Element4 Summum 140 3/S (54" Linear 3-Sided Gas Fireplace)The Summum 140 3 S from Element4 is a stunning, 3 sided, linear fireplace that offers the highly sought after bay style installation. The Summum 140 3 S features an expansive glass viewing area of 54 W x 16 1 2 H, and its virtually frameless structure and seamless glass corners make it an interior designers dream. And of course, with the award winning real flame burner system from Element4, the 3 sided Summum 140 guarantees you an ultra realistic fire