Jo wrote:

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.


--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at www.diyfaq.org.uk
Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html