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Convection Tubing 4 mil

  • This item can take up to 10-14 business days to ship.  Please plan accordingly.

    This item ships to the lower 48 states ONLY, there is no international shipping available.

    This item is sold by the foot. Please enter the desired length in the quantity section.


    4  mil Convection Tubing is ideal for cooling greenhouses, uniform dispersion of heat from a force hot-air furnace, for improved mixing of air in greenhouses, and so much more. Ken-Bar's poly convection tubing is available in 4 & 6 mil. The polyethylene is clear and is protected with a strong ultraviolet inhibitor. The formulation of the plastic is designed for maximum light penetration and for durability in a greenhouse environment.

    Ken-Bar provides proper diameter holes and spacing that conform to the fan manufacturer's specifications. A properly designed tube will make full use of the fan's output by distributing air evenly down the length of the greenhouse. Punch position can be varied as shown below to provide the best possible airflow for each situation.

    Guarantee - Each tube is guaranteed to support the cubic feet/minute output of the fan. If there is a problem, the tubing will be replaced immediately.  The 4-mil tubing is guaranteed for 1 year.

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