It's great to know that the tubing is protected with a strong UV inhibitor and formulated for maximum light penetration and durability in a greenhouse environment. Additionally, the guarantee that each tube will support the cubic feet-per-minute output of the fan for which it is designed and will be replaced immediately if there is a problem is reassuring.
Custom-designing the tube based on the length of the house and the diameter of the fan is a great feature that ensures optimal air distribution. It's helpful to know that the tubes are available in diameters ranging from 8" to 36" and that the 4-mil. Rolls can be up to 1500ft and 6mil. rolls can be up to 1000ft.
Finally, varying the punch position to provide the best possible airflow for each situation is a smart way to maximize the effectiveness of the tubing. Overall, your Greenhouse Poly Convection Tubes seem like a valuable solution for improving air quality and HVAC control in greenhouses and livestock barns.