The esse 301 is the perfect solution to replace your un efficient smokey open fire it can fit easily into your standard fireplace with clay fireback still in situ and delivers up to 65 efficiencythis stove is suitable to burn wood or smokeless coal in smoke controlled zonescast iron steel constructionsuitable for standard 16 x 22inch fireplacesfits with clay fireback still in situsuitable for use in smoke control zones