A helix can´t handle those watts, but here a couple of thermostats that do ..

1. Jhonson thermostat
These thermostats Have a 1500 watt capacity MAXIMUM capacity, digital readout, and maintain their setting after a power failure. They are very similar to the Ranco ETC's. Now available with an optional black PVC stand (see Thermostat Stand) to help reduce clutter and keep your thermostat securely mounted.

2. Kkontrols thermostat
These are very cheap (about $40), reliable and can also handle 1500 watts

You can wire an Helix to a current swithc (I not sure about this name), to use wattage heater