SHAPE
Round, rectangular, and oval are the typical filament wound construction shapes. Upon requests, shapes such as triangular and others are available.  Qualified Monoxivent staff is available for designing projects requiring non-standard construction.

DIAMETER
Duct diameters are available from 2-inch through 14-feet, and rectangular sizes as required for your projects. Monoxivent’s 824-API pre-insulated double wall duct is also available in the above ranges.

WALL THICKNESS
Duct wall thickness ranges from 1/8” to 1” (increasing in increments of 1/16”).  Wall thicknesses are available for abnormal burial depths or other special loading requirements.  Standard ductwork is furnished with the following minimum wall thickness as set forth in ASTM D 3982,PS 15-69 and SMACNA Fiberglass standard:
Diameter  Wall Thickness
2” to 18”  0.125 inches
20” to 36”  0.187 inches
38” to 60”  0.250 inches

LENGTHS
Duct sections will be shop fabricated to minimize the number of field joints.

FITTINGS
Standard fittings included:
Elbows, Tees, Laterals, Y’s, Reducers, Dampers, Registers, Boxes, Square-to-Rounds, Crosses, Flanges.

COLORS
A  range of colors is available for overhead exposed applications.  Please contact Monoxivent for charts.

SINGLE WALL (any configuration available)
Our Class 1 rated single wall duct, meets 25/50 flame/smoke requirements of UL 181.  Monoxivent UnderDuct 824 Low Smoke has been accepted for HVAC and occupied Industrial areas. It is an excellent choice for corrosive environments where flame and smoke development are a concern, such as laboratories and swimming pools.

DOUBLE WALL (any configuration available)
Double wall Monoxivent UnderDuct will eliminate any thermal losses and save time and money compared to insulating on site. When supplied with the standard 1” insulation, the duct has a k factor of 0.16 and an R value of 6. Also available in R-10, R-14 by request.