ThermoPEX is flexible pre-insulated piping that is ideal for use with outdoor furnaces. ThermoPEX consists of two 1-inch* oxygen barrier Central PEX lines or two 1-1/4"** oxygen barrier PEX lines (a supply and a return) that are insulated with high-density urethane insulation and a thick, durable, waterproof polyethylene outer jacket.

ThermoPEX insulated piping saves energy and maximizes efficiency by keeping heat loss to a minimum. Greater system efficiency maximizes the delivery of heat from each pound of wood. That reduces wood consumption.

  • Easy to install - ThermoPEX is pre-assembled and ready to install
  • Can be installed even in high water table areas
  • Outer casing is UV protected for temporary above ground installations (although interior water lines are not UV protected)
  • Pipe is marked to easily identify supply and return lines

*CTS ASTM 1" supply and return

**CTS ASTM 1-1/4" supply and return

Download the ThermoPEX Brochure.