I am planning to change the radiator in the bathroom for a heated towel rail, but before I do, I want to be sure of the air bleeding procedure as I am only used to central heating in 2 storey homes.
The process is normally easy to understand when you know how. As air rises in the system, in a 2 or more storey building, you work from the top floor to the bottom, bleeding the air out.
We moved a few years ago into a bungalow and the pipework leaves the boiler, goes into the loft, and drops down to a radiator, through the wall to another radiator in an adjoining room and then back up into the loft to go to another radiator in the same way.
I cannot find any bleed valves in the loft, so how do I bleed above the level of the radiators?