Lomanco BIB12 12 Inch Turbine Roof Ventilator Mill Aluminum

Product Description

The LOMANCO BIB12 is a 12-inch turbine ventilator designed for residential and light commercial roof ventilation. Built from mill aluminum, it resists rust and corrosion without paint or coatings. The turbine spins with natural wind movement to continuously exhaust heat and moisture from the attic space, reducing thermal load on the structure below. Permanently lubricated upper and lower bearings eliminate the need for field maintenance after installation. The rigid spider-type internal brace structure keeps the turbine true under wind load and over time. Roofing contractors and HVAC technicians install this unit as part of a balanced attic ventilation system.

The BIB12 is suited for residential attic ventilation on roofs with pitches up to 12 over 12. The vari-pitch base adjusts to match the roof slope without cutting additional material or fabricating custom flashing. The large flashing footprint provides a broad seal against weather infiltration at the roof deck penetration. This ventilator is appropriate for new construction installs and replacement of failed or undersized turbine units on existing structures where a 12-inch throat size is specified.

Key Features

• 12-inch turbine throat diameter for high-volume passive exhaust ventilation
• Mill aluminum construction — rust-free with no surface coating to chip or peel
• Permanently lubricated upper and lower bearings — no maintenance required after install
• Rigid spider-type internal brace structure maintains roundness and balance under load
• Vari-pitch base adjusts to roof pitches up to 12 over 12
• Large flashing included for a weather-tight roof deck seal
• Lifetime manufacturer warranty

Compatibility

Designed as a direct-install turbine ventilator for residential and light commercial sloped roofs requiring a 12-inch turbine unit with an adjustable-pitch base.

Installation Notes

Installation is performed by roofing contractors or qualified HVAC technicians following local building code requirements for attic ventilation. The roof deck penetration should be cut to the turbine throat diameter and the flashing set in roofing mastic before fastening to the deck. Adjust the vari-pitch base to match the roof slope before securing the unit. Always install turbine ventilators as part of a balanced system that includes adequate soffit intake area to prevent negative-pressure draw through unintended pathways.

Technical Specifications

• Throat Diameter: 12 inches
• Material: Mill Aluminum
• Bearing Type: Permanently lubricated upper and lower bearings
• Maximum Roof Pitch: 12 over 12
• Weight: 6.35 pounds
• Package Quantity: 1
• Warranty: Lifetime manufacturer warranty

Standard Information

• Brand: LOMANCO
• Manufacturer Part Number: BIB12