Expandable from 1 to 3 feet or 2 to 5 feet, a single-wall expandable-flexible gas vent connector has been specifically designed with the contractor in mind, says the company. Model EFC creates a remarkably simple connection between the appliance and the manufacturer’s Type B gas vent with an integrated draft hood connector built into it. Along with ease of installation, the gas vent connector eliminates the need for elbows normally associated with this type of gas vent connection, saving the installer on installation time and material costs. It is available in 3- and 4-inch diameters. Its innovative compressed design allows for easy storage and handling. It has a limited lifetime warranty.