The esse 350 se contemporary defra approved inset stove a convection fire offering a unique combination of performance style efficiency and ease of installation esses new award winning 350 se defra approved stove builds on the unique strengths of the 300 to provide a higher level of performance and efficiency available with either black or stainless steel finishsuitable for standard 16in x 22in openingfits with clay fireback still in situsuitable for over night burn