The surface-mount design allows for flexible positioning on the blower housing

This air pressure sensing switch features a durable glass-filled polycarbonate body and a resilient silicone diaphragm

Is this valve bi-directional

Robust Torque Output: 44 in-lb for reliable operation in diverse applications

or lead to inefficient combustion

Johnson Controls A19ADB-25 Utility Thermostat 30067439-890 The surface-mount design allows forJohnson Controls A19ADB 25 Utility Thermostat, 120 208 240 Vac, 65 300 Degree Temperature Range, 6' Capillary Length, Open Hi, Remote Bulb, Manual Reset, Screwdriver Setpoint Adjustment A19ADB 25 is identical to A19ADB 25C