yes the older models could pump c/o around the house....less and less gas engineers are requalifying to work on warm air as there is no money in it...the goverment is pushing to stop the sales of less efficiant c/h systems and this is putting the final nail in the coffin for warm air....however there are folks that like warm air...its possible to intall a wet ch boiler that sources heat to a warm air unit via a special heat exchanger...expensive and Ive never saw one installed in the uk ..