The upstairs of my shop is where I do my reloading and store my guns. Moved them out there this summer and also installed a air conditioner to keep things cool. So for this winter I am going to have to install some sort of heating unit. The room is about 350 sq. ft. And is insulated. Question is what is the difference between convection heat and radiant heat. The heater will be a propane type heated. And I know I will have to put A humidifier in the room. What would you guys use the will put heat out and won't cost that much to run. Jason P.S.: The building was already built when I bought the place so I would have put heat in the floor some how.