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NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Attic Insulation Shield
In some areas, the building code requires
the use of an attic insulation shield (AVS) on
single-story Type B-W installations.
Model BVO Attic Insulation Shield attaches to
the top surface of the ceiling plate where oval
wall-heater vent enters the attic. The shield
prevents mass-type insulation (rock-wool,
vermiculite, etc.) from filling or obstructing
the ventilated stud space ablove the heater.
Fold along perforations into rectangular
shape with spacer beads on inside.
STEP 1:
STEP 2:
Lock by bending tabs outward. Be sure small
flap is on outside as shown.
Bend end flanges out along perforations to fit
type of constructions (see above).
STEP 3:
Rectangular end flanges (A) are bent along
perforations to fit 2” x 4”, 2” x 6” or 2” x 8”
jjoists as required. Make sure bottom edge
of shield rests on or overlaps ceiling plate
spacers.
STEP 4:
CEILING PLATE
SPACERS
Locking of Joints
1. Place female coupler
over preceding male
coupler.
2. Press side of pipe
down until joint seats.
3. Press other side of
pipe down until joint is
engaged.
1. Insert screwdriver
one inch into joint as
shown.
2. Press firmly inward
with blade of screwdriver
and pry upwards VERY
SLOWLY AND GENTLY.
Joint will slowly separate
without damage.
Unlocking of Joints
