![My existing thermostat is heat only (gas boiler) and has a 2-wire connection. To install a C-Wire ecobee support said to purchase a Fast-Stat Common Maker for each zone (makes sense), but My existing thermostat is heat only (gas boiler) and has a 2-wire connection. To install a C-Wire ecobee support said to purchase a Fast-Stat Common Maker for each zone (makes sense), but](https://preview.redd.it/my-existing-thermostat-is-heat-only-gas-boiler-and-has-a-2-v0-b9xnwbr3rtka1.jpg?width=899&format=pjpg&auto=webp&s=5424e38d9348a13d60a1433d3b435b4a1ba877e7)
My existing thermostat is heat only (gas boiler) and has a 2-wire connection. To install a C-Wire ecobee support said to purchase a Fast-Stat Common Maker for each zone (makes sense), but
![Fast-Stat Common Maker Thermostat Wire Extender (Adds a Common C Connection) FSCM00 - The Home Depot Fast-Stat Common Maker Thermostat Wire Extender (Adds a Common C Connection) FSCM00 - The Home Depot](https://images.thdstatic.com/productImages/f1cef802-6ed6-4706-a71c-cf29e3bdf4aa/svn/fast-stat-thermostat-sensors-fscm00-64_1000.jpg)
Fast-Stat Common Maker Thermostat Wire Extender (Adds a Common C Connection) FSCM00 - The Home Depot
![Fast-Stat Common Maker Thermostat Wire Extender (Adds a Common C Connection) FSCM00 - The Home Depot Fast-Stat Common Maker Thermostat Wire Extender (Adds a Common C Connection) FSCM00 - The Home Depot](https://cf-images.us-east-1.prod.boltdns.net/v1/jit/1834613806001/d203874c-22f4-4bdb-9a48-e8083f5fefe9/main/1280x720/53s777ms/match/image.jpg?pubId=66036796001)
Fast-Stat Common Maker Thermostat Wire Extender (Adds a Common C Connection) FSCM00 - The Home Depot
![Confusing two wire setup. Do need a fast stat common maker? The black and red cables lead to the old thermostat. : r/ecobee Confusing two wire setup. Do need a fast stat common maker? The black and red cables lead to the old thermostat. : r/ecobee](https://i.redd.it/confusing-two-wire-setup-do-need-a-fast-stat-common-maker-v0-wanwt6bu338a1.jpg?width=3024&format=pjpg&auto=webp&s=cb8970341cdcb8eced60e31cef8225f535068a31)