Get a heated mouse (those exist), heated mouse/desk pad (those exist), heated chair(pad), heated footpad (often bought for animals), some IR thingy for the head

Get a heated mouse (those exist), heated mouse/desk pad (those exist), heated chair(pad), heated footpad (often bought for animals), some IR thingy for the head and you're covered. Any mask over your nose/mouth will retain a lot of warmth and humidity. This is the same logic for electric cars where heat is expensive: conduction>>> convention. Heat the occupant(s) and not the air with heated steering wheels & heated seats. Some ICE gear shifter knobs would get warm from transmission conduction! At one point in life, I had a heated mattress pad so I could turn the heat off a lot. I just ran it before I went to bed so it wouldn't be frigid when I got in. In the morning I'd just run into the shower and leave for the day. My place was western facing (in northern hemisphere) so I got a lot of afternoon sun and would return to a warm place in the afternoon.