Cumberland Inside Tunnel Doors

Energy-Efficient Tunnel Ventilation Doors for Poultry Barns

Cumberland Inside Tunnel Doors provide a durable, insulated solution for controlling airflow in commercial poultry ventilation systems. Designed to improve fresh-air intake while reducing unwanted air leakage, these tunnel inlet doors combine lightweight construction, reliable sealing and straightforward installation.

Built with rigid laminate foam panels and aluminum-reinforced edges, Cumberland Inside Tunnel Doors offer an R-8 insulation value and a profiled rubber seal for a tight fit.

Available in 4-foot, 5-foot and 6-foot heights, these agricultural ventilation doors are designed to help poultry producers maintain controlled airflow and improve energy efficiency compared with conventional curtain inlet systems.

For poultry operations throughout Southwestern and Central Ontario, Cumberland Inside Tunnel Doors provide a practical option for new barn construction and compatible tunnel ventilation upgrades.

Key Features & Benefits

• R-8 Insulation Value: Insulated door panels help reduce heat transfer and provide improved energy efficiency compared with conventional curtain inlets.
• Lightweight Laminate Foam Construction: Rigid foam panels are designed for easier handling and installation without sacrificing structural support.
• Aluminum-Reinforced Edges: Aluminum channels along the panel edges add rigidity and help maintain the door’s structure.
• Airtight Rubber P-Seal: A profiled rubber seal helps reduce unwanted air leakage when the doors are closed.
• Fully Assembled Single Doors: Individual tunnel inlet doors arrive assembled, helping simplify installation.
• Three Height Options: Available in 4-foot, 5-foot and 6-foot heights to accommodate different barn ventilation layouts.
• Reduced Ventilation Dead Zones: Tunnel inlet door systems help address areas of limited air movement associated with conventional curtain sidewalls and curtain pockets.
• Molded Seal Runners: Molded runners on the rubber seal help with door alignment and installation.
• Galvanized Brackets: Durable galvanized hardware is designed for long service life in agricultural environments.
• Adjustable Cord Tension: Tension-bar and ratchet-style adjustment options help maintain reliable door sealing as operating cords stretch over time.
• Low-Maintenance Design: Lightweight panels and straightforward operating components support dependable day-to-day operation.
• Tunnel Ventilation Compatibility: Designed for use as part of a properly sized poultry tunnel ventilation system.

How Cumberland Inside Tunnel Doors Work

Cumberland Inside Tunnel Doors regulate the entry of fresh outside air into a poultry barn during tunnel ventilation.

Step 1 — Tunnel Ventilation Is Activated

When the building requires increased ventilation, the tunnel ventilation system operates its exhaust fans and opens the appropriate inlet doors.

Step 2 — Fresh Air Enters Through the Inlet Openings

The open doors provide the intake area needed for outside air to enter the building.

Step 3 — Air Moves Through the Barn

Exhaust fans draw incoming air along the length of the building, creating the airflow associated with tunnel ventilation.

This airflow can help reduce stagnant areas and improve air movement around the birds when the system is correctly designed.

Step 4 — The Doors Close When Required

When tunnel ventilation is reduced or no longer required, the doors close against their rubber seals.

The insulated panels help limit unwanted heat transfer, while the seals reduce air leakage.

Step 5 — Door Tension Can Be Adjusted

The operating cords may stretch with continued use.

Cumberland offers tension-bar and ratchet-style cord adjusters to help maintain proper closure and a reliable seal.

Contact County Line Equipment to learn more about Cumberland Inside Tunnel Doors and discuss tunnel ventilation solutions for your poultry barn in Southwestern and Central Ontario.