Air Flow Vent
*Easily Installed On All Bins By One Person
*A Neccessity for all Drying Bins
*Low Price
SA-870- 8" x 8" Roof Vents 70 degrees
SA-1270- 12" x 12" Roof Vents 70 degree
SA-1570- 15" x 15" Roof Vents 70 & 90 degrees
SA-1570PS - 15" x 15" Roof Vents 70 & 90 degress
SA-1890- 18" x 18" Roof Vents 90 degrees
SA-71- Extra Roof Vent Base Piece
SA-72- Kit to put roof vent on bin (includes 
bolts, nuts, caulking for one vent)
bolts, nuts, caulking for one vent) *Base Easily Removed
*Lock Seam Joints
*Bird Proof Screen
*100% Galvanized to withstand years of weather conditions.
*Holes Symmetrically Punched
*Double Edges For Extra Strength
*Heavy Angle Base
POWERED ROOF VENTS
SA-1270- Powered Roof Vent
1. Lightweight (67 lbs)
2. Only 15" x 15" space needed on bin roof so that can be mounted fairly close to peak of bin to remove moist air out of peak & top of bin.
3.Has 12" Aeration Fan to pull moist air out of top of bin (plug enclosed)
4. Can be shipped totally assembled (in two boxes) by UPS.
5. Installed like a regular roof vent & mounting the fan to underside of roof sheet.
6. Economical to purchase & operate
Locate Vent on the desired roof sheet. Slide Vent up the roof sheet (toward the small end) until the corner of base intersect roof sheet ribs.
Using the base as a template, mark and drill the (12) 11/32" diameter mounting holes.
Cut the opening to the proper size. Preferably use either a saber saw, nibbler, or tin snips.
Apply 2 beads of butyl sealant as shown, between the vent base and roof sheet. Leave a 1" gap at the lower side of the outside bead.
Assemble vent to roof sheet using 5/16" x 3/4" hex bolts and nuts. Tighten all bolts and check sealant along upper end of vent base for any gaps or pockets.
Apply extra sealant as required.
DO NOT WELD-unit to roof or rusting will occur.
VERY IMPORTANT- Caulk vent to bin roof when installing and yearly for prevention of leakage.
SPREAD-ALL MFG
Roof Vents
Five Models Available
70 & 90
Elbow Vent Assembly
Apply 2 bead of butyl sealant as shown between vent base and roof sheet.
Leave a 1" gap at the lower side of the outer bead.
70 Degree
90 Degree
NEW!
15" Pivot Screen Roof Vent
*Available in 70 and 90 degree!
