This draft regulator maintains a consistent natural draft by automatically compensating for changes in atmospheric pressure and chimney temperature

Does this drier require a specific orientation

this is an integrated furnace control that manages the hot surface ignition or spark ignition sequence internally

not primary shut-off valves

What systems typically use this seal cap

Lennox 29M17 Limit Switch Els PW 29614 This draft regulator maintains aWhen you're troubleshooting a furnace that's short cycling or throwing a four flash diagnostic code, the Lennox 29M17 Limit Switch is often the first component to inspect. As a critical OEM replacement part, this L215 40F limit switch is engineered to protect the heat exchanger from thermal stress. It features a fixed setpoint that opens the electrical circuit at 215F and automatically resets once the temperature drops to 40F, ensuring the HVAC system