The room thermostat can, however, be used to turn the system off when the room is unoccupied, or on when the room is in use. Solid-state duct limiters are also available for even greater protection of settings. Thermostat Maintenance Thermostats should be checked and calibrated periodically, along with heating plant annual maintenance. This is especially important in buildings which house dusty equipment or materials and low voltage controls, where extra care is needed to maintain clean, efficient electrical contacts. A seven-day programmable thermostat can be customized for different days of the week.
Some time clocks allow control of temperature, lighting and ventilation systems.
This allows for varying start-up time in the morning depending on outside temperatures. Cooler exterior temperatures will require a longer warm-up time.