Commercial HVAC repair. Installed 2 customer supplied thermostats, furnace for show room has noisy inducer motor. Inspected and serviced 5 unit heaters, 2nd unit west in main warehouse, doesn’t have gas supply. Heater in wood cutting area needs replacement. For installation of WIFI thermostat on unit heaters, common wire would have to be ran from transformer. Far west unit heater also doesn’t have gas supply. Looks like 2 meters are missing on NICOR gas supply.