Love the idea but revokation became the problem now
A few cm are enough
Mine from Amazon is accurate enough to remind me of opening the window
It still takes time for outdoor normal co2 level to reach those levels. We gain 2 co2 per year. And you can have an indoor garden
Love the idea but revokation became the problem now
A few cm are enough
Mine from Amazon is accurate enough to remind me of opening the window
It still takes time for outdoor normal co2 level to reach those levels. We gain 2 co2 per year. And you can have an indoor garden