Prof. Jose-Luis Jimenez on Twitter: "13/ How to know that VENTILATION IS GOOD ENOUGH? Measure CO2 with an infrared meter (NDIR, ~$100). Keep it below 700-800 ppm (parts per million) See section
Freezer UPO - PS Auction - We value the future - Largest in net auctions
Freezer UPO - PS Auction - We value the future - Largest in net auctions