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The bottleneck might be the air in the room

blog.mikebowler.ca

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Re: The bottleneck might be the air in the room

#491

Post by bjackman »

Gigachad wrote: post #480
bjackman wrote: post #479

Earlier quoted context omitted.

That's interesting coz I found the opposite, at my place to keep the level below 1k I usually have to open a window in the room I'm in, or use a fan. I live on a noisy street so I don't usually want to do that, if I open a window at the back and keep internal doors open it will stay reasonable but significantly elevated. So yeah I think the lesson here is you probably need to buy a sensor, different homes are gonna d…

I think it’s just quite windy where I am combined with a not particularly airtight building so opening the window just a crack results in a lot of air blowing in

Yeah I was thinking airtightness might be the difference. My flat seems to be bizarrely hermetic (when you turn on the kitchen extractor fan, it struggles if you don't have a window open somewhere).

So maybe a few leaky cracks are enough that when you open a window you get a bit of a through-draft.

Re: The bottleneck might be the air in the room

#492

Post by bjackman »

microtonal wrote: post #121
bjackman wrote: post #103

Earlier quoted context omitted.

As a middle ground I can also recommend this unit: https://apolloautomation.com/products/air-1 Looks like it's increased in price unfortunately but I like the idea, it's basically just what you would do as a DIY project but ready built. So you can either use it like a normal commercial product, or you can just fork the ESPHome config that's on GitHub and flash it exactly like any normal ESPHome project.

Yeah, I have heard good things about them. There are some other options that are kinda in between DIY and a product, like those by Screek Workshop. https://screek.io/ https://shop.screek.io/products/sco-b No recommendation though, I haven't tried them.

Great to see there are others doing the same.

It's a extremely cool that ESPHome is able, just by existing and being good, to create this little industry of no-bullshit products. What an awesome project that is!

Re: The bottleneck might be the air in the room

#493

Post by account42 »

bloomingeek wrote: post #435
II2II wrote: post #270

Earlier quoted context omitted.

Building codes that address this are wonderful, however: - Plenty of people live or work in older buildings, where are not up to standard. For example: my office probably violates the air quality sensibilities of the Victorian era, which is when it was originally built. - Equipment breaks down, isn't operated properly, or wasn't installed correctly. Having monitors that measure air quality is an extra check. While yo…

And let's not forget unscrupulous building owners/renters who will not employ the at least 10% fresh air intake rule on their HVAC system. This fresh air is outside air temperature, so their system has to change it's temp according to the thermostat setting, which costs money.

Fresh air doesn't have to be outside temperatures as you can heat exchange most of the energy from exhaust to intake without putting in additional power.

Re: The bottleneck might be the air in the room

#494

Post by cryptonector »

throw0101a wrote: post #229
vertnerd wrote: post #186

As a high school teacher, I first noticed this effect when I started using a CO2 monitor in my classroom as a proxy for air freshness during COVID. The CO2 levels in our supposedly "no problem with the air" classrooms shot up to 2000 ppm within minutes of the start of school and stayed there all day. Kids weren't checked out ONLY because I teach mathematics. They were breathing bad air, too. Worse, when I brought the…

> The good news is that I stopped worrying about making my house "tight" for the sake of energy efficiency. I keep some windows cracked all year and don't worry about how tight the door seals are. The point of having "tight" houses is not (just) about energy efficiency but about air quality as well. The general mantra is build tight, ventilate right . It's why modern building codes mandate air tightness and having ER…

Uh, no, homes should not be airtight. You'd have a hard time closing exterior doors if they were, and anyways, houses need to be able to "breathe" to be able to keep humidity down (you don't want mold problems), oxygen up, CO2 down, etc.

Re: The bottleneck might be the air in the room

#495

Post by bloomingeek »

account42 wrote: post #493
bloomingeek wrote: post #435

Earlier quoted context omitted.

And let's not forget unscrupulous building owners/renters who will not employ the at least 10% fresh air intake rule on their HVAC system. This fresh air is outside air temperature, so their system has to change it's temp according to the thermostat setting, which costs money.

Fresh air doesn't have to be outside temperatures as you can heat exchange most of the energy from exhaust to intake without putting in additional power.

True, but the vast amount of buildings don't have this technology.

Re: The bottleneck might be the air in the room

#496

Post by GreenWatermelon »

LordDragonfang wrote: post #371
Aperocky wrote: post #80

This article is rated 100% on my AI smell meter, making it less trustworthy despite convincing arguments. For instance, I'm now really only sure that author measured a 2000 ppm CO2 in a meeting room once. Everything else could just be LLM trying to invent convincing argument.

Yeah, I clocked it as AI the moment I read "Here is the uncomfortable part". Pangram detects it as 100% AI-generated: https://www.pangram.com/history/c410d4b4-abfd-4ca0-b52d-db0d...

Myeter started tingling at "Not the people. The room." On the first paragraph, and reached maximums level at the same part as you.

Feels like I wasted time reading bullshit.

Re: The bottleneck might be the air in the room

#497

Post by GreenWatermelon »

tangenter wrote: post #419

You gather your notes about the article you’re to publish and you send them to your favorite LLM. Not your editor. Not your most helpful critic. The LLM.

And Here is the uncomfortable part: The LLM smell in your article is obvious. Not only will people notice, but they will severely denounce the article. Absolutely Shame.

Re: The bottleneck might be the air in the room

#498

Post by theshrike79 »

sarchertech wrote: post #394

If you want citations search my post history, but CO2 cognitive impact studies have a replication issue. We’ve been studying the impact of CO2 for decades, at much higher levels than you see in office buildings and have never recorded any cognitive impact (until many thousands of PPM) until the Satish study in 2012 and a handful of other studies that Satish was involved in. If you think about it for a second these st…

In these studies, are the people told that they have less CO2 in the air?

My experience is more like being slightly drunk. If you know you need to be sharp (client meeting in a meeting room with shitty air), of course you can do it.

But when you have a relaxed team meeting in the same room, the jokes start getting really bad _really_ fast after the CO2 levels start going up.

Re: The bottleneck might be the air in the room

#499

Post by esikich »

fuzzfactor wrote: post #426
esikich wrote: post #349

Earlier quoted context omitted.

Lol yes

I laugh pretty easily myself :) Of course some things are more hilarious than others :) >Cars aren't hermetically sealed I can agree with that completely. Not my downvote btw, corrective upvote instead :) Naturally I often wonder if many people know what Hermetically sealed is all about to begin with. I do a bit of that in the lab when I seal flammable reference materials inside glass ampules using a torch. But it's…

Cars are leaky as fuck. They are more leaky than your house. There is 0 potential of CO2 buildup that is anything remotely close to being harmful.
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