D.M. Procida wrote:
http://www.westcountryfires.co.uk/fires/products/382.asp

It's a flueless gas fire. In other words, all of the carbon dioxide it
produces will remain in the room, instead of going up the chimney to
draw in fresh air from outside.

"the fire has the ability to burn off the odorous and stale air in the
room and efficiently return warm and neutral air back into your
airspace"

Wow.

Daniele

They replace the odours with another set of their own.

The thing that bothers me most about these sort of fires is the condensation
they create. There's an awful lot of water created by them when burning
gas!