Summer is here. If you run the air conditioner for a long time, you can use a fresh-air fan. If you don’t have one, don’t seal the doors and windows too tightly—otherwise the carbon dioxide concentration really will increase.

View Original
This page may contain third-party content, which is provided for information purposes only (not representations/warranties) and should not be considered as an endorsement of its views by Gate, nor as financial or professional advice. See Disclaimer for details.
  • Reward
  • Comment
  • Repost
  • Share
Comment
Add a comment
Add a comment
No comments
  • Pinned