The Stark County Democrat. [volume] (Canton, Ohio) 1833-1912, 1888-12-13

man Ath'rl w'fF,N $500 " " "
Nor { gu g. Of ~ burnt 1900 ui 70 poe lnuI
Ventilation Is tho replacement Of
nok,ous or Impure Oir In au apartment
mine, or enclosed space by pure fresh
mir from without, Other causes Of
lmpurIty OF air. than pulmonary and
]cltaiucous oybalntion Of mankind aud
the produclg Of combustion Of lights 100
ordinary dwolUmgB, ought 20 be- eyclud
I'd by cleanliness, proper removal OF
solid aud liquid cSgrota and attention
10 the conditions surrounding dwcl
liugB, A proper System Of ventilation
mI7' i1'o into consideration Che cubic
mace Of tho apartment or building Go
Uc ventilated, the number %. persons
ordinarily mhabitiug this space, the
character Of the building ilg cgpuNl
necessity for artificial heating number
Of lights and amount and moycmou.
of air entering,
II the amount of space Tor cacl iudJ
yldual Is 40 cubic feet, tbcn the nir
must be changed dirty times an hour
TO allow 5000 cubic feet OF air TO pas,
ln the time mentioned, This would
create au uncomfortable draught II
the space contained 1900 cubic feet,
the ais would need renewal only three
times an hour, A space Of 500 cubic
feet could be kept8upplied with pure mir
without p|crccptible movement II all
the mechanical arrangement lJg c.ang
ing the air were perfect, The Initial
space, as II 10 called, should not be less
than 800 or better 1900 cubic feet, The
air Of this space could be changed suit
GENTLY often to keep II ut is standard
Of purity without creating unnecessary
draught.
For sick persons this should be, at
least, doubled, The source Of air should
of course be capable Of yielding pure
air, and not be taken from damp cellars
or Easements or from the immediate
vicinity of sewers or drains, Nentila
ton may be accomplished either with
or without artificial means, Natural
ventilation takes place by diffusion, by
p%ernation, and In consequence of Inc.
quality Of atmospheric pressure. by
diffusion Is meant the slow and equable
entrance Of air from without and exit
from within u room through the walls
or ill.made joints without the influence
of w%ind.currents. In an occupied room
this Is insufficient 10 keep the air pure.
P~ernation means literally blowing
through. Unequal pressure obtains
when the air In the room 10 heated
above the temperature Of the external
air, either by lire, lights, or by the pres.
ence of u number Of persons In the
room; II expands and part Of II finds us
way out by various openings, and the
remaining being less dense than the
cooler external air, II enters In the same
way until the equality Of pressure IL re.
established. This Is repeated continu.
Ously. The most impure air In an 90.
cupied room Is always found near the
ceiling, the impurities being carried up.
wa,'d with the heated dir, and that the
pure air from without, being colder,
hlls the lower part Of the room. In
this way the conditions of the old
health. maxim, to keep the feet warm
and the head cool would be reversed, so
in NIL plans for natural ventilation, pro-
vision must be made to secure q grad.
ual diffusion Of the cold outside air
from above, or TO warm IL before IL
enters the room. With q large chin.
ney rs an a%spirating shaft, with llues nj
the top and bottom of the room, and
openings In the walls Of the room near
the ceiling TO admit fresh mir, sufficient
ventilation can be usually secured in
cold weather, in a room not oyercrowd.
ed. When a room Is heated by u fur.
mace, the fresh air is warmed before IL
is introduced, and the foul air escapes
through q yentilating shaft, a
ventilator in the window, or wall, or
through the numerous llsslres and
other creyices, which defect,ye carpen.
tering always leaves for tie benefit OF
the health OF the occupants.
The following rules we for the ar
rangement Of n system OF natural or ar-
ventilation.
First. The aperatnres ofentrance and
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