Lomanco 730 Roof Louver 6.25 Inch Mill Aluminum

Product Description

The LOMANCO 730 is a slant-back mill aluminum roof louver designed to provide passive attic ventilation in residential roofing applications. The unit measures 12.1875 inches by 17 inches by 4 inches overall, with an 8-inch opening. Its weather-tight seamed collar and three-sided louver design work together to allow greater airflow while resisting wind-driven rain and debris infiltration. The large nailing flange simplifies deck attachment and helps create a secure, watertight seal. This louver is typically installed by roofing contractors or HVAC technicians as part of a balanced attic ventilation system.

This louver suits residential attic exhaust applications where a low-profile, slant-back profile is preferred for weather resistance. The mill aluminum finish resists corrosion in humid and coastal environments, and the louver design helps prevent roof discoloration caused by moisture and heat buildup. The 8-inch opening size accommodates standard collar sizing used in typical residential roof ventilation layouts. It is sold in a package of 6 units, making it practical for full-roof ventilation installations or multi-unit jobs.

Key Features

• Slant-back design improves weather resistance and reduces wind-driven rain infiltration
• Three-sided louver construction increases airflow compared to standard two-sided designs
• Weather-tight seamed collar forms a secure connection at the deck penetration
• Large nailing flange provides a broad fastening surface for a secure, leak-resistant install
• Mill aluminum construction resists corrosion in humid and exposed environments
• Helps prevent roof deck discoloration from heat and moisture accumulation

Compatibility

Designed as an OEM-style replacement or new-installation roof louver for residential attic ventilation systems requiring a 6.25-inch slant-back exhaust vent with an 8-inch collar opening.

Installation Notes

Installation is typically performed by a licensed roofing contractor following local building code requirements for attic ventilation. Power or HVAC connections are not required for this passive vent. Cut the roof deck opening to match the 8-inch collar diameter, seat the flange flat against the roof deck, and fasten through the nailing flange before applying roofing membrane and flashing. Do not install over active mechanical exhaust ducts without verifying that the louver rating meets the required airflow capacity.

Technical Specifications

• Overall Dimensions: 12.1875 inches x 17 inches x 4 inches
• Opening Size: 8 inches
• Pipe/Collar Size: 6.25 inches
• Material: Mill Aluminum
• Style: Slant Back
• Weight: 7 pounds
• Package Quantity: 6 per package

Standard Information

• Brand: LOMANCO
• Manufacturer Part Number: 730