TECH STUFF
SR827-612
SR831-618
Models SR827 (nom 6 x 12) and SR831 (nom 6 x 18) are universal style registers designed to conform to the radius of all spiral ductwork having a diameter of 8” and larger. Registers can be utilized in either supply or return air applications.
The brushed aluminum surface and heavy sealing gasket provides for an attractive fit and finish. The SR827 & SR831 use a “leg” design to raise the register off the surface.
These models are supplied with Phillips head sheet metal screws and a template for proper installation.




SL320
Model SL320 is an open slot style diffuser designed to fit to the radius of all spiral ductwork having a diameter of 8” and larger. The diffuser can be utilized in either supply or return air applications. This diffuser can also be installed on standard rectangular ductwork.
The smooth aluminum surface and rear sealing gasket provides for an attractive fit and finish. Integral to the design are standoffs which provide for screw locations, duct sealing and uniform spacing.
SL420
Model SL420 is an open WIDE slot style diffuser designed to fit to the radius of all spiral ductwork having a diameter of 16” and larger. The diffuser can be utilized in either supply or return air applications. This diffuser can also be installed on standard rectangular ductwork.
Like the SL320, the smooth aluminum surface and rear sealing gasket provides for an attractive fit and finish. Integral to the design are standoffs which provide for screw locations, duct sealing and uniform spacing.