Famco sdwv4a 4 Inch Hooded Wall Vent Screen Damper Aluminum

Product Description

The FAMCO sdwv4a is a 4-inch aluminum hooded wall vent designed for exterior wall termination of residential and light-commercial ventilation systems. It combines a protective hood, an integrated screen, and a built-in damper into a single unit, allowing outward airflow while blocking backdrafts, insects, and weather when the system is idle. Fabricated from aluminum, it resists corrosion in outdoor exposure. HVAC technicians and plumbers install this fitting where dryer exhaust, bath fan, kitchen exhaust, or similar ducted systems terminate through an exterior wall.

This vent is suited for residential and light-commercial applications where a 4-inch round duct terminates at an exterior wall surface. Typical installations include bathroom exhaust fans, range hoods, dryer vents, and HRV or ERV exhaust outlets. The hooded profile deflects rain and snow away from the duct opening, and the damper closes under negative pressure or when the connected fan is off, reducing conditioned-air loss and preventing pest entry.

Key Features

• 4-inch nominal diameter fits standard round duct used in bath, kitchen, and dryer exhaust runs
• Integrated damper closes automatically when the connected fan or blower is off
• Built-in screen provides a secondary barrier against insects and debris
• Aluminum construction resists corrosion for long-term exterior exposure
• Hooded design sheds rain and snow away from the duct opening

Compatibility

Designed as an OEM-style replacement and new-installation wall vent fitting for 4-inch round duct exhaust termination in residential and light-commercial ventilation systems.

Installation Notes

Installation is typically performed by a licensed HVAC technician or plumber following local mechanical code requirements and manufacturer guidelines. Power to the connected fan or appliance must be shut off before beginning work. The wall vent should be sealed at the exterior wall penetration with an appropriate exterior-grade sealant to prevent moisture intrusion. Verify local code requirements for screen use on dryer exhaust terminations, as some jurisdictions restrict screens on dryer vents due to lint accumulation.

Technical Specifications

• Fitting Type: Wall Vent
• Size: 4 inches
• Material: Aluminum
• Box Quantity: 1

Standard Information

• Brand: FAMCO
• Manufacturer Part Number: sdwv4a