They don’t use any air from inside your home. As a closed and sealed system, they’re more efficient than B-vent fireplaces. They’re also more flexible to install since they don’t require ...

Natural-vent gas fireplaces, a.k.a. B-vent fireplaces, draw air from inside the home to feed the flames, then vent combustion gases up through a chimney. In this way, they function like a ...