Johnson Controls T-4000-3144 Plastic Cover allow the furnace to run

allow the furnace to run with insufficient venting

provided the MFD rating remains exactly 12

Direct Compatibility: Engineered specifically for the TP970 series and TP9600 series

preventing hazardous accumulation in the mechanical room

this Reznor replacement part is specifically calibrated for the pressure ranges and port depths found in Reznor heating equipment

Johnson Controls T-4000-3144 Plastic Cover allow the furnace to runMaintain the integrity and professional finish of your pneumatic control systems with the Johnson Controls T 4000 3144. This high density white plastic thermostat cover is specifically engineered for vertical mounted thermostats, providing a streamlined, tamper resistant solution for commercial HVAC environments. Designed as a direct replacement for the T 4000 series, this model features a concealed design with no thermometer window and no setpoint