It’s not a good idea to place a sofa, or any other large furniture, in front of a radiator.
A sofa would block heat from travelling freely around the room, and could suffer potential long-term damage from a close level of heat exposure.
To save energy and protect your sofa, try to leave a generous space behind the furniture. You might be surprised and how effective this is at increasing the warmth of your space.
If you would like any more radiator fitting tips meanwhile, be sure to consult our how to install a radiator blog. And for inspiration surrounding the best radiator models to select for your home, browse our comprehensive radiator buying guide.