The Woodpecker WP4 is the smallest of the stoves in the range. Fully constructed from cast iron, it packs a punch with it's nominal output of 4.3Kw and is suitable for woodburning. EcoDesign Ready. This little stove features a large glass door for excellent views of the flames and is EcoDesign ready meaning it is one of the cleanest stoves on the market making it ideal for sustainable heating. Defra exemption means it is able to burn wood in smoke controlled areas. It has some of the lowest clearances for any stoves in the UK and has the option to add Direct Air making it ideal for new build installations.