would often do this, and I do it myself too, - open several windows at least a couple of times a day during winter to rapidly clear out stale air. The benefit vs. less ventilation all the time being that while you&#x27;re cooling the air, it&#x27;s short enough that <i>you</i> don&#x27;t lose much heat, and neither does the building mass. It&#x27;s overall much more pleasant when it&#x27;s really cold outside than having a window open a crack on an ongoing basis.
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Phelinofist超过 1 年前
I&#x27;m German and this was drilled into my head since I was a child. My dad insisted on doing this. Every landlord I had so far required doing this to avoid mold. I do it before I go to sleep, because some fresher&#x2F;cooler air also helps me sleep better. It is also done in offices and schools.
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blub超过 1 年前
This “Stoßlüften” is just opening a couple of windows for several minutes to create a draft.<p>There’s a nice booklet about ventilation for regular Joes called “Richtiges Lüften in Wohnungen” (Proper ventilation in apartments) published by the Fraunhofer IRB (i.e. information centre for inner spaces and construction).<p>This booklet explains the role of material and air humidity, how ventilation became important as buildings became more airtight, how relative humidity works, etc.<p>A key observation is that the main purpose of such intense ventilation is refreshing the air, i.e. removing unpleasant smells and CO2.<p>Landlords, experts and courts of law have nevertheless settled on the idea that 2-3x intensive ventilations per day are necessary to avoid mould.<p>The booklet claims that dehumidification is ideally achieved through “Spaltlüften”, which is keeping a window partly open for a <i>longer</i> period of time: the cool outside air enters the room in small quantities which can be quickly heated, thereby drying said air and enabling it to absorb additional humidity. Due to the longer ventilation period, materials which absorb humidity such as drapes, carpets, wallpaper or plaster can release said humidity which shall be absorbed by the dry air and ultimately exchanged with outside air. The heater must stay permanently on so that the cool air can be heated.<p>Some apartments have passive mechanical ventilation such as openings in the rubber seals of the windows or ventilation slots in the window frames which follow this principle.
BrandiATMuhkuh超过 1 年前
My landlord here in Austria put that in the flat &quot;manual&quot;. It&#x27;s the main technique to avoid high humidity in Winter. Because high humidity means you won&#x27;t feel warm and it fosters mold.
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jeffrallen超过 1 年前
Shock ventilation is a habit of Swiss housewives which is diametrically opposed to the new &quot;Minergie&quot; standard for green homes, which provides for air exchange via a super expensive heat exchanger system which extracts heat from stale air before sending it out.<p>Of course everyone who lives in Minergie homes opens the windows each morning while hanging out the duvets, and&#x2F;or complains that the enormous windows are too big to open, or don&#x27;t open at all.<p>It&#x27;s like all the Minergie engineers were so busy at work they didn&#x27;t notice what their wives were doing at home. (I assume the original engineering for these hear exchangers was in the 70&#x27;s when that gendered statement was not controversial!)
exo-cortex超过 1 年前
<a href="https:&#x2F;&#x2F;youtu.be&#x2F;wx68Q_6omAo?si=gY_p3P80LPGnmOsu" rel="nofollow">https:&#x2F;&#x2F;youtu.be&#x2F;wx68Q_6omAo?si=gY_p3P80LPGnmOsu</a><p>--&gt; Switch on captions.<p>This is a small segment of a weekly program that is broadcast on the french-german tv station &quot;arte&quot;. The program is called &quot;karambolage&quot; and highlights interesting peculiarities in French or German culture or funny anecdotes about etymiology, history. It&#x27;s quite fun. They had this piece about a french exchange student that discovered a requirement to regular &quot;stoßlüften&quot; in the rent-contract.
layer8超过 1 年前
&gt; Let’s start with the translation. Literally, Stoß means “shock, impact or thrust” and lüften means “ventilating.” Stoßlüften therefore translates to “shock ventilation.”<p>I’d say the connotation is more of a quick blowing out, ejection or (im)pulse, not a shock. Compare also “ausstoßen” and “Stoßatmung”. The main feature is the short duration.
mhb超过 1 年前
European Windows Are Awesome<p><a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=38818803">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=38818803</a>
timrichard超过 1 年前
I’ve started doing this in my home office after buying a CO2 monitor. It’s worked out pretty well. I don’t trade much room temperature at all to get back close to 400PPM.
franczesko超过 1 年前
It&#x27;s also due to the fact, that many German buildings are old and therefore carry poor ventilation parameters.<p>Newer buildings probably don&#x27;t need shock ventilation, as it&#x27;s better by design.
mxstbr超过 1 年前
This is the first German word I taught my (American) partner and it is, to this day, likely our most used German word. Such a core concept to our entire culture!
kyledrake超过 1 年前
If anyone wants way too much information on doing continuous ventilation fans in your house to improve air quality:<p><a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=25139125">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=25139125</a>
throwaway8877超过 1 年前
It helps when you don&#x27;t have actual appropriate mechanical ventilation as you should have with modern windows and insulation.<p>A large part of the European buildings still don&#x27;t have proper ventilation.
drsim超过 1 年前
My Velux roof windows do this automatically for me every day. Works great as they won&#x27;t open if it is raining or too cold. Sucks that the radiators don&#x27;t turn off at the same time, so some wasted energy there.
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euroderf超过 1 年前
AFAIK it&#x27;s more typically known simply as &quot;Luft&quot; (&quot;air). And the idea is great. Flush the room of aerial crud as quickly as possible so that objects in the room retain their heat.
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alkonaut超过 1 年前
Sounds like building codes haven’t forced old buildings to be retrofitted with decent ventilation. If that’s not possible then it shouldn’t be a school.
bill38超过 1 年前
See also <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=38819249">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=38819249</a>
palemoonale超过 1 年前
Not possible in the US with all its closed-up office and hotel rooms.
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Franzeus超过 1 年前
Funny - Doing this exact thing while reading this post
HL33tibCe7超过 1 年前
Is this not a waste of energy?
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Freak_NL超过 1 年前
Website doesn&#x27;t seem to work. I get a header, a footer, but no content.
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the_mitsuhiko超过 1 年前
I was just joking about this today. For years I have heard all kinds of dismissive attitude to this concept yet the last few months tech Twitter has been full of people buying really expensive CO2 meters, presumably because they were unaware of CO2 in rooms?<p>When you buy a Window here, or you rent a flat it usually comes with a manual that asks you to ventilate regularly and how.<p>If you ventilate properly, a CO2 meter is entirely pointless. CO2 levels are very predictable and you can also usually tell when the air quality drops through your senses.
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