Radiant Heating: Retrofit Radiant
The 1/16" thick heated panel can be hardwired (with an optional 7-day programmable thermostat) or simply plugged into a wall outlet. A minimum of 7/16", six-pound carpet pad is recommended.
The manufacturer recommends that the heated panel be glued to the subfloor or underlayment. Steam cleaning won't harm the panels, but dragging furniture across the carpet could cause damage.
Estimated daily energy expense is 30 cents per day (for 225 square foot area). Product warranty is five years and does not cover misuse.