4 DOUBLE WALL TEE

4" DOUBLE WALL TEE is a 4-inch double-wall duct/vent tee fitting used to branch or combine airflow in venting systems while maintaining insulation or heat separation between walls.

🔧 What it is

• Size: 4 inch
• Type: Tee fitting (T-branch)
• Construction: Double-wall (inner liner + outer jacket)
• Material: typically galvanized steel or aluminum insulated ducting system

⚙️ What it does

• Splits or combines airflow in a 4" duct system
• Maintains a sealed, insulated air path
• Reduces:
  • Heat loss
  • Condensation
  • Noise transfer

$Q = A \cdot v$

🧱 Key features

• Inner duct + outer protective wall (double-wall construction)
• Helps maintain temperature of moving air or exhaust
• Provides structural rigidity vs single-wall duct
• Slip-fit or gasketed connections depending on system
• Often used with HVAC or vent pipe systems requiring insulation

🏗️ Typical applications

• HVAC ductwork systems
• Commercial exhaust ventilation
• Dryer or appliance venting (insulated runs)
• Mechanical room air distribution
• Industrial exhaust or intake systems