Patent pending Thermaflex PHD flexible air duct is energy efficient, environmentally friendly and cost effective. Made with 100% recyclable inner core and vapor barrier, PHD is a great choice for LEED projects and applications where sustainability is key. The non-metallic construction of this versatile duct also makes it ideal for MRI and clean rooms.
|Diameter||4-20 inches ID|
|Positive||10 inches (4˝-12˝ ID)|
|Negative||1/2 inch (4˝-12˝ ID)|
|Temp. Range||-20°F – 250°F cont.|
|R-Value||R-8.0 = 2.25″, .74 lb./ft3 minimum density fiberglass blanket.|