Dorothy, PM me your address and I'll mail you some of my 3-layer masks. They do the trick.

Charmion, I have some of the oil filled radiant heaters in the greenhouse and garage because I wanted a warm spot with no exposed elements. I have the little ceramic heaters with fans in each bathroom and have been known to move one of them into the office on occasion. The link (in case it doesn't work) is the Home Depot and it looks like they have the radiant oil filled fans that just heat, and some with thermostats and timers.