Apart from an electric blanket, in my experience nothing really works when your house is cold. Latest gadget I tried was a 700w infrared panel in the bathroom since these have been hyped recently. It’s… fine, but far from the confort traditional heating offers. Mostly you feel warm on the side that radiates the heat and cold all over any other side. Also it takes so long for it to get warm, I’m done by the time it’s useful. I thought 700w will be overpowered, but nah. Not even close.

I’ve stopped believing in the heat the human not the house mantra. It just leads to perpetual uncomfortable state any time you’re transitioning from activity to activity, or you’re just freezing your butt off as you’re washing dishes or loading the washer or any other activity where your heart rate is not up.

A better approach I think is to insulate the house then live in confort.