We have two antique infrared heaters. The newest is probably 60 years old, whose simple design is seen in this
modern version.
At only 800 watts, the newer heater not only warms everyone in our Wolfeboro "Great Room", it'll continue to keep this "Open Design" toasty all night if I forget to unplug it. (Neither heater has a fan). The heat is adjusted by moving to a different chair!
A suggestion: Don't aim it at a refrigerator, or everything in it will be frozen...
A second infrared heater has its reflector made of handmade decorative polished copper from the 1920s, and I don't dare use it!
Less convenient is our third infrared heater that is fitted to a propane tank.
Propane versions to heat people
outdoors are everywhere on the Internet.
Indoors, your best bet is a modern 800-watt electric infrared heater:
https://5.imimg.com/data5/AX/CV/QT/S...er-500x500.jpg