1. A heating, ventilating, and air conditioning (HVAC) control system comprising: a processing system in operative communication with a radiant heating system, the processing system being configured and programmed to control the radiant heating system according to the steps of: acquiring historical temperature information regarding heating of an enclosure during at least one historical period in which the enclosure was heated by the radiant heating system under the control of said HVAC control system; determining a plurality of candidate radiant heating control strategies based on said historical temperature information; determining an optimal radiant heating control strategy from said plurality of candidate radiant heating control strategies by computing a plurality of predicted temperature responses corresponding respectively to the plurality of candidate radiant heating control strategies; and controlling the radiant heating system according to the determined optimal radiant heating control strategy.