Check if Zen will work for you

Turn off your system, using a switch or shut off the power at the fuse box. Then, remove the cover from your current thermostat. Depending on the model, some covers can be easily popped off, while others may need to be unscrewed.
Make sure you don't have a high voltage thermostat How to check
My thermostat is labeled 120 volts or 240 volts.
My thermostat has thick wires connected by wire nuts.
I control my heater from a dial on the unit.
None of these options apply.
Select your existing wires
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