

Upgrade your ventilation system with the 4" TO 5" B-Vent No Height Increaser (Part Number: 4MIN5). This high-quality part is listed and tested to UL 441 standards, ensuring optimal performance. With a size range from 4" to 5", it guarantees a precise fit for your system, compatible with the L89-776 model. The aluminum flue with galvanized casing provides durability, while the positive twist lock connection ensures a secure installation.