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How many strand t-stat wire?
I just had my old oil fired hot air furnace replaced with a new oil furnace with an ECM variable speed fan (if that matters). I currently have a 2 strand t-stat wire. He's also coming back to install a heat pump and humidifier. The home has never had a heat pump/central air system or humidifier prior. I'm a low voltage electrician and would prefer running the wire myself. My 2 questions are...How many strand t-stat wire would I need for a duel fuel central air system with a humidifier? (oil warm air furnace with humidifier, heat pump, & ac) He said "probably" 7, but I didn't feel confident of his answer. Second, How would I run the cable for him? Currently my wire runs directly from furnace to t-stat. Would I run 1 t-stat to furnace, 1 from furnace to humidifier on return, and 1 furnace to heat pump? Or 1 continuous run? Thank you for the help. A licensed contractor is doing the installation of the equipment and termination of the wires. I just want to have it in place for him for both cost and time savings.