#4 Radiant sensor 706—Many buildings employ temperature setback strategies to save energy. Temperatures in spaces in the building drift to near ambient conditions when the building is not occupied. When occupation reoccurs mechanical systems, which were designed for steady state load conditions, are now forced to overcome the mass load. The time the mechanical system is running and not meeting the thermostat set point as “unmet hours”. Many times spaces are intentionally or unintentionally overheated or over cooled to compensate for this condition. Studies have indicated that occupant comfort is a compilation of thermal range and maintaining a radiant mean temperature, or that condition where the radiant temperature of surfaces within the space neither add to nor remove radiant effects to the occupant's body. The radiant sensor described here and illustrated in FIG. 8 is a frame mounted to an exterior wall 801 that senses using an Infrared (IR) sensor, the outside wall internal surface temperature 802. Simultaneously, a thermocouple can sample surrounding air temperature 803 (isolated from the wall using an insulated frame, 804) and an IR sensor to measure the IR temperature of the surroundings 805. This sensor provides information to our virtualized thermostat and provides feedback in creating radiant mean conditions.