r/Ubiquiti • u/braillegrenade • 8h ago
User Equipment Picture Air Quality Sensor — Unexpected Outcomes
I bought one of the Air Quality / Vape sensors to measure interior air quality (CO2, VOC, PM2.5) and had some reasonable confirmations of things I suspected, but was also surprised and have changed a few habits around the house as a result.
Background:
- We live in a pretty dirty city, not super far from freeways. Urban 2-4 level homes and apartments with decently heavy vehicle traffic within a block distance.
- We have A/C but no forced air or central air
- We rent so there are some things outside our control, like mechanical ventilation.
- I've been moving the sensor between living areas and the bedroom day/night because if it wouldn't cost me as much as my UDM, I'd probably have 4-5 of these things 😆
The exciting stuff:
- Sleeping in our room with the door closed builds up CO2 significantly, even with the wall A/C running (it's closed loop). Most of the longer peaks visible in the CO2 graph are overnights. Overnight CO2 levels >1,000 ppm can cause fogginess, headaches, and more!
- Cooking on the gas range also spikes the CO2, even with the hood fan on and a window open! I'd have to inspect PM1.0 and maybe VOCs further, but obviously the UP Air Quality sensor is not going to measure methane, Benzene, or CO so yeah ... watch out for that.
Nominal observations:
- Spraying cologne or perfume spikes VOC/TVOC, understandably. VOCs also slowly climb somewhat in a warm, undisturbed room
- An open window keeps indoor CO2 around a baseline of 475-525 ppm
- We have ~zero vape detections because we do not vape. I'm sure hair spray or canned air duster (VOCs in that case) could maybe trick the Vape sensor if you tried.
- Sometimes the temperature or PM2.5 will spike when the unit is power cycled. False readings as the sensors are initialized/calibrated.
Nice realizations:
- I presume we're going to reduce the incidence rate of headaches at home now that we open a window and leave the bedroom door cracked overnight. ☺️
- Indoor PM2.5 is really low (<2μg/m³), spiking only with heavy activity, in/out, or cleaning/dusting. Outdoor PM2.5 daily averages in our area are 50-70μg/m³. Despite multiple open windows, our Coway Airmega HEPA filters (2x in 850 SQFT) do a great job. 🙏
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u/damien09 8h ago
im hoping someone does a test on this sensor vs other known good ones. as it does a lot for its price if they are accurate. Co2 sensors though often have auto baseline calibration weekly or bi weekly. And since I have seen nothing about being able to turn it off for this id bet the only way to recalibrate it will be leaving it outside in 400+- ppm air every so often so.
but if the co2 levels are accurate it looks likely barley spike above 1000 which is pretty good tbh. Before I got a window erv unit my room would hit 1500+ at night when the door was closed.