tube heater, radiant heater. questions

I have a 16 by 24 semi insulated woodshop, I only heat it when I am in it. I have a propane garage heater that is 100k btu that heats it up fast but even on low it gets to hot, then it starts to get cold. I have a 30k wall hanging propane heater that doesn't seem to do much, what I have been doing is turn both heaters on, when it gets hot turn off big heater, it then gets cold in about 30 minutes. I have seen the tube style radiant heaters at businesses and I thought they would work great for the woodshop. has anyone used them? looking on ebay you can get around a 50k unit about 800$. thats a lot of money but there have been alot of times when I didn't go to the shop because of the cold. also the ceiling mount heater wouldn't take up floor or wall space.



something like this

http://ift.tt/1EgGEN8

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tube heater, radiant heater. questions