News and citizen. [volume] (Morrisville, Vt. ;) 1881-current, 1889-12-12
Ventilation.

1t stands to reason that good ven
tilation= cannOt.zb ezasesured in any
building against nature, without an
adequate force to overcome nature.
That is
/. To get a gallon of good air into
a box you must take a gallon of bad
air out; for action and reaction are
equal, and you can neither create a
vacuum nor condense good air with
out a good deal of force. Put two
tubes of good size in building side
by side, forexample, with equal open
ings outside and in, and a candle will
always draw into one and blow out
of the other; but if the openings are
of unequal size, there will be only fit
full drawing" either way.
2 You can neither warm nor ven
tilate well against the wind; e. g, if
YOU havea furnace, and in connection
with it a cold-air-draft opening on the
south to the outdoor air, and q ''ven-
tilator' (sO-called) in the ceiling at
the north end of the room, the cold
air will seek to come in at the ven
tilator and go out at the cOld-air
draft if the wind is in the north; and
what heat stays in the room in such
conditions, will seek the south end OF
the room, sure.
3. Warm air rises, we know, butwe
do not always remember that the
most vitiated air is heavy, and falls
with the colder air to the floor, and
fills up the room until it reaches the
breathing apparatus of an audience.
Hence the best ventilation should
take the cold air from the farthest
corner of the floor, and the fresh air
should be warmed as it comes in.
4. To take the Initiated air from
the floor, we must have a good
draught upon it, somehow.
Now apply this-to the Morrisville
town hall, for instance =
Let the cold air be drawn from the
outside of the building, always on the
side of the prevailing wind lie, there
must be two opposite cold-air-drafts,
one to be open and the other shut.
Let that air come in under the fur
naees, Let the furnaces be sheathed
with galvanized iron, so that by
natural draught as the air passes up,
it will get warmed before it pOurs
out into the room at the top of said
sheath. Then current of warm
fresh air will be constantly diffusing
So much for ingress. For egress, we
must have a sheath upon the CHM
ney or the upper part of the stove
pipe that will, by means of the vast
ing heat, create a draught for the
ventilating fiue. 1t would be better
to have a wide chimney with three
divisions in it, the middle one to be
carried up highest above the roof,
and to be used for ventilation, while
the draught is created by the two
outside ones, warmed by the escap-
ing heat of the two furnaces. Or,
better still, double chimney on each
side of the hall, one tiue for fire and
the other for ventilation; but the
ventilator must contain the same
number of square inches in the size of
a section of its tube as the cOld-air-
draft in use at the time.
Let the mouth of the ventilatOr be
in the floor, away from the stove,
and if necessary run along the side of
the room to the ventilating chimney.
Then there will be harmless motion
throughout the entire air of the
building, ndgood twill make hap
Ply and appreciative audiences. At
present the furnace is heating the
Initiated air at the floor, heaving it
up and passing it.around again, "ad
nauseam.
The writer of this has had to do
with various schOol-houses, and the
building of three churches, in the last
of which, by obeying the above rules,
there was a marked success in getting
warm fresh air in abundance In the
search for the above truths, various
draughts were tried in all sorts of
ways, with handfuls of fine-cut tissue
paper of different cOlors, until the
ways of furnace heat and other kinds
of air were hunted out, and the build
ers learned to govern themselves &C
cordingly. P. F.