I hope
you can do much to remedy the poisonous air of thousands and thousands
of stove-heated rooms."
In a cold climate and wintry weather, the grand impediment to
ventilating rooms by opening doors or windows is the dangerous currents
thus produced, which are so injurious to the delicate ones that for
their sake it can not be done. Then, also, as a matter of economy, the
poor can not afford to practice a method which carries off the heat
generated by their stinted store of fuel. Even in a warm season and
climate, there are frequent periods when the air without is damp and
chilly, and yet at nearly the same temperature as that in the house.
At such times, the opening of windows often has little effect in
emptying a room of vitiated air. The ventilating-flues, such as are
used in mines, have, in such cases, but little influence; for it is
only when outside air is colder that a current can be produced within
by this method.
The most successful mode of ventilating a house is by creating a current
of warm air in a flue, into which an opening is made at both the top
and the bottom of a room, while a similar opening for outside air is
made at the opposite side of the room.
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