Radiators should typically be mounted so that the foot of the radiator is positioned a minimum of 150mm from the floor – though anywere from around 100mm x 150mm should suffice if your space allows.
The height of nearby floorboards and skirting could influence how high a radiator is fitted, if only for aesthetic reasons, and you may sometimes want it to sit a little higher or lower.
For more radiator fitting help and advice, consult our dedicated blog on how to install a radiator. Or, for initial inspiration regarding the finest heating solutions to add to your home in the first place, visit our comprehensive radiator buying guide.