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The BUILDERS BEST 111706 is a J-Block vent termination fitting designed for routing dryer exhaust or similar venting through exterior walls. It features a 4-inch diameter opening with an 11-inch tail and accommodates wall thicknesses from 0.5 to 1.15 inches. The unit ships unassembled, allowing the installer to trim or adjust for a clean, flush finish against the exterior surface. Finished in white, it is suited for exterior wall applications where aesthetics matter alongside function. Licensed HVAC technicians, plumbers, and general contractors typically handle installation on residential projects.
This J-Block is designed for exterior wall penetrations on brick, siding, and stucco surfaces. The unassembled format gives the installer flexibility when fitting through varying wall depths within the 0.5 to 1.15-inch hood range. It is commonly used in residential construction and renovation projects where a dryer duct or exhaust vent needs to terminate cleanly through the building envelope without requiring a custom fabricated solution.
Designed as an OEM-style vent termination fitting for 4-inch diameter exhaust duct applications on residential exterior walls including brick, siding, and stucco surfaces.
Installation should be performed by a qualified contractor familiar with local building codes governing exterior wall penetrations and exhaust venting. Power down any connected appliance before beginning work. Seal around the penetration with an appropriate exterior-grade caulk or flashing material to prevent moisture intrusion. Follow local mechanical codes for duct termination clearances and vent cap placement.
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