Get smarter ducting today! Our 4-inch R4.2 insulated flexible duct is fire-safe, energy-efficient, and performs flawlessly. Plus, it comes with free equipment to make installation easy! WHY THIS IS THE BEST OPTION FOR YOU: Military-Grade Fire Protection: Two layers...

This product offers the best resilience to heat and fire.Owens Corning® R6 fiberglass (UL 181 and ASTM E84 approved) and two layers of aluminum make up this product.It can manage temperatures from -30°F to...

This product offers the best resilience to heat and fire.Owens Corning® R6 fiberglass (UL 181 and ASTM E84 approved) and two layers of aluminum make up this product.It can manage temperatures from -30°F to...