he Peanut 3. Originally designed as a compact 3kW its actually so efficient it will achieve up to 4.7kW if required. Its viewing window is big for a compact stove! ‘Peanut 3’ – can fit a very small UK chimney opening of less than 16” wide. This can make tight installations so much simpler and easier rarely would any building/ alteration work need to be done even with a small chimney opening.