I used one that was an older style before ioninzer and teflon coatings and it was fine
it was a small square one (table top) size, that if it got knocked over it automatically shut off - which is a plus and that's the only kind we want to buy, but it's getting hard to find those kind.
I had it over in the corner of the birds room where the birds didn't go sitting on a small table and it kept the birds room at a nice 70 degrees all winter long. I'd got in there and sit because the front of the house was cold , and i had the heat set normally between 70 - 80 and i still sat here in jogging pants, sweat shirt, socks, covered up with a thick fleece blanket and was still cold
it was a small square one (table top) size, that if it got knocked over it automatically shut off - which is a plus and that's the only kind we want to buy, but it's getting hard to find those kind.
I had it over in the corner of the birds room where the birds didn't go sitting on a small table and it kept the birds room at a nice 70 degrees all winter long. I'd got in there and sit because the front of the house was cold , and i had the heat set normally between 70 - 80 and i still sat here in jogging pants, sweat shirt, socks, covered up with a thick fleece blanket and was still cold