As most all ventless hearth systems rely on oxygen from the home for combustion, they will not have any solid glass panel or protective barrier like the Direct Vent Fireplace Inserts
we offer, which will also feature a protective barrier screen placed in front of the glass to prevent accidental contact. There are some ventless inserts like the Empire VFL28IN92N Loft Vent-Free Fireplace
which offers an optional tempered glass front with openings along the top and sides of the front for ventilation which effectively seals the combustion chamber, but this is normally not offered with most all ventless systems. While advertised as a fireplace, please note that this model may also be installed inside of an existing prefabricated wood burning or masonry fireplace opening, just like an insert.