Not sure what the specks exactly are on that specific thermostat, But I have several spider robotics herpstat thermostats they have quite a few different thermostats for sale. Their single herpstat i think will handle up to like 700 watts. They have a herpstat 2 that handles up to like 900 watts per probe or plug. and a herpstat 4 that handles up to 1600 watts total. These are great thermostats that handle quite a bit of power. I have used them for years and they work wonderful. What I would suggest is look at the max. watts the thermostat will handle and go from there. Are you using flexwatt and if you are what watts is it. Then add up the total run of the flexwatt and see if the thermostat will handle 2 racks. Hope this helps........Originally Posted by mbaker8686
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