FAST-STAT wiring extenders eliminate the need to re-pull thermostat and condenser cables when adding or upgrading HVAC equipment. A great time saver whenadding air conditioning, converting to a heat pump, upgradingto 2-stage heating or cooling. Can be used with most thermostats,furnaces, condensers, heat pumps, PTACs & RTUs. Designed for a minimum 50-year maintenance-free service life, and comes with a lifetime warranty. Visit www.fast-stat.com, or call 800/775-4750.