The Peanut 5 features all-cast-iron construction for maximum heat-retention and ultra-clean-burning, by keeping the belly of the fire hot even during ‘low & slow’ burning. Cast Iron construction also makes for an extremely rugged stove with long life. It’s viewing window is huge for a compact stove. This can make some installations so much simpler and easier . It rarely would need any building/alteration work need to be done even with a small chimney opening.