Abstract: A control method and mechanism for switching heat generating equipment which requires the steps of:positioning a control box containing a block positioned within an insulating material in association with a building;maintaining the block within the control box at a first pre-set temperature (T1) during shut down conditions of a heating system incorporated within the building and which is to be operated by the control box;deactivating at a pre-determined period prior to the time the building is to be occupied a heater which has maintained the block at its pre-determined temperature;allowing the block to cool to a pre-determined temperature (T2); andactivating a main control mechanism or switch of the heating system when the block has cooled to the pre-determined temperature (T2) so that the building is heated to reach a desired temperature at start time for use of the building.