The Honeywell CT30A1005 Heat Only Thermostat has low voltage controls with a snap-action switch for heating systems. This non-programmable thermostat comes with mounting hardware (wall plate included) and does not require leveling. For straightforward temperature control, there's no substitute for Honeywell Non-Digital Thermostats. This manual thermostat controls heating in your home simply and effectively. Mercury free and compatible with heat only systems, this Honeywell Non-Programmable Thermostat has been an industry standard for years.