Ducting, Lay Flat

Allegro 9500-500 Lay Flat Ventilation Ducting — 500 ft Clear Polyethylene Duct for Confined Space Airflow

The Allegro 9500-500 is a 500-foot roll of lay flat ventilation ducting manufactured from clear polyethylene, engineered for maximum elasticity, flexibility, toughness, and resistance to splitting and tearing. Designed for contractors and trades professionals working in construction, industrial, manufacturing, and confined space environments, it delivers large volumes of forced air to areas where permanent ductwork is impractical. The tubing collapses flat when airflow stops, making storage and transport straightforward on active job sites. It is not intended for permanent installations.

Technical Specifications

Available Items

Unlike rigid or semi-rigid duct systems, this lay flat polyethylene tubing collapses completely when not in use, reducing storage footprint and simplifying transport between job sites. Its clear construction allows visual confirmation of airflow and debris, and multiple sizes are available to match different blower diameters, giving contractors flexibility across varying project requirements.

Key Features & Benefits

Engineered Durability

Manufactured from clear polyethylene specifically engineered for maximum elasticity, flexibility, toughness, and resistance to splitting and tearing. This construction holds up to the repeated deployment and retrieval cycles common on active job sites without degrading prematurely.

Collapses When Airflow Stops

The lay flat design means the duct collapses flat when the blower is off, making it easy to roll up, store, and move. This is a practical advantage on confined space and renovation projects where space is at a premium.

Moisture and Chemical Resistance

The polyethylene material is unaffected by moisture and most chemicals, making it suitable for water restoration projects and environments where chemical exposure is a concern. This resistance extends the usable life of the duct across a wide range of job site conditions.

Resistant to Bacterial and Fungal Growth

The material resists bacterial and fungal growth, making it suitable for use in food preparation areas and other hygiene-sensitive environments. Contractors working in food processing facilities or post-flood remediation can deploy this duct without introducing contamination risk.

Wide Temperature Range

Rated for use from 41°F to 150°F (5°C to 65°C), this ducting performs reliably across a broad range of ambient conditions. It is appropriate for both cold-weather construction sites and warmer industrial environments.

500-Foot Length

At 500 feet (152.4 m) per roll, a single unit provides enough reach to ventilate deep confined spaces, long corridors, or large open areas without splicing multiple sections. This reduces setup time and the number of connections that could leak air.

Common Applications

Confined Space Ventilation

Delivers forced air deep into manholes, tanks, tunnels, and other confined spaces where workers require fresh air supply or hazardous fume extraction.

Water Restoration Projects

Directs high-volume airflow into water-damaged structures to accelerate drying, and its moisture resistance ensures the duct itself is unaffected by the wet environment.

Building Renovations

Provides temporary ventilation during interior demolition, painting, or finishing work where dust, fumes, or particulates must be exhausted from enclosed areas.

Industrial and Manufacturing Environments

Channels fresh air or exhausts process fumes in factories and manufacturing facilities where permanent ductwork is absent or insufficient for temporary operations.

Compatible Materials

• Clear polyethylene construction — unaffected by moisture
• Resistant to most chemicals
• Resistant to bacterial and fungal growth
• Suitable for food preparation area environments

Frequently Asked Questions

Q: What blower size does the 9500-500 fit?
A: The 9500-500 fits blowers up to 14" in diameter. For 16" and 20" blowers, use the 9600-500.

Q: Can this ducting be used in wet or flood-damaged environments?
A: Yes. The clear polyethylene material is unaffected by moisture, making it appropriate for water restoration projects and other wet job site conditions.

Q: Is this duct suitable for permanent installation?
A: No. This product is designed for temporary applications only and is not intended for permanent installations.

Q: What happens to the duct when the blower is turned off?
A: The duct collapses flat when airflow stops, allowing it to be easily rolled up and stored or transported.

Q: What blower brand is recommended for use with this ducting?
A: Allegro recommends pairing this ducting with an Allegro blower for optimal performance.