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Jayme Hoffman
@jayme
The cost of CO2 monitors have dropped from $2K+ in the 90s to $10 The Aranet4 is 40% off right now for $149
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Mark Fishman
@markfishman
There’s no way the $10 work reliably
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Jayme Hoffman
@jayme
Temu reviews are good Amazon one doesn't look great
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