I`ve installed a number of the ProCom heaters, they are pretty good quality...
However, I recommend the blue flame models, as they heat via convection much faster than the radiant panels..
there are different sizes avail depending on your room size, and these heaters have a built in thermostat as well..
As with any vent free heater, they MUST be cleaned yearly with compressed air, or they will start producing CO.
if it aint broke, tweak it!!
currently on FiOS (kick aZZ!)