Method of heating an environment composed of a plurality of zones , said method being implemented by means of a heating system comprising: - a radiant device , comprising at least one radiant element , for each single said zone , suitable to provide heat by irradiation, - said radiant devices being connected to a power supply suitable to supply alternating electric current at a given frequency, - a control device connected to said radiant devices , comprising: - and actuators suitable to turn on and off said radiant elements , said method being consisting of: - dividing into at least two groups said radiant devices , and thus said zones , - dividing an on time into two periods, in each of said two periods activating only one said group of said radiant devices , and disabling the entire remaining said group , - each of said radiant devices being on for an on period comprised in said two period, - said two period being at least 5 times greater than the period determined by the frequency of said alternating electric current, - by means of said control device and said actuators modifying the on time of said radiant devices as a function of the measurements of sensors , and consequently regulating the temperature of said radiant device by changing the on time; said method being characterised in that : - said control device comprises sensors of the temperature of said radiant devices and in that said method consists of detecting the temperature of said radiant devices by means of said sensors and communicating it to said control device , - said radiant devices extending mainly along a surface, have a thickness of less than 5 mm and a shape factor that provides for a thickness of 1 mm per m 2 of surface, - said period is less than the time causing a lowering of the temperature of one of said radiant elements of more than 0.3°C. - a radiant device , comprising at least one radiant element , for each single said zone , suitable to provide heat by irradiation, - said radiant devices being connected to a power supply suitable to supply alternating electric current at a given frequency, - a control device connected to said radiant devices , comprising: - and actuators suitable to turn on and off said radiant elements , - dividing into at least two groups said radiant devices , and thus said zones , - dividing an on time into two periods, in each of said two periods activating only one said group of said radiant devices , and disabling the entire remaining said group , - each of said radiant devices being on for an on period comprised in said two period, - said two period being at least 5 times greater than the period determined by the frequency of said alternating electric current, - by means of said control device and said actuators modifying the on time of said radiant devices as a function of the measurements of sensors , and consequently regulating the temperature of said radiant device by changing the on time; - said control device comprises sensors of the temperature of said radiant devices and in that said method consists of detecting the temperature of said radiant devices by means of said sensors and communicating it to said control device , - said radiant devices extending mainly along a surface, have a thickness of less than 5 mm and a shape factor that provides for a thickness of 1 mm per m 2 of surface, - said period is less than the time causing a lowering of the temperature of one of said radiant elements of more than 0.3°C. <EOS>