... made of high purity cordierite and other components. It has the characters of good thermal shock resistance, high mechanical strength, ... in gas-infrared burners, infrared gas stoves, infrared heaters, gas water heaters , gas burner, oven, BBQ and so on.Main ... low noise.3. Windproof, outdoor operation using safely.4. Reduce the harmful gas more than 90%. Infrared ceramic plaque for gas water heater