Upgrade to smarter ducting today! Our 12-inch R4.2 insulated flexible duct delivers fireproof safety, energy savings, and professional performance - now with FREE bonus tools to make installation a breeze! WHY THIS IS YOUR BEST CHOICE:Military-Grade Fire Protection -...

Ultimate Fire & Heat Resistance Dual-layer aluminum construction (inner/outer) + Owens Corning® R6 fiberglass (UL 181 & ASTM E84 certified). Handles extreme conditions (-30°F to 200°F) – ideal for attics, industrial exhaust, and high-heat...

Cuchiilo R8 HVAC Insulated Flexible Duct - Ultimate Fireproof & High-Temp Airflow Solution For industrial and commercial applications demanding maximum safety and thermal performance, the Cuchiilo R8 HVAC Insulated Flexible Duct sets the...