i have a tall portable heater i got from my old job. It works with a remote too. Once while still at my job, the heater quit working and I gave it to the maintenance department to keep. They fixed it and brought it back to me since it's more for a small area and not a large open one like theirs. Nice of them. it still works fine. Now, it's outside my sewing room. In the larger area where i watch t.v.
. My sewing room gets warm after awhile with the lights on and if i open a heating vent too. So no worries there.
i have a small square portable heater for the upstairs bathroom. It really blows heat out very well. You may look for one like that. Not sure of the name but it cost a bit if I remember.