Underduct Product Information

UnderDuct by Monoxivent provides the most versatile and cost effective Underground Fiberglass Reinforced Plastic Duct (FRP) on the market. We provide a wide range of solutions for the most demanding environments to standard layouts.
UnderDuct – The better choice for underground HVAC applications.

Fiberglass Reinforced UnderDuct offers many advantages over other material choices.

Experienced Manufacturing:
Monoxivent’s manufacturing source has over 40 years of experience and is a leader in the Underslab Fiberglass Ductwork market. Monoxivent has a North America-wide network of sales representatives and a top-tier inside support crew, that provides engineering, design, sales, service, and marketing. UnderDuct is offered both as single wall and pre-insulated double wall duct to meet any ventilation needs. Monoxivent 824 Low Smoke Class 1 duct is approved for direct burial.

UnderDuct and The Competition:

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Code Approval:

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FRP - Corrosion Resistant Products

Corrosion Composites, by Monoxivent, is the leading source for corrosion resistant fiberglass reinforced plastic (FRP) fabrication. Our FRP products are used in many industrial, water, wastewater, underground, industrial/commercial and HVAC applications where corrosion is a problem.


Fiberglass Reinforced Plastic Products Are:

  • Light Weight
  • High Strength
  • Non-Conductive
  • Corrosion Resistant

Typical FRP Applications:

  • Ducts
  • Hoods
  • Stacks
  • Pipes
  • Platforms
  • Tanks
  • Scrubbers
  • Custom Items