Gas Patio Heater 13.5kw Outdoor Wheeled Garden Heater Burner. Gas heater made of high-quality stainless steel construction with a power of 13.5 kW. User-friendly piezo ignition system to operate at the touch of a button. A set of wheels with two smooth-running wheels is included and allows easy transport of the heater. Safety tilt valve that automatically interrupts the gas supply if the heater falls over.