3 ms·
Buy a co2 meter. You have to have windows opened for much more than 5 minutes. Aaaand you have to open them every 40 minutes, even when you sleep. Good luck wit
by zsolt224 4y ago
Buy a co2 meter. You have to have windows opened for much more than 5 minutes. Aaaand you have to open them every 40 minutes, even when you sleep. Good luck with that.
- sn9 4y agoOr you could stick a fan next to the window to increase air flow.