I don’t know much about radiant heat, but, I did have electric heat in the house I purchased last year. I replaced the electric with baseboard radiators, and my heating bill to heat the entire house was less than just heating the bedroom at night. The cost per btu in our area(boston) is about $27 per million btu for electic, and about $8 for either oil or gas. I estimate that I will save enough in 3 years to completely pay for the conversion.