HVAC – Indoor Air Quality (IAQ) and Carbon Dioxide (CO2)

In this video I go over the forgotten indoor air quality pest, Carbon Dioxide. Outdoor air readings are roughly in the 400ppm range. Indoors, we want to see that number below 1000ppm preferably in the 900’s or lower. I’m rocking the Testo 440 and 323 probe, a great asset to any HVAC tech’s tool bag. Happy HVACing!

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Testo 440


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The HVAC Know It All Podcast
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Check out my podcast, HVAC Know It All Podcast, on Anchor: https://anchor.fm/hvacknowitall