Thermwell VP67 Large Rectangle Vent Plug 6.50 X 7.75 Inches

Product Description

The THERMWELL VP67 is a large rectangular vent plug designed to seal foundation vents in basements and crawl spaces. It blocks cold air infiltration and wind-driven drafts during seasonal shutdowns or winter weatherization work. Measuring 6.50 inches by 7.75 inches, the VP67 provides a snug fit for standard large rectangular foundation vent openings. This type of plug is typically installed by HVAC technicians, insulation contractors, or knowledgeable property maintenance personnel as part of a building envelope air-sealing program.

The VP67 is suited for residential and light-commercial applications where foundation vents need to be temporarily or seasonally blocked. Typical install locations include poured-concrete or block-foundation perimeter vents in unconditioned basements and crawl spaces. The rectangular profile matches the most common large foundation vent frame dimensions found in residential construction. Each package contains 8 plugs, making it practical for whole-foundation sealing in a single visit.

Key Features

• Rectangle profile measuring 6.50 inches by 7.75 inches fits standard large foundation vent openings
• Blocks cold air infiltration and wind penetration through basement and crawl space vents
• Package quantity of 8 plugs per unit supports full-perimeter foundation sealing
• Lightweight construction at 1.7 pounds per package for easy transport and handling on the job
• Designed for seasonal installation and removal without permanent modification to the vent frame

Compatibility

Designed as an OEM-style replacement and general-use fit for standard large rectangular foundation vent openings commonly found in residential basement and crawl space construction.

Installation Notes

Foundation vent plugs are typically installed by HVAC technicians or general contractors during seasonal weatherization. Before installation, inspect the vent frame for damage, debris, or existing seals that may affect fit. No special tools are required, but ensure the vent opening dimensions match the plug size prior to installation. Remove plugs in spring or as required by local ventilation codes to restore proper foundation ventilation.