Note 2 — I. VENTILATION AND WARMING.
Reading edition · Edition 2
Why are uninhabited rooms shut up?
The common idea as to uninhabited rooms is, that they may safely be left with doors, windows, shutters, and chimney board, all closed—hermetically sealed if possible—to keep out the dust, it is said; and that no harm will happen if the room is but opened a short hour before the inmates are put in. I have often been asked the question for uninhabited rooms—But when ought the windows to be opened? The answer is—When ought they to be shut?