EFCO 403 Series Roto Vent for Storefront - Manual (Page 12)

SCREW SPLINE ATTACHMENT METHOD
STEP 5)
STEP 6)
Determine the location of the roto-vent. Mark the layout of the screw spline
attachment screws using the template provided with these instructions.
Drill through the open back verticals with a #18 drill (.170 dia.).
Use a butyl sealant at both
the ends of the roto-vent
meeting rail and sill member
as shown in the shaded areas.
CONT.
ATTACHMENT
PART PREPARATION &
SECTION V -
PAGE 11
#18 drill thru (.170 dia.)
clear hole for
S-100 (#8 x 1" SL.HW.SMS.)
(5 HOLES)