A thermostat system comprises a thermostat located on the inside of the building, comprising (i) a screen display, (ii) a control input for receiving thermostat programming information, and (iii) interface circuitry for coupling to an environmental system comprising one or more items of equipment selected from the group heating, ventilation, and air conditioning equipment. A doorbell is located on the outside of said building. Optionally a camera may be located proximate said doorbell.