Dammit, we're having one done next month, in place of a gas fire, its coming in at about 2.5k (about 1200 of that is for the stove). The biggest cost is the flue liner. This is not for fire regs - we've got a nice big '70s brick external flue - its to ensure the correct diameter for gas bouyancy to safely carry it out of the chimney without condensing on the inside. You've also got to have a certain hearth depth and if you are going for a freestander, a given amount of space around its sides and top (i.e. no encroaching walls).
Edit: we're getting similar type to what dooks mentioned
Dammit, we're having one done next month, in place of a gas fire, its coming in at about 2.5k (about 1200 of that is for the stove). The biggest cost is the flue liner. This is not for fire regs - we've got a nice big '70s brick external flue - its to ensure the correct diameter for gas bouyancy to safely carry it out of the chimney without condensing on the inside. You've also got to have a certain hearth depth and if you are going for a freestander, a given amount of space around its sides and top (i.e. no encroaching walls).
Edit: we're getting similar type to what dooks mentioned