[JavaBrewer]

I have been fortunate to land a job working from my home. For most of the year I am totally comfortable but for those couple months where the weather is colder I need some heat support. My home office is upstairs in a 10x12 room contained in a rather large dwelling. I would prefer to not run the upstairs furnace and simply heat my office. Temperature I am looking for is 72-73F. So given that scenario what does the the Pelican brain trust recommend? Will a simple 110V radiator heater work or is there something more efficient that I am missing?

Thanks in advance folks.