A sophisticated stainless steel burner that’s at the heart of a diverse range of EcoSmart Firebox Inserts and Freestanding Fireplaces. And the BK5’s compact, lightweight design enables it to equally be integrated into individual fire designs for indoor and outdoor spaces, both residential and commercial. BK5’s versatility is underscored by its popularity among designers, builders, developers and specifiers – not to mention EcoSmart Fire’s design team.