A HVAC pro can use a 24 VAC power supply, and a contactor to do the job.
Contactors (relays) can be rated for plenty enough amps for your job.
And, with 24 VAC power supply, you have a much wider range of thermostats to
Christopher A. Young
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A couple of the Honeywells are rated at 10 and 10.4 A for 120v, but I
don't think this is quite enough. Any thermostat that you feel would
be safe? Cadet used to make a 120v only model with a high amp rating,
but these are discontinued.
Help much appreciated.
P.S. Must have digital, but don't need programmable.