You’ll find most of the technical information for Flue Sentinel here in TechniSpecs.

Here’s How Flue Sentinel Works:
1	Turn on your fireplace logs and a signal is sent to the Flue Sentinel.
2	The Flue Sentinel damper opens, then sends the “all clear” signal to the fireplace circuit.
3	The fireplace circuit then ignites the gas logs.
4	When you turn off your fireplace, a signal is then sent to the Flue Sentinel damper.
5	The Flue Sentinel damper closes when it’s safe to do so.

Flue Sentinel Compatibility and Engineering
Compatibility	Flue Sentinel 24-VAC Model - FSI
	•	Designed to operate 24-VAC, 60-Hz intermittent ignition and standing pilot ignition systems for gas log fireplaces installed in new construction and existing homes.
	•	Easy, expert installation by your trained and certified installer
	Flue Sentinel Millivolt Model - FSM
	•	Designed to operate with millivolt standing pilot ignition systems for gas log fireplaces installed in new construction and existing homes.
	•	Easy, expert installation by your trained and certified installer
Construction	•	Stainless steel
Construction	•	Available for flue diameters of 8 to 24"
Unit dimensions		Product Dimensions
Standard Features	•	Patent-pending damper design
	•	Universal mounting brackets
	•	Dual, redundant switches
	•	Unobtrusive design
	•	Power open and close
	•	Damper design locks in conditioned air when fireplace is not in use
	•	Eliminates drafts in home resulting from an open fireplace (flue)
Electrical	24-VAC Model FSI
	•	Minimum wiring requirements: 24 VAC, 18 gauge, -40 degrees to 221 degrees F.
	•	Power requirements: 3 watts at 24 VAC, 60 Hz, when opening or closing
	Millivolt Model FSM
	•	Minimum wiring requirements: millivolt, 18 gauge, -40 degrees to 221 degrees F.
Warranty		Standard two year limited warranty
Quality assurance	•	Tested and listed for safety
Quality assurance	•	Each Flue Sentinel damper is individually tested and inspected for quality
Country of Origin		U.S.A.
Manufactured by		Flue Sentinel, Inc.