The First Condensing Vented Gas Fireplace Certified for Use in the U S The super-efficient Mantis exceeds 93 percent efficiency A F U E - certified to American National Standards Institute criteria - making it the most efficient vented fireplace you can buy * The Mantis stands alone as the most efficient fireplace you can buy The concealed three-stage heat exchanger captures more than 90 percent of the heat energy from the burner and directs this warm air into your home - not up the flue With so much of its heat extracted the exhaust can be vented outdoors in conventional PVC piping - saving money labor and space on installation compared to traditional direct-vent systems The Mantis puts the green in environmentally friendly Its powered inlet/exhaust blower ensures the optimal air/fuel mixture for consistently clean-burning operation under any conditions

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More info: Empire The Mantis High Efficiency Condensing Vented Gas Fireplace System - PV28-SV50