1 x Mushroom Style Patio Gas Heater 13KW Features Keep your outdoor areas cosy year-round with the TM-PHM13S gas patio heater from Tough Master®. The patio heater’s housing is made of heavy-duty brush-finish stainless steel, so it’s super-durable, highly corrosion-resistant and tolerant of both high and low temperatures; the heater has a sleek, modern look, and at over 2m tall, it will make an attractive focal point for any outdoor area.