Johnson Controls A19ADC-37 Utility Thermostat 30067439-890 Why use an HH core

Why use an HH core instead of a standard core

For contractors performing essential maintenance or emergency repairs

this 1/4" NPT or clip-on style probe offers the necessary response time to prevent system hunting and maintain commercial HVAC efficiency under varying load conditions

Durable Construction: Built to withstand the thermal stress and mechanical demands of continuous-duty HVAC cycles

Johnson Controls A19ADC-37 Utility Thermostat 30067439-890 Why use an HH coreJohnson 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