F&L Johns Manville Duct Insulation Panels 1″-2″
$51.99 on Amazon.com (as of October 20, 2026, 5:15 AM EST) View details ↗
Ensure optimal thermal performance in your HVAC system with the F&L Johns Manville Duct Insulation Panel. This high‑density fiberglass board is engineered for sheet‑metal ductwork in commercial, residential, and industrial applications. Available in 1″, 1.5″ and 2″ thicknesses, the panels deliver an approximate R‑value of 6.5, helping to reduce heat loss and improve energy efficiency.
Each panel features a durable foil‑scrim kraft (FSK) facing that enhances moisture resistance, durability, and code compliance. The insulation performs reliably across a wide temperature range—from –32°F to 450°F for unfaced panels and –32°F to 150°F for faced panels—making it suitable for demanding environments. Tested and certified to meet ASTM C612, ASTM C553, UL723, NFPA 255, MIL‑I‑24244C, and additional standards, these panels provide lasting strength and support for rigid duct applications.
| Thickness | 1″ – 2″ |
|---|---|
| Panel Size | 24″×24″ or 24″×48″ |
| Density | 3 lb/ft³ |
| Approximate R‑Value | R‑6.5 |
| Operating Temperature (unfaced) | -32°F to 450°F |
| Operating Temperature (faced) | -32°F to 150°F |
