Most conventional gas fires have an open-fronted fireplace that is inset into a standard sized chimney. The air that the fire uses to create its flames is drawn from inside your living room and waste products are expelled up the chimney.

It requires constant ventilation to keep it burning. And because of this it consumes more energy and fuel than you can reasonably afford.

>>> Balanced Flues explained

>>> DRU Style and Comfort: Cello, Saxo Scenic and Vision (balanced flu)

>>> DRU Style and Comfort: Allegro, Romano and Concerto (traditional flu)