Thermostats themselves do not draw power/wattage directly—their wattage capacity depends on the rated amp capacity of the switch contacts. Standard line-voltage DPST thermostats are typically rated for 22 Amps (or 25A), which translates to 4,840 Watts at 220 Volts (22A × 220V). Please check the specific amp rating on the unit's label to confirm maximum load capacity.