Mar-Flex Waterproofing and Building Products presents the Vortex™ telescopic vent system. Today’s homeowner may not know how much energy they are losing in the winter by having the old one-size-fits all solutions of the past. Mar-Flex has made it easy by introducing a new telescopic vent system. The Vortex™comes in two sizes, the first for five, six, or seven inch foundation wall openings, and the second for eight, nine, and ten inch foundation openings. Mar-Flex has placed a revolutionary new turnbuckle adjuster to each side of the vent, allowing for ease of installation, while simultaneously reducing inventory and storage headaches. There’s no longer a need to keep dozens of odd-sized vents around. Vortex™adjusts to the inch allocations of each model. It is also one of the only vent systems with variable air flow control to let homeowners manually adjust their air flow as needed. This saves on energy costs, allowing the homeowner to close off the vents in the winter, or as needed. When air circulation is a priority in the home, choose a vent system that not only the customer can control, but also allows for ease of installation, like the Vortex™ vent system.