I'm going to run a radiant tube heater this winter.
Heats like the Sun and is supposed to reduce fuel use by 30-50%
They have been slowly retrofitting all the chicken houses around here with them to get rid of the forced hot air heaters.
Radiant tubes heat every surface including the ground, and then the air is heated from those surfaces by redirecting or convecting.
There are other benefits. Here is a long but interesting paper on RTH:
http://www.rg-cloud.com/RG/manuals/I...ual-lo-res.pdf