Designed to be more efficient than ever, the Kent Calisto Medium Inbuilt Wood Heater combines technology with modern design to suit all family homes. With coverage of up to 280 square meters, the slow combustion Calisto is the perfect choice for medium to large sized spaces. This efficient and environmentally friendly indoor wood heater is one of the cleanest burning heaters on the market, burning cleaner than the national standard for emissions of 1.5g/kg. Sturdy in construction, the firebox comes with a 10 year firebox warranty. Designed to fit seamlessly into an existing brick chimney, get the benefits of a traditional open fireplace with a modern design without the ashy mess to keep warm during those cold Winter nights.