The Larger capacity ‘Bignut-5’ – A physically larger version of the Peanut, still rated at 5kW nominal (official output), but with the extra capacity, more physical size and takes longer logs. The Bignut-5 has a variable output range from 2kW up to a maximum of 8kW with easy to operate fingertip controls. A huge viewing window for superb views of the fire. Full cast-iron inner secondary lining plates (fire bricks), for maximum heat retention and are extremely robust.