| Color | : | Silver |
| Duct Size | : | 20 in |
| Length | : | 25 ft |
| Material | : | Polyester |
| Pressure Rating | : | 10 in-WC |
| R-Value | : | 8 |
| Temperature Rating | : | -20 to 250 deg F |
| Vapor Transmission | : | 0.05 perm |
| Velocity Rating | : | 5500 fpm |
Gray Flex's models 4GF(R-4.2),4GF-6(R-6.0),and 4GF-8(R-8.0) are tested in accordance with U.L.181 and approved for use as a Class 1 air duct material. Jacketing is printed with certification label, foot markers, size and performance data every 24"- (Foot markers every 12"). It is jacketed with a scrim reinforced metalized polyester vapor barrier. The airtight core is our exclusive patented, reinforced inner liner. Fiberglass insulation is a minimum of 1 1/4" thick for 4GF, min. of 2" for 4GF-6, and min. of 2 5/8" for 4GF-8.
Gray Flex Duct, 20 in Duct, 25 ft Length, 10 in-WC, Polyester, R-Value: 8, 5500 fpm Velocity Rating, -20 to 250 deg F, 0.05 perm Vapor Transmission
- Exclusive Patented inner core
- Energy Efficient
- Lightweight and flexible/Installs quickly
- Compression packaged to less than 10% of its extended length for less storage and handling
- Air tight inner core to insure no fiberglass contact with the air stream
- Tear and puncture resistant scrim reinforced metalized polyester jacket
- Thick fiberglass insulation helps prevent condensation
- Data printed on the jacket for ease of inspectors and installers