Bertha specialises in charcoal ovens for professional kitchens and outdoor spaces. These are built from heavy-duty stainless steel and operate as fully enclosed chambers. The design uses a clever combination of heat types to cook up to 40% faster than a standard open grill. With a temperature range from 100°C to over 550°C, a Bertha can function as a smoker, a roasting oven or a high-heat searing station. It can maintain these temperatures for up to 9 hours on a single load of charcoal. A key feature is the tall internal chamber, which offers 15 rack heights to give you precise heat control. Safety is managed by an integrated 'Fire Break Hat' to prevent sparks from escaping. Heavy insulation also ensures the outer casing stays cooler than the oven inside. The collection includes the Bertha Original and the more compact Professional X.