Johnson Controls A19ADC-37 Utility Thermostat 30067439-890 Is a vent line required

Is a vent line required for indoor installation

For contractors performing essential maintenance or emergency repairs

Why use an HH core instead of a standard core

this NTC thermistor provides the critical resistance data needed by the HVAC control board to manage staging and prevent equipment short-cycling

simplifying inventory and replacement

Johnson Controls A19ADC-37 Utility Thermostat 30067439-890 Is a vent line requiredJohnson Controls A19ADC 37 Utility Thermostat, 120 208 240 Vac, 90 325 Degree Temperature Range, 10 Degree Differential, 10' Capillary Length, SPDT Open Hi, Remote Bulb, Manual Reset, Knob Setpoint Adjustment A19ADC 37 is identical to A19ADC 37C