Northern Wisconsin advertiser. [volume] (Wabeno, Wis.) 1898-1925, 1906-11-22
School Room Ventilation.
BY DR.. P. J. NoER. wABENo.
Continued from last week.

Continued from last week.
During cold weather the ventilating
flue will be sufficiently warmed by the
smoke pipe to furnish draft, but in
warm weather it must be warmed by
some kind of heater. 1t is therefore
well to install heater within the
chimney. 1t is absolutely necessary
that the ventilating fiues be warmed in
some manner, if we are depending on
the draft of the fiue for ventilation.
This system has been thoroughly
tested in many places, but especially in
the Red Rock Street schoolhouse of
Lynn. Mass. where repeated chemical
examinations of the AIR together with
measurements of the movement of the
air, have shown that it fulfills all san
itary demands.
In buildings warmed by central sys-
tenn, the same principles apply. Fresh
air is admitted to chamber about the
heater, where it is warmed, and then
distributed by means of ducts to the
various senoolrooms. The capacity of
the warming apparatus should always
be ample SO that the rooms can be warm
ed by large volumn OF air at COM
paratively low temperature. If the air
is raised to high temperature it is in
a measure de-vltilized. and its move
ment becomes SO rapid as to produce
uncomfortable currents in the school
rooms.
In the process of warming. the air
loses some of its moisture, and this
should be replaced by having liberal
supply of water in the warm air chamb-
er. The usual provision for this is IN
sufficient.
The Campbell furnace has met this
requirement by placing in the warm
air chamber tank holding from 2sa to
barrels of water, according to the size
of the furnace. This large volume of
water furnishes sufficient moisture, and
also serves to render the air less subject
to sudden variations of Temperature
If steam heat is to be employed, the
system known as indirect radiation
should be chosen. BY this method the
radiators are massed at one or more
points, and into the room where the
radiators are placed, fresh air is admit
ted, and warmed, ant then distributed
to the various school rooms as with a
warm air furnace
For very large buildings there can be
no question regarding the superiority
of steam heat, but for buildings OF
moderate size. the warm air furnace is
equally satisfactory. With either sys-
tenn, the fresh air must always be taken
directly from out side, and in large cit
les 1T should be taken at considerable
height, to avoid the impurities which
collect near the surface of the street.
As to the foul air exhausts, the same
principles apply, which have already
been discussed in reference to the one
room buildings, except that the larger
the exhaust fiue, the more essential it
becomes to provide it with heater, in
order to insure sufficient draft. Very
large buildings are usually supplied
with fans or blowers so that the air can
fc forced through the rooms at a def
nate rate, but for moderate sized build
l ings the warmed fue meets all require
ments.
| come now to another matter only
indirectly associated with the subject
Of ventilation-the system of dry clos
cts connected with the ventilating fiues
now in use in the aabeno School
The system is beautiful in theory and
looks well in illustrations, but observa-
tion and experience have shown it to be
exceedingly dangerous in practice. The
history of this system should of itself
lead us to question it's merits. IL was
invented some thirty years ago by Isaac
Smead of Boston, and was manufactur-
ed in the city OF Boston. After various
trials it was supposed to have died a
natural death. Recently, however, 1t
has been resmrected in Ohio by the
American Foundry and Furnace Com
pany.
The heating and ventilating features
of the system believe to be satisfact-
ory. Provision should be made. how
ever, for the addition of moisture TO the
air and the foul air exhausts should, /
think, have greater capacity. But when
there are placed in the school house
basement from one dozen to two dozen
dry closets and their vaults are connect
ed by open hues with the school royms
where our children are TO spend six
hours day, there we have condition
which, in my opinion, is too dangerous
for an enlightened community TO toler-
ate.
have here illustrations which will
give you q clear idea of the system.
The fresh air, warmed by the furnace,
passes ON to the school rooms. and the
foul air Is returned through the floor