CO2 level indoor jumps to almost 1600 ppm

• 

  dresdner

  Posted: 05.07.2024 22:20

  Modified: 18.10.2024 00:24

  Hi, 

  just received my Aranet4 Home yesterday. Very pleased about handling and settings. However, one thing disturbs me a bit:

  Trying to calibrate (leaving device outside) only brought level down to 450 ppm (we live in a big city close to a busy crossing). Once inside the room the level literally jumped to almost 1600 ppm (no heating, no one in the room, no open window, no pets or plants).

  What could be the reason for that? How to solve the issue?
  
  Thanks for your helpful advice!

  Ralf 
• 

  dresdner

  Posted: 06.07.2024 13:01

  Modified: 06.07.2024 13:03

  One day later, after manual calibration, level stays inside above 2000 (!) ppm, and even stays at these levels without any person in the room (and occasional fresh air inflow. 
  Is there something wrong with the sensor or any other reason?
• 

  aranet-techsupport

  Posted: 08.07.2024 10:26

  If the device calibrates to 450ppm outdoors, there's no reason to believe the device is not operating correctly. Please see the following post for details:

  https://forum.aranet.com/all-about-aranet4/how-to-calibrate-if-device-is-outdoors-but-co2-is-above-420ppm/
  
  As for the means how to improve the situation indoors, please see the following post:
  https://forum.aranet.com/all-about-aranet4/the-device-shows-that-co2-level-in-the-room-is-unhealthy-what-should-i-do-in-order-to-improve-the-airflow/
• 

  textiles-osprey

  Posted: 03.09.2024 22:47

  I was also shocked to see how high the levels were in my house. Pulled it out of the box and got to ~1800ppm in my home office almost immediately. But taking it outside and opening windows, etc. showed that it was reading correctly (I'm also in a 450ppm baseline city).
  
  In my experience over the last year or two, small rooms really climb fast. And cracking a window doesn't matter much. I really have to have a good cross breeze between two windows in a room to counteract just me breathing. If we close the bedroom door at night, it will peak at ~2800ppm with my partner and I in there sleeping.
  
  We have gas heat and stove in the house and 2–4 humans plus some small furry friends. When we're buttoned up in the winter, it gets pretty stuffy.

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