Mushroom Top Outdoor Gas Heater £79 for a mushroom top outdoor gas heater from English Home Store Heater: Get a standing mushroom top outdoor gas heater. Garden: Keep your garden cosy and warm even in colder months! Ignition: Features a 13kw piezoelectric ignition and control valve to allow for temperature adjustment. Cover: With wheels for easy movement and a protective cover included! Bronze: In a stunning bronze colour with a powder coating on the metal to ensure durability. Size: 81cm x 81cm x 212cm.