Which of the following is NOT applicable to doorbell intercoms?

Doorbell intercoms typically serve functions related to communication and convenience at the entrance of a home, such as allowing visitors to communicate with residents through video and audio, and providing a level of security by enabling the homeowner to see and speak with individuals before granting them access.

While doorbell intercom systems may sometimes be integrated with smart home systems to control lighting or enhance safety features, controlling temperature is not a typical feature of doorbell intercoms. Temperature control is usually managed by separate HVAC (Heating, Ventilation, and Air Conditioning) systems or smart thermostats designed specifically for that purpose. Therefore, stating that doorbell intercoms are used for temperature control is inaccurate and makes this choice the correct response to the question.