My split system central AC just went in. My installer/friend used an Aprilaire 8600 T-Stat. He's had great luck with those. They make an optional Outdoor temperature sensor (add-on) that I would like to install : http://estore.aprilaire.com/catalog/...fier-parts/291
What type of Wire can I use with this as I'll need to splice it to extend the cable back to to the T-Stat.