A programmable thermostat is a type of thermostat that allows the user to set a schedule for the heating and cooling system, so that the temperature can be automatically adjusted at different times of the day. This can help to save energy and money by reducing the amount of time that the system runs when it is not needed. Programmable thermostats typically have a digital display and can be controlled using buttons or a touchscreen.
A non-programmable thermostat, on the other hand, does not have the ability to set a schedule. The temperature can be manually adjusted using a dial or buttons, but it will remain at that set point until it is manually adjusted again. Non-programmable thermostats are simple and less expensive compared to programmable thermostats.
Both types of thermostats are widely used, but programmable thermostats are more popular in residential and commercial settings because of the convenience and energy savings they offer.