The SZ1041a is a make-up air thermostat. It is used to control air-handling units and make-up air units with modulating economizers and/or modulating heating or cooling.
SZ1041a TCS Basys Make-up Air Unit Thermostat: 365-Day
365-Day Make Up Air Thermostat control
of fan 2 heat and 2 cool stages and modulating economizer or heating or
cooling output



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