Originally posted by MarillionFan
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My house is about 60 years old and doesn't have any vents build into the walls. If I sleep with the windows closed and the door is shut, the room gets very stuffy and I have a terrible nights sleep.
Just by opening one of the small windows a fraction, enough fresh air enters the room to replace the used air and I generally wake up feeling fresh(er) in the morning.
Reading around on the interweb, I think you need something like 10L/s/person (dont quote me on that) of air replacement.
The difficulty is in the winter when I dont want to freeze overnight but know I need to keep a window open.



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