I recently moved into a house where each of the three bedrooms contained one of these:
I'm guessing it's used for ventilation. Problem is, winter is coming and I don't particularly enjoy having a cold breeze during this time of year (also, the sound from outside can be quite clear and annoying).
What's the best way to cover this up either temporarily or permanently?
Some details of my house:
- Built around 1953
- Outside is brick covered with rendering
- Living in the UK