Check out
for a neat line of baseboard heaters that look exactly like a skirting panel, and claim to be more energy efficient than radiators and under floor radiant heating.Its called ThermaSkirt.
Being only 3/4" thick and available in a variety of styles and finishes you can install them right around the room.
They create a feel like under floor radiant heating, but without digging your floors up.
They can even work with re-newable sources such as air to water and air to air heat pumps and solar.
You can retrofit to existing boiler and stove systems, and replace conventional radiators.
They even have a neat design-on-line software that you can download from www.thermaskirt.com that you can drwa you room and get the heat calculations. Only drawback is that its in metric - mm's and watts rather than feet and BTUs.
Have a look at www.discrete.co.uk. They're made in England but are being exported to Canada.