M-Ke Thermaflex Flexible Hvac Duct - 4 Inch Diameter R8 0582-0400-0001-10

Thermaflex m-ke hvac ducts have a vinyl coated spring steel wire coil construction that is ideal for low medium pressure heating and cooling environments. These highly efficient flex ducts feature a core that is bonded to the steel wire coil to support the fiberglass insulation. Duct insulation is available in three different r-values for varied thickness r-4.2 r-6.0 and r-8.0. The acoustically rated polyethylene inner liner on these hvac ducts eliminates noise and easily expands. Spiral ducts are mold and mildew resistant. Temperature range is from -20f to 200f and -20f to 250f intermittent. Inner core is self-extinguishing. Ducts measure 4-20" in diameter. Greenguard certified. 10 year limited warranty.

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