fygjam

A while ago and in another thread I mentioned I had acquired one of these. A CO2 monitor. Not being able to stop at one, I then got basically so I could compare results. They have sensors from different manufacturers. The good news is that, once stabilized, they agree with each other. Difference usually less than 10 ppm, quite often only 2-3 ppm. Anyway, today I thought I'd take the latest acquisition, an Aranet4, on a little road trip down to the shops. I first placed the unit outside to get a baseline reading and then we were off. 21/02/2024 11:28 430 21/02/2024 11:29 502 21/02/2024 11:30 872 21/02/2024 11:31 1017 21/02/2024 11:32 1093 21/02/2024 11:33 1233 21/02/2024 11:34 1395 21/02/2024 11:35 1490 21/02/2024 11:36 1547 21/02/2024 11:37 1658 21/02/2024 11:38 1806 Doesn't take long for the CO2 to start rising. It's a "family size" car, AC was on but with recirc, no fresh air vents open. The unit and associated app can export the data to a CSV file. After that it was a bit of stop and shop but then time for the return journey. 21/02/2024 12:04 1243 21/02/2024 12:05 1678 21/02/2024 12:06 1572 21/02/2024 12:07 1690 21/02/2024 12:08 1813 21/02/2024 12:09 1891 21/02/2024 12:10 1972 21/02/2024 12:11 2004 21/02/2024 12:12 2119 21/02/2024 12:13 2105 21/02/2024 12:14 2182 21/02/2024 12:15 2237 21/02/2024 12:16 2302 21/02/2024 12:17 2264 21/02/2024 12:18 2330 21/02/2024 12:19 2318 21/02/2024 12:20 2430 21/02/2024 12:21 2496 21/02/2024 12:22 2564 21/02/2024 12:23 2578 Ok. This trip was starting from a higher reading. It takes about 3-4 minutes for the unit to stabilize to the ambient conditions and I wasn't going to stand in the shopping centre carpark holding the unit above my head. You can get arrested for behaviour like that in some places. Why is this important. The levels of CO2 in the air and potential health problems are: 400 ppm: average outdoor air level. 400–1,000 ppm: typical level found in occupied spaces with good air exchange. 1,000–2,000 ppm: level associated with complaints of drowsiness and poor air. 2,000–5,000 ppm: level associated with headaches, sleepiness, and stagnant, stale, stuffy air. Poor concentration, loss of attention, increased heart rate and slight nausea may also be present. 5,000 ppm: this indicates unusual air conditions where high levels of other gases could also be present. Toxicity or oxygen deprivation could occur. This is the permissible exposure limit for daily workplace exposures. 40,000 ppm: this level is immediately harmful due to oxygen deprivation. When the weather cools down I might take a longer trip. Perhaps see how long it takes to get to 5,000 ppm and then see how much difference occurs with the fresh air vents open. Other readings. 430 ppm. Indoors, windows and doors open, a couple of fans moving the air around. 550-650 ppm. Indoors, windows and doors closed. 800 ppm. Bedroom when I wake up, windows and doors closed. Life is just a science experiment.

Don't worry, we got ya covered.

Serbia, Siberia, close enough.

Do you buy a dozen eggs by gram weight?

No point in starting a new topic. The effect of a short runway takeoff attempt.

I don't live in Pattaya, I don't even live in Thailand. Where I do live has pretty good air quality. Recent air quality from a monitoring station near where I live. The peak value is AQI 36. Of course we do have the occasional summer bushfire, the spring and autumn hazard reduction burns and the odd winter inversion. I do have an air purifier, a Samsung AX5500 although I believe that it has been superseded by the AX46. https://www.samsung.com/au/air-care/air-purifier/ax5500-air-purifier-with-3-way-air-flow-ax46bg5000gssa/ The specs are identical just some unnecessary changes to the appearance. These are expensive, not for Cheap Charlies. As Tommy Dee once posted "it's just a box, a fan and a filter element and can cost more than an air conditioner." This model is good for 60 square metres. Samsung do have other models. The more important spec as far as I'm concerned is that it can process 467 cubic metres of air per hour. I just use it in the bedroom which is probably a bit of overkill but I do breath clear fresh mountain air when I sleep. The filter system. The carbon and dust filter are bonded together and cannot be serviced. Replace when indicated on the control panel. The pre-filter collects lint and fluff and can be cleaned with a light vacuuming. I use it nightly and am still on the original filter after 3 years. In the interest of science and this post I measured the dust collecting filter. It has 105 pleats, 38mm deep and 175mm wide which by my calculations is a filtering area of just under 1.4 square metres. PS. Might be worthwhile on informing yourself on what a HEPA filter actually is and more importantly be aware that some people who don't recognise copyright might be producing fake filters. https://en.wikipedia.org/wiki/HEPA The purifier has indicators on the control panel for PM10, PM2.5 and PM1 as well as "gas". I believe the main gas found in the urban home is formaldehyde which is give off by carpets and furnishings. On the other hand a good healthy fart in the near vicinity to the unit can turn the gas indicator from blue to red for a few minutes. The unit is certainly quiet enough to use in a bedroom and being on wheels can be moved about to where it's required. Anything else you want to know just ask.

Sorry, missed you post. Yes, Perth. Same again today, currently 43.3. Roll on winter.

"Stepped on the accelerator instead of the brake"

http://cf.datawrapper.de/dduui/2/

The machine does it. Hail to the machine.

Down to 30°C tomorrow then back to the 40s for the weekend and beyond. Last rain 28th November last year.

Standard work "boots" in some parts of rural Australia.

Way to go Alfie E. Send 'em back to that cavern.

Why flying insects gather at artificial light And it's probably not what you thought unless you attributed it to the highly conserved dorsal-light-response. You can either read the research paper https://www.nature.com/articles/s41467-024-44785-3 or watch the YouTube video https://www.youtube.com/watch?v=MzLe0Zk31_U and you to will know the reason.

No, it's ...

^^^ Should have told him to use chopsticks.

^^^ So Dyson can either suck you off or give you a blow job. Versatile.

A TBH on the THB.

art-is-anal?

Ilsa: Play it once, Sam. For old times' sake. Sam: I don't know what you mean, Miss Ilsa. Ilsa: Play it, Sam. Play "As Time Goes By." Sam: Oh, I can't remember it, Miss Ilsa. I'm a little rusty on it. Ilsa: I'll hum it for you. Da-dy-da-dy-da-dum, da-dy-da-dee-da-dum... Ilsa: Sing it, Sam. Rick: You know what I want to hear. Sam: No, I don't. Rick: You played it for her, you can play it for me! Sam: Well, I don't think I can remember... Rick: If she can stand it, I can! Play it! https://www.phrases.org.uk/meanings/284700.html

I will raise @forcebwithu's Hypnagogia

As long as it was pointing in the right direction.

Day 4 of the heatwave. Don't usually reach the max temp until 2-3pm or later. Temp starts dropping tomorrow to the low to mid 30s. Then cranks back up on Wednesday. Fuk!