Air Flow Products LT90 Long Turn 90 Degree Dryer Elbow

Product Description

The AIR FLOW PRODUCTS LT90 is a long-turn 90-degree elbow designed for residential and light-commercial dryer exhaust ducting. Unlike standard short-radius elbows, the long-turn geometry reduces airflow restriction through the bend, helping maintain adequate exhaust velocity over the full duct run. This fitting connects standard 4-inch round dryer duct and is installed by HVAC technicians, appliance installers, and experienced DIYers during new installations or duct rerouting work.

This elbow is suited for dryer exhaust systems where a 90-degree direction change is required and airflow efficiency must be preserved. The long-turn design is especially useful in longer duct runs where cumulative resistance from tight bends would otherwise reduce dryer performance or exceed maximum equivalent length recommendations. Typical applications include residential laundry rooms and utility spaces where the duct must navigate around walls, joists, or structural elements.

Key Features

• Long-turn radius minimizes airflow resistance compared to short-radius 90-degree fittings
• 90-degree bend accommodates direction changes in dryer exhaust duct runs
• 4-inch diameter matches standard residential dryer exhaust duct sizing
• Drop-in replacement form factor simplifies retrofits and service calls

Compatibility

Designed as an OEM-style replacement fitting for standard 4-inch residential dryer exhaust duct systems.

Installation Notes

Installation is typically performed by HVAC technicians or appliance service professionals. Disconnect and unplug the dryer from power before beginning any duct work. Secure all joints with dryer-rated foil tape or approved clamps — never use sheet-metal screws that protrude into the duct interior, as they catch lint. Local mechanical codes and manufacturer duct-length guidelines should be consulted to confirm acceptable equivalent length for the full run.

Technical Specifications

• Duct Diameter: 4 inches
• Bend Angle: 90 degrees
• Turn Type: Long Turn

Standard Information

• Brand: AIR FLOW PRODUCTS
• Manufacturer Part Number: LT90