What is a Gas Flued Heater?
Gas flued heaters are heaters that have a flue that vents the byproducts of gas combustion outside of the home. They are typically installed in old fireplaces to easily accommodate the flue, although they can be installed elsewhere.
There are two broad types - radiant or convection. A radiant gas heater is the sort that has a visible gas fire behind a grate. The modern versions of these have a fan to spread the heat throughout the room. The other type is a convection gas heater that blows hot air into the room. They both run on natural gas and are a popular heating option.