I have a 60,000 btu propane torpedo heater that I tried in my 32x48 garage at the beginning of winter while last-minute grinding and brush painting a mower deck for family.
Even with a gable vent fan running, lots of air from the other gable vent as well as at the eaves, and the garage door propped open on a 2x4 I still felt "weird" working in the warmth of the heater.
I know those aren't nearly as efficient as "ventless" heaters (not to mention noisy), so I'm a bit reluctant to try the torpedo in the very vented shack/barn.
I found https://www.mrheater.com/30-000-btu-...ne-heater.html and oddly it has an optional fan to somehow blow warm air from the radiant plates.
Seems sorta against the little I understand about radiant vs convection, but it must work or the manufacturer wouldn't offer it.
The price can be as low as $179.99 at a place roughly 20 miles from home.
Nice thing about this unit --- I can either hang it permanently or leave the feet on and use it as a sorta "portable" heater anywhere I feel the need --- even in my house in case of power failure with all-electric heat.
The whole purpose for a heater really boils down to me being warm and comfy since this IS supposed to be fun and not a chore.
Any other benefit would be just that -- an additional benefit of a heater.
A friend has this brand vented heater over his antique vehicles http://www.robertsgordon.com/garage-heaters-infrared and a bigger version in our firehouse.
Nice stuff, but the ceiling in my pony barn is too low.
While we're speaking of "comfort", does anyone have a modern TV in their unheated shack? What type of screen, and how does it do for longevity and viewing?
Last year I put in an old cathode ray tube version left over after Mom left us in 2012. Works decent with a digital converter and plate antennae in the rafters, but takes up a lot of room and faces on the screen are slowly turning green.