The Miller press. [volume] (Miller, S.D.) 190?-current, 1923-03-08
CATECHISM ON HOG HOUSE VEN.
TILAT1ON
BY Ralph L. Patty.

BY Ralph L. Patty.
Cues. Is ventilation needed in a
hog house built with ordinary single
board walls? Ans. Not often.
@. Is ventilation needed in a tightly
built masonry wall or double board
wall hog house? A. Very badly.
@. Will frost bother on a solid wall
more than on one with Gead air space?
A. Yes. The less the connection be-
tween the inside and outside OF the
masonry wall the less the frost.
@. Will ventilation prevent frost in
hog houses? A. 1t will not. ventila-
ton takes out the excess moisture and
helps control, but will not prevent
some deposit of frost until the walls
and ceiling are doubled.
@. Will ventilation control the frost
to a point that is satisfactory without
doubling the ceiling? A. 1t will. II
the overhead space in the hog house
is not too great and enough hogs are
kept i'm the house so as to keep the
temperature up.
O.. Are there demonstration houses
over the state to show shis? Ans.
There are.
O.. Why must the temperature in
the house be kept up in order to con-
troll the frost? A. Because cold air
won't hold the moisture, coming from
the hogs, breath, in suspension long
enough &c carry Il GU. through the
foul air ducts.
@. Does II pay to build warm double
walls and then ventilate the house?
A. Yes. Because the air Is then fresh
without any draft and, by regulating
the hampers, the temperature can be
kept up to a point where the frost will
not be a nuisance.
@. Should all intake and out-take
ducts be fitted with hampers to cut
down the circulation? A. Yes.
@. Why? A. Because these pipes
or ducts should be large enough to
supply fresh air for the house crowded
with hogs. Only on special occasion
will you need the pipes openwide.
@. When will the hampers need to
be carefully regulated? A. When
there are only a few hogs in the house
such as at narrowing time; when the
air is very cold outside (because this
air will flow into the house under
much higher velocity, therefore, the
openings should not be- so large) (;
when the wind pressure is strong.
@. What type of centralized far
rowing house is best for controlling
frost? A. A type with low overhead
space and not over an S-foot alley.
The side walls should be doubled with
an air space, and il very particular
double the ceiling, windows and doors.
@. Do fresh air ducts have to be
~Insuiatedf A. No.
@. Do foul air ducts have to be
insulated? A. Only when they go
through the haymow.
q. When does frost bother worst?
A. In extremely cold weather.
@. Is it wei advisable to close the
system entirely? Yes, for a short time
especially il there are not enough hogs
in the house.
@. Does some fresh air come
through double walls? A. . Yes. Pos
sibly one-fourth OF the required
amount.
O.. How near the floor should the
foul cir ducts extend? A. From Is
to As inches. Tests do not show any
difference in air flow but there is
possibly a slight advantage in build
ing them closer to the floor when the
space is available.
@. How much lumber does it take
to build the foul air ducts? A. Each
pair Of IL inch ducts will take $50
feet of No. / White Pine lumber. A
60-foot house should have three pairs
Of these.
@. Should a hog house be built as
warm as practicable IL II is to be ven
80 "a A..
the better the frost can be controlled.
@. Is a double wall with dead air
space better than a double wall with
out a air space? A. Yes.
@. What other advantage does ven-
t~ilation have besides furnishing fresh
air without draft" and helping to
| control frost?" A. II keeps the tenn
perature from extreme changes within
the house. A house that gets too hot
is more dangerous than m that gets
too cold.
Z. III. Aicher,
County Agent.