What ever happened to those old fashioned, radiators that used hot water to warm the house? Those things worked quite well, and I'm sorry they aren't around much anymore.
And while I'm at it, another gripe that I hope to correct soon. That is the old Murphy bed. I'm now in my "Front bedroom" which has no bed right now, it's all sewing and computer and crafts, but with a guest coming for a few days I have to put up a temporary bed/folding cot with warm quilts. Another old song about "they don't make them like they used to".
Yes, that electric heater will sure help you if it's kept in one closed room. Wear a warm neck shawl, quilted housecoat, and even quilted house shoes with thick felt soles. I have a pair almost like that, with a pair of old Ragg socks (sold by LL Bean) sewed onto a thick felt bottom after they got holes in them. Keeps my feet toasty!