Burlington weekly free press. [volume] (Burlington, Vt.) 1866-1928, 1919-02-27

cient for the ordinary colony house thas
Is being used as a brooder. Later, how
ever, when the chicks no longer require
artificial heat and the weather Is warm,
it is well to have the entire front ven
tilated, in which event 1t would be ad-
visable to have ventilators between all
the rafters and operate their covers as
desired.
Unless the wind blows hard from the
south, and assuming that the house
faces this direction, there is small chance
for back currents of air to enter the
ventflator. II they do enter and are OBJ
jectionable. the cover can be set almost
| tight 1t Is impossible for any rain to
drive in, even with the cover entirely
open.
INLETS FOR FRESH AIR.
Two types of inlet or supply vents
are shown One is intended for houses
that are sheathed on the inside In which
construction the two walls and the studs
become the ventlating duct, though a
similar arrangement can be obtained by
| building wooden casing or duct be-
| tween two studs of the unsheathed
house. The air is admitted under the
| house. assuming that the house is raised
from the ground, as most structures with
wooden floors are, and passes upward
between the outside wall and the inside
| sheathing, until it meets, a detecting
board that is fastened between the studs,
whereupon the air is turned inside the
house through small opening cut in
the sheathing. This inflow Of air is cons
trolled by sliding damper, which cons
ssts of small board beveled on two
edges and held loosely in place by two
cleats which are also beveled.
The opening Is made about IS inches
above the floor line. II there is danger
from rats. the opening should be covered
with small mesh wire netting. Similar
| protection should be given to all open.
| ings in brooder houses.
! In houses of single wall construction
| or where 1t is impracticable to admit
| air under the floor a wooden duct can
be built In the form of two elbows. az
shown in diagram. A small opening is
cut in the wall, around which two box
like structures are fitted-one on the OUT
side with the open end downward. the
other on the inside with the open end
upward The inside duct is then fitted
with hinged cover to control the inc
flow Of air.
STOVE-PIPE VENTILATOR'
binary stove-pipe, as shown. Two els
bows and a short length Of pipe, or. in
the case of single wall. two elbows
are the articles required. The holes in
the wall should be accurately cut with
a compass saw. so that the pine will fit
snugly The inside elbow is fitted with
a regular stove-pipe damper. which ID
operated to suit weather conditions.
So much depends upon the location,
exposure and construction of brooder
houses. together with their kinds Of
brooding appliances. that it is virtually
impossible to lay down hard and fast
, rules for the size and number OF vents
required to provide adequate fresh air.
On the average good plan Is TO- allow
one inlet yentilator Of about % square
inches area for an interior of 400 cubic
feet. This would mean an inlet opening
of by inches for house 6 feet wide,
10 feet long and 61a feet high. In addition,
of course, there must be. corresponding
outlet ventllator Of slightly greater area
than 20 square inches.
! AS a general thing two or more small
inlet vents are better than one large
vent in ,brooders of considerable size.
The small vents can be located in diff.
ferent walls to provide a more
uniform distribution of the fresh air.
One outlet or exhaust ventilator, how-
ever, can be relied upon to carry OF
E the stale air. providing it is given a cen-
trail position in the highest point of the
brooder compartment. The stpulationn
central" and highest" need be but ap-
proXimate. of course.
: tcopyright 1918 by Public Ledger Coz