... . It is mainly used in gas-infrared burners, infrared gas stoves, infrared heaters, gas water heaters , gas burner, oven, BBQ and so ... to 40~50%.2. High performance completely burnin, burn without flame, high burning efficiency, low noise.3. Windproof, outdoor operation ... using safely.4. Reduce the harmful gas more than 90%. Infrared ceramic plaque for gas water heater