4″ x 25′ Insulated Duct – R4.2
UL 2158A duct is highly recommended for clothes dryer venting installations.
- 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
(1) – 4″ x 25′ Insulated Duct – R4.2