Q: What is the difference between the GPT-3 and SST-2?
A: The GPT-3 has the capability of using two temperature sensors when controlling constant wattage cable so it can be used with both constant wattage and self regulating cable.
|ETI GPT-3 Freeze Protection Thermostat with GFEP, 120-277 VAC UL / CSA|
|ETI SST-2 Automatic Freeze Protection Electric Thermostat. Up to 30Amp Heater Loads. On below 40F & off above 42F|
|ETI Tracon SST-3 Adjustable Set Point Electronic Thermostat with Ground Fault Equipment Protection|