The Fireplace Xtrordinair 864 HO (High Output) is the ultimate high-performance gas fireplace, combining dynamite flame appearance and the greatest heat output of the entire 864 family of fireplaces. Powered by the GreenSmartTM gas system that efficiently heats the home while saving on energy usage and lowering heating bills. The real power of the GreenSmart system is the entire collection of components, controls and technology features like: accent lights, flame adjustments, blower control and a choice of pilot ignition modes. The fabulous wood-like fire appearance, seven-piece log set, featuring the Dancing-FyreTM burner, accent lights and 260 CFM blower are all standard on the 864 HO! The 864 HO features film-cooling technology that allows for maximum heat output and closer clearances to mantel.