Part of the TED50 line, the TED50V and TED50VXT are low-leak, thermally efficient dampers with insulated extruded-aluminum vertical blades. Designed for reliable performance in cold temperatures, each blade has a thermal break strategically placed between twin-blade edge seals. This creates a neutral zone that eliminates thermal transfer and reduces the potential for condensation. The TED50V uses Ruskiprene blade and jamb seal material. The TED50VXT is designed to protect against extreme cold temperature conditions by using mechanically fastened extruded silicone on the blade seals and ribbed-extruded silicone on the jamb seals.