> Is it ok to install a combi boiler in a small (about 2x2x1m) attic
> space I have above my bathroom ? Access is via a hatch and a small
> ladder from the room beneath. Apart from the flu pipe and the
> occasional time that I open the hatch there is no ventilation.
>
> Of course I will have to pick a combi that has remote operating
> controls and I am assuming that such a device is available.
There are many models of combi boilers which require no additional compartment ventilation. The control system is easy if you use an external timer/thermostat/programmable thermostat.
The main objection is the ease of servicing access. Boilers in loft spaces ideally require good access (loft acess, boarded area), and isolation gas/water and electric from below.