4″ x 25′ Insulated Duct – R4.2 – Item #2574

These insulated ducts are UL181 and approved for use as a Class 1 air duct.

• R4.2 fiberglass insulation for improved energy efficiency
• Can be used in supply, return and standard exhaust applications
• Not for use in kitchen hood exhaust systems
• Consult your local building codes

Product Contains:
(1) – 4″ x 25′ Insulated Duct – R4.2