Thermostat Brief introduction to the thermostats in Molecular dyanmics C-wire C-wire adapter or fast-stat common maker is necessary if the current wiring doesn’t have C (common) wire. https://shop.meross.com/products/cwire-adapter-mca100 https://www.amazon.com/Fast-STAT-Common-Maker-Popular-Thermostats/dp/B07G2NGFKH/