Recommend How To Improve Bedroom Ventilation?

[stpbear 0]

Living in the HDB and the master bedroom has window opening at side and the door to the living room (the other two sides are walls). However, at night, the bedroom doors are closed, the ventilation is very much reduced. Hence when getting up in the morning, usually feel the air in the room is not fresh at all. Not sure if this is a common problem for HDB bedrooms or just mine...

Is there any recommend way to improve bedroom ventilation (of course when the air-con is not turned on)?

Will installing an air purifier help - (I suppose it does not because the air purifier is for removing allegeric stuff/particles in the air but it does not get fresh air - am I right?)

Thanks for any suggestions/comments.

[Starscream 0]

Is your flat done up? If not can consider re-locating your MBR door in tandem with the air flow for your house windows and other rooms.

[applefreak 1]

fans?

[TYM 0]

keep the door open

[MaCe 3]

fans?

KDK fans?