Ducting 4" 1100 S Black Core - Thermoflo

Benefits of Thermoflo Black Core 4" Ducting 1100S

• Manufactured with 2-ply laminate commercial grade casing & double sealed core
• Galvanized spring steel helix maintains duct shape and prevents rust
• Oversized to fit easily onto connectors and fans
• Materials are flame resistant and comply with NFPA standards 90A & 90B
• Made in North America with strict quality controls
• Available in 25’