151–160 of 218 posts
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That should be outright illegal... Why do they allow equipment that deliberately lies to the user?
Why are pharmaceutical companies allowed to sell medicine that has no improvement over placebo? See phenlyephrine which is in every single OTC decongestant/cold medication
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At night you still sweat and breathe. In fact weight loss in general occurs by breathing. Your body gets energy by breaking carbon bonds, then disposes of the carbon via breathing out CO2.
There is zero way your body is losing a quarter pound at night through either process in a room at 70 degrees
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There is zero way your body is losing a quarter pound at night through either process in a room at 70 degrees
According to [0], humans exhale about 11.0L of CO2 per hour at night. 02 in, CO2 out, so we can get mols of gas with ideal gas law and mass loss with molecular weight of carbon. If I did my math right, it comes out to 53.9g over 8 hours of sleep (if you can get that much ). (Americans: 0.118 lb/night). Not quite a quarter pound but maybe closer than you thought! [0] https://onlinelibrary.wiley.com/doi/10.1111/ina.129…
For people who use Home Assistant, I've gone with DIY route with ESPHome [1] and senseair CO2 sensor. You can buy those sensors for +- 26 USD on AliExpress. Together with 5 USD, ESP32 devkit, it's mostly "solder"-n-play. Of course, I only have one of them, so I can't say if they are accurate, but I just need to know if the CO2 levels are normal (+- 400ppm) or high (+1000ppm), to open a window. I have tested it with j…
"Many indoor air quality sensor products are a scam" - https://news.ycombinator.com/item?id=33025995
I almost bought Airgradient's pre-soldered kit[1] but I went with the Airthings View Plus[2] because it came with a Radon sensor. It's pricey (US$299), but not $1000 pricey as mentioned in the article. But I think I might still get the Airgradient sensor for another room just because it's cheaper and I don't need more than one Radon sensor.
1. https://www.airgradient.com/open-airgradient/shop/#!/DIY-Pro...
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What is the difference between the indoor/outdoor kit? It seems the outdoor one contains more sensors but is less expensive? (or is this a nod to the article in some way ;)) My partner has a pottery studio with a kiln, it can get pretty smoggy in there when a firing is taking place (its unoccupied during, but it takes a while to settle afterwards), so I want to get a sensor. Are there any add-on sensors you can think…
The outdoor kit focuses on PM measurements with dual PM modules for enhanced accuracy. The indoor kit has in addition CO2 and an optional TVOC sensor. I think for a pottery studio to measure PM and VOCs is a good start (and CO2 to see how well the ventilation works).
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The outdoor kit focuses on PM measurements with dual PM modules for enhanced accuracy. The indoor kit has in addition CO2 and an optional TVOC sensor. I think for a pottery studio to measure PM and VOCs is a good start (and CO2 to see how well the ventilation works).
Have you looked into the longevity of the Plantower PM sensors outdoors? I have long wanted to have one outside but I've always been reluctant because there is a lot of pollen around where I am during the warmer months and I assumed that would clog them up fairly quickly.
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I wouldn't say it's the same. Low cost air quality measurement is difficult. PM is tricky but almost manageable with laser scattering, toxic gases at typical inquinant concentrations are almost impossible to get right with electrochemical sensors, no matter how much money you throw at them. Weight measurement is easy, they could give you precise and accurate results but most customer base doesn't understand anything…
No, they lie to cover up the cheapness and inadequacy of their flextures. "Users can't handle the truth" is a bullshit excuse and you should be ashamed for making it.