#535 Sealed Insulated Box
#535 Sealed Insulated Box
Features:
- High performance closed cell polyurethane foam molded around the box for insulation and sealing
- Patent-pending “Crush Ribs” reliably seal duct to register box without tapes or mastics
- Patent-pending sealing feature between box and drywall
- Fold away flanges, allowing for flexible retrofit box replacement
- Cold temperature installation down to 0°F
- Internal debris cover protects box interior during rough-in construction
- Debris cover 2D barcode provides access to installation instructions and product specifications
Test Compliance:
- UL 2043 – Fire Test for Heat and Visible Smoke Release
- ASTM C518 – R8 Thermal Resistance After 90 Day Aging
- ASTM C411 – Hot Surface Performance of High Temperature Thermal Insulation
- UL181B – Tensile strength of flex duct connection using listed mechanical connectors
- Air Leakage at 0.2” H2O pressure using typical installation practices: 535 Box – 0.8 SCFH vs. traditional insulated box @ 70 SCFH
